Asteraceae

Taxonomic Review/Revision of Antennaria and Symphyotrichum in BC https://open.library.ubc.ca/cIRcle/collections/ubctheses/24/items/1.0378325

Family: Asteraceae

Group: Vascular Plant, Species

Scientific Name	Common Name	Summary
Achillea millefolium	Yarrow	Perennial aromatic herb with finely dissected leaves and small white compound flowers commonly found in meadows, cliffs and well drained disturbed locations from sea level to subalpine. Collections from throughout the region.
Achillea ptarmica	Sneezeweed	Apparently no more than a couple of collections from the region. One in arctos (from an old garden site at False Island on Chichagof Island). In addition, AKEPIC includes reports from Gustavus, Juneau, and the Stikine River (or Zarembo, georeferenced location and description do not match).
Agoseris aurantiaca	Mountain Dandelion	Collected from Glacier Bay and the northern mainland (including upper Lynn Canal and the St. Elias mountains near Yakutat. Overall range appears to be mainly in continental mountains.
Agoseris glauca	Pale Agoseris	Several collections from the northeastern mainland. A single collection in arctos from just across the border near Hyder. Overall range seems to be primarily in the mountains away from the coast.
Ambrosia chamissonis	Silver Burreed	Only three widely separated collections, the first (in 1993) from Yakutat at the far north end of the region, the second (in 2003) from the middle of the region on Kruzof Island, and the last near the southern-most extreme of the region on Kanagunut Island (in 2005).
Anaphalis margaritacea	Pearly Everlasting	A fairly common gray green herb with round, white clusters of small flowers. Most frequently found on road sides, also found along gravel bars. Collections spanning the region, but with significant gaps (e.g., no Baranof Island or Southern Island collection records in Arctos).
Antennaria alpina	Alpine Pussy-toes	Collections primarily from northern mainland, but also a couple from southern mainland. One from Prince of Wales Island another from Admiralty Island are the only island collections.
Antennaria media	Dark Pussytoes	Perhaps ultimately best considered within Alpine Pussy-toes (Antennaria alpina), kept separate for now following FNA. Appears to be considered synonymous with A. alpina in Arctos records. It is unclear how many collections of this species/form have been made in Southeast Alaska.
Antennaria monocephala	One-flowered Pussy-toes	Collection records mostly from mainland mountains north of Juneau/Glacier Bay. One island collection from the north end of Admiralty Island.
Antennaria pulcherrima	Showy pussy-toes	Overall range appears to be more continental. In the region there are a pair of collections from Gustavus and another two from Haines.
Antennaria rosea	Rosy Pussy-toes	Collections in the region primarily from the northern mainland, with one collection from Baranof Island (Glacier Lake).
Antennaria umbrinella	Umber Pussytoes	Status of this species is unclear, although considered to occur throughout by Muller, most records in Arctos that show up when searching for this species are labeled Antennaria rosea ssp pulvinata. FNA does not list this as a synonym of A. umbrinella (or vice versa), and does not indicate this species as occurring in Alaska. Records shown on e-flora BC map indicate a more interior distribution, and if this species does occur in the region, it's probably along the margins.
Anthemis cotula	Mayweed	No collections in Arctos, AKEPIC reports only three observations from Skagway (2009), near Kook Lake on Chichagof Island (2005), and Rowan Bay (2004).
Anthemis tinctoria	Yellow Chamomile	Apparently no collections or reports from the region.
Arctanthemum arcticum	Arctic Daisy	Apparently reaches the southern extent of its range on the eastern Pacific coast in the region. Collections from the outer coast of Southeast Alaska are limited to Yakutat area and a single collection along the north side of Icy Strait. A record from Freshwater Bay on eastern side of Chichagof Island the only one on an outer island. There are scattered collections from the Stikine River mouth north to Skagway on the mainland and inner islands.
Arnica angustifolia	Narrow leaf arnica	Only a couple of collections from the Haines vicinity. Seems likely to be limited to the northern continental margins of the region.
Arnica chamissonis	Leafy Arnica	Apparently only four collections from the region in ARCTOS and/or e-Flora BC. North Prince of Wales Island, Mitkof Island, Haines, and Dry Bay.
Arnica cordifolia	Heart-leaved Arnica	Apparently only collection from Southeast Alaska was made near Haines. Overall range appears to be more continental, so probably limited to margins of region.
Arnica griscomii	Snow Arnica	Southeast Alaska appears to be at the southwestern limits of the range of this species. Only a single collection from the region in ARCTOS, from Mitkof Island. A second collection from near Haines is in a different herbarium. Mitkof Island records appears to be something of an outlier (both in terms of range and expected habitat), and this species is probably only to be expected along the north eastern margins of the region.
Arnica lanceolata	Clasping Arnica	Fairly common perennial herb with yellow daisy-like flowers found in riparian areas, meadows and along roadsides. Taxonomic changes make tracking collections a little difficult. In ARCTOS, most seem to be linked with A. lanceolata, while in e-Flora BC, more are associated strictly with A. lanceolata ssp. prima. In ARCTOS, collections from throughout much of the region, though more weighted towards the outer coast. Gaps in the extreme south, and in the central inner islands and mainland, but probably occurs throughout.
Arnica latifolia	Broad-leaf Arnica	Probably somewhat common herb with yellow daisy-like flowers and 2-4 pairs of opposite leaves. Collections from throughout, though more in the northeastern part of the region. Only three collections from outer islands, and none from the central mainland.
Arnica lessingii	Nodding Arnica	Several collections, mostly from the northern part of the region. A single collection from northern Prince of Wales Island, and another from Dall Island are the only collections in ARCTOS south of Chichagof Island (though it has been reported from Baranof Island, as well).
Arnica lonchophylla	Longleaf arnica	Apparently no collections from close to the region. Probably does not occur.
Arnica mollis	Hairy Arnica	Single collection from Shakes Lake in 1993. Even assuming collection is correctly assigned, it is not clear whether this species is established in the region, as Southeast Alaska would appear to be near the northwestern-most limits of the regular range (though there are a handful of collections from further west in Alaska). However, other collections from northwestern British Columbia suggest the possibility that this species could occur at the northern margins of the region.
Arnica ovata	Sticky Leaf Arnica	A single collection from a Juneau Icefield nunatak in 1982 is the only one for the region. It was reported to be common in the location it was collected.
Artemisia alaskana	Siberian wormwood	Nearest collections appear to be near the British Columbia/Yukon border north of Haines. Given primary range (northern/continental), this species, if it occurs at all in Southeast Alaska, probably only occurs at the very northern edges.
Artemisia campestris	Field sagewort	Status of this species is unclear. There are no collections from the region indicated on the maps for either ARCTOS or eflora-BC (nor any even particularly close). However, there quite a few collections in ARCTOS without georeferencing, some of which may be from Southeast Alaska. Both Muller and Hall note this species as occurring, however perhaps there have been taxonomic changes.
Artemisia dracunculus	Tarragon	Collected along the Stikine River at a spot georeferenced as just on the Canadian side of the border. Given overall range, it is likely to occur only at margins of region, if at all.
Artemisia frigida	Prarie Sagewort	No collections from the region, but one collection just across the border along the Stikine River. If this species occurs in the region, it is probably only at the margins.
Artemisia furcata	Forked Wormwood	Single collection from the Alsek River is the only record from the region. Overall more northerly distribution suggests this species is likely to be rare and/or absent in most of Southeast Alaska.
Artemisia norvegica	Boreal Sagebrush	Common plant of meadows near treeline. Also found on gravel bars of larger rivers. Several collections from both the southern part of the region as well as the northern mainland. Only a couple of collections from the northern islands.
Artemisia tilesii	Tilesius' wormwood	Known primarily from the northern mainland with collections from the upper end of Lynn Canal as well as the St. Elias Mountains and Harlequin Lake outside of Yakutat. Additional collections from just across the border on the Taku and Stikine Rivers, suggest it could occur in those areas as well. A single 2009 collection from near Hoonah is the only island record. The overall range of this species is more northern, and Southeast Alaska appears to be at the southern edge of its range.
Bidens frondosa	Devil's beggartick	Weedy annual native to North America Although reported in Muller and indicated for the region on the FNA distribution map, there are no collections of this species in ARCTOS nor any reports on the e-Flora BC map. The nearest are from the vicinity of Vancouver, BC, well to the south. AKEPIC also does not show any reports for the region.
Canadanthus modestus	Giant Mountain Aster	Abundance unclear. Seems like it may be possibly confused with Sub-alpine Daisy (Erigeron peregrinus) or Douglas Aster (Symphyotrichum subspicatum) Collections primarily from the northern (inside) mainland. A single collection from the Stikine River is the only one on the mainland south of Juneau. A collection from Game Creek on Chichagof Island, and another from near Craig on Prince of Wales Island are the only island records. Southeast Alaska is at the northern end of the overall range (a couple collections in southern Yukon are the only north of the region). In western Canada and the Pacific Northwest, there appears to be only limited collections from near the coast, so perhaps much of Southeast Alaska is marginal climate-wise for this species?
Centaurea montana	Perennial Cornflower	Common ornamental in many communities, may have started to go feral in some locations, but does not yet seem to be naturalized in the region. Collections in ARCTOS from Hyder and Juneau. Considered potentially invasive, AKEPIC data includes reports from other communities in the region as well.
Centaurea stoebe	Spotted Knapweed	Introduced and potentially invasive species. AKEPIC indicates reports of this species from several communities throughout the region.
Cirsium arvense	Canada Thistle	Several collections in Arctos, with many additional reports AKEPIC from communities throughout the region. Also a few reports from remote areas, mostly where logging activity has occurred (in particular, roads).
Cirsium edule	Edible thistle	Only collection in ARCTOS is apparently from the British Columbia side of the border near Hyder. Southern Southeast Alaska would seem to be at the very northern edge of the range of this species.
Cirsium foliosum	Leafy thistle, Elk thistle	No confirmed occurrence of this species in Alaska, the collections/reports indicated on e-Flora BC maps are all from from the Rocky Mountains well inland, so it seems unlikely this species occurs in the region.
Cirsium vulgare	Bull Thistle	Intorduced species considered a noxious weed. Has been reported as far north as Haines, but most reports are from the southern part of the region.
Conyza canadensis	Canadian Horseweed	Single 1982 collection from logging camp site is the only record for the region. Seems unlikely to be established.
Cotula coronopifolia	Common Brassbuttons	Only two collections in Arctos, both from Mitkof Island in the same bay. A third collection is indicated in the AKEPIC fact sheet for this species.
Crepis capillaris	Smooth Hawksbeard	Collections in Arctos from Skagway and Wrangel as well as two remote sites with human disturbance (logging or mining). Apparently no other documented reports.
Crepis elegans	Elegant Hawksbeard	No collections in ARCTOS from the region. The e-flora BC map indicates some reports/collections from the Haines triangle of BC. It appears the primary range of this species is more interior and/or northern.
Crepis nana	Dwarf Alpine Hawksbeard	No collections from the region in Arctos or indicated in e-flora BC, though the latter has a 1956 collection from mile 75 of Haines highway, just across the border. Overall distribution suggests if this species occurs in the region, it is most in the mountains of the northern border.
Crepis tectorum	Narrowleaf Hawksbeard	Introduced species. Has been reported (see AKEPIC data) in many locations throughout much of the region, especially on Prince of Wales and around Haines and Skagway.
Erigeron acris	Bitter Fleabane	Several collections from the northern mainland (in the vicinity of Gustavus and Haines/Skagway). Two additional collections from Hyder area. A single 2007 collection from Kosciusko Island is the only island record.
Erigeron compositus	Cut-leaved daisy	1979 collection from the Haines Highway is the only one from region in Arctos, with an additional one from just across the border near Atlin Lake.
Erigeron denalii	Denali fleabane	No collections of this species from Southeast Alaska in ARCTOS, though one collection said to be from Yukon appears to be georeferenced just on the Alaska side of the border between Yakutat Bay and Icy Bay.
Erigeron glacialis	Subalpine Fleabane	Treated as a subspecies of Sub-alpine Daisy (Erigeron peregrinus) in e-Flora BC, FNA considers a species. No collection records of this taxa in the state in ARCTOS, though a plant found in Sitka was initially identified as this species. https://archive.org/details/biostor-159535
Erigeron humilis	Alpine Fleabane	Perennial herb with purplish, hairy foliage and stems single white daisy-like flowers. Higher elevations, limestone outcrops, and recently deglaciated areas. Scattered collections, more from the northern part of the region. Not collected from Chichagof or Baranof Islands, though it has been reported from both.
Erigeron lonchophyllus	Spear-leaf fleabane	No collections in ARCTOS from Southeast Alaska, nor any indication of such from e-Flora BC, where nearest is from mile 86 of Haines highway.
Erigeron peregrinus	Sub-alpine Daisy	Pale to dark purple daisy common in meadows and rich fens from sea level to just above treeline. Many collections from throughout much of the region. What gaps are presumed to be from lack of collecting rather than non-occurrence. https://archive.org/details/biostor-159535
Erigeron purpuratus	Purple fleabane	No collections of this species from Southeast Alaska in ARCTOS. FNA lists this species as only occurring in Alaska and the Yukon. Status for Southeast Alaska is unclear, but it seems likely to occur only at the very margins, if at all. There has been some disagreement on the status of E. purpuratus. Some souces list it as a synonym of E. pallens, however G. L. Nesom and D. F. Murray (2004) support the seperation of the taxa.
Erigeron uniflorus	Northern Daisy	Not known from Southeast Alaska, it has been reported from BC near the Haines Highway not far from the border. The overall range of this species is more northern and continental. If this species does occur in the region, it is almost certainly limited to alpine regions of the mountains near the border.
Eurybia sibirica	Arctic aster	e-flora BC map indicates two ARCTOS collections from mountains along the north gulf coast. ARCTOS nomenclature appears to maybe consider this species synonymous with Sub-alpine Daisy (Erigeron peregrinus), since those also come up in the search for Eurybia sibirica.
Gnaphalium uliginosum	Slender Cudweed	Scattered collections or reports from throughout the region in towns or at old log transfer facilities. Appears that it is probably rare (with only a single data report in AKEPIC), so it is unclear to what extent this species is established in the region. AKEPIC also has G. palustre, but calls both species "low cudweed". There are several additional reports of this latter species in the data there, but no collections in ARCTOS, no reports anywhere close to Southeast Alaska on e-Flora BC maps, and FNA does not include this species for Alaska. May need some follow up.
Hieracium albiflorum	White-flowered Hawkweed	Only collections appear to be from upper Lynn Canal, upper Glacier Bay, and near Hyder. Occurrence apart from areas near the border is unclear, perhaps this far north it favors more continental influenced climates.
Hieracium aurantiacum	Orange Hawkweed	Introduced species with tendencies toward invasiveness. Collections in ARCTOS (from as early as 1960s) were made primarily along the road systems of several different communities in the region. AKEPIC data indicates reports widely distributed reports, especially in southern Southeast Alaska, mainly (but not exclusively) along roads or in other areas of human disturbance.
Hieracium caespitosum	Meadow Hawkweed	No collections of this species in ARCTOS, but reports from several communities (Juneau, Kake, Petersburg, Wrangell, Ketchikan) and on Prince of Wales in the AKEPIC database.
Hieracium lachenalii	Common Hawkweed	Several reports (in AKEPIC database) of this species from along the road system of Wrangell Island, as well as Zarembo Island. Apparently no reports from elsewhere in the region.
Hieracium pilosella	Mouse-ear Hawkweed	No collections in ARCTOS. Known from Prince of Wales Island where there is a single 2006 report (with plants pulled) included in AKEPIC database.
Hieracium triste	Wooly Hawkweed	Yellow ray-flowered composite with hairy stems and leaves common in open areas just above treeline. Occasionally found in meadows at lower elevations. Likely to be present throughout the region in appropriate habitat. Collections in ARCTOS from throughout much of the region, but with some gaps. Many from the Haines/Skagway area. FNA has lumped H. gracile with this species.
Hieracium umbellatum	Narrowleaf Hawkweed	No collections in ARCTOS. Reports included in AKEPIC database from several communities or other areas of human use, including Gustavus, Sitka, Petersbug, Wrangell, and Prince of Wales Island.
Hypochaeris radicata	Hairy Cat's Ears	An introduced species with the potential to be highly invasive. Collections from several communities in the region. Many reports in the AKEPIC database from the southern portion of the region, with fewer from communities in the north.
Lactuca biennis	Tall Blue Lettuce	Appears to be uncommon (or at least infrequently collected). Collected from only three locations all along Lynn Canal. Two were in upper beach meadow areas. Unclear how widespread this species is in the region.
Lapsana communis	Common Nipplewort	Two collections in ARCTOS, one from Ketchikan (1979) and two from Sitka (first in 1996). Many reports in AKEPIC database, mostly from communities, but also other areas of human activity (roads, logging camps, etc.). Seems to be more common in the southern part of the region.
Leucanthemum vulgare	Ox-eye Daisy	Introduced species that is common around towns. A few collections in ARCTOS, primarily from Sitka, Ketchikan, Haines, Skagway and Juneau. Many reports in the AKEPIC database from most communities, and also some other areas of human disturbance.
Madia glomerata	Tarweed	Collections from Haines and Skagway. Native to North America, the nearest other collections in e-Flora BC are a small number south and well inland of Southeast Alaska, with most collections being restricted to near the Canadian border with the lower-48. AKEPIC has it included on the non-native species list for Alaska (with a report from Haines).
Matricaria discoidea	Pineapple Weed	Although considered introduced by many sources, the FNA account indicates this species actually originates in northwestern North America and has spread from there. AKEPIC has it listed as an introduced species in the state. Only a few collections in ARCTOS (some under M. matricarioides). Many observations from throughout the region in the AKEPIC database. Occurrence away from areas of human disturbance is unclear.
Microseris borealis	Northern Microseris	A west coast endemic. Some patterns of occurrence unclear. For example, common in many Kruzof Island muskegs, but absent from muskegs along the Sitka road system, even though distance is not great. Well collected from southern outer islands, with a few more from southern inner islands. Two old collections from the Sitka area, and one more from the northern mainland along Icy Strait are the only others from the region (there are more from coastal areas north and west of the region). Probably under collected in part, but perhaps also prefers more hyper maritime climate?
Mycelis muralis	Wall-lettuce	A 2004 collection from the vicinity of Ketchikan is all that is in ARCTOS. Many reports of this species from the southern half of the region (not including Baranof Island) in the AKEPIC database.
Packera cymbalaria	Dwarf Arctic Ragwort	Despite occurring throughout much of the rest of Alaska (both interior, and more coastal areas at Kodiak Island and the Alaska Penninsula, in Southeast Alaska, this species is only known from the southern outer islands, where it's been collected on Prince of Wales (1979) and Coronation Island (1959). Perhaps this somewhat disjunct occurrence in southern Southeast Alaska (and Haida Gwaii) represents a refugial population that was separated from the main group during the last ice age?
Packera indecora	Elegant Groundsel	Five collections in ARCTOS, all from the northern part of the region. Two at Gustavus and two on the Yakutat Forelands. A 2012 collection at Hoonah is the only island record.
Packera ogotorukensis	Ogotoruk Creek Ragwort	Two collections from Southeast Alaska (Dall Island and Prince of Wales Island) are disjunct from the primary range of this species which is more northerly (including much of mainland Alaska). Is this species absent from much of Southeast Alaska, Rare, or overlooked and/or subject to misidentification?
Packera pauciflora	Rayless Alpine Butterweed	Based on ARCTOS records, the first collections of this species in the region appear to be two made in 1991 near Yakutat. Since that time there has been a third collection near Yakutat and an additional one from Glacier Bay. General range of these species seems to be more continental.
Packera paupercula	Balsam Groundsel	Two collections from the region in ARCTOS, one on the Chilkat Peninsula and another at Gustavus. (There are two additional collections from Prince of Wales Island that were previously identified as this species, but have reevaluated and given different names.) Overall distribution in the region is unclear.
Packera streptanthifolia	Rocky Mountain Groundsel	No collections in ARCTOS from Southeast Alaska. Collections there and on the e-flora BC maps suggest this species is primarily found on the landward side of the coastal mountains, and as such, is perhaps unlikely to be found in Southeast Alaska.
Packera subnuda	Queen Charlotte Butterweed	Collected from as far north as northern Prince of Wales and Coronation Island, it is also found on other southern outer islands. Endemic to area between northern end of Vancouver Island and southern Southeast Alaska.
Petasites frigidus	Arctic Sweet Coltsfoot	Presumed to occur throughout the region. Collections in ARCTOS are primarily from the mainland (but spanning south to north), with only a single collection from Coronation Island that is not on the mainland or a nearby island. Whether this is indicative of a preference for more continental influence resulting in a less common occurrence on outer islands is not clear.
Prenanthes alata	Western Rattlesnake-root	Fairly common plant of open areas. Found from sea level to subalpine meadows. Collections in ARCTOS from throughout (except Glacier Bay), including most of the major islands.
Saussurea americana	American Saw-wort	Only nine scattered collections in ARCTOS, with all but two from the year 2000 or later. Collected from Prince of Wales Island, Baranof Island, and Chichagof Island, as well as mainland collections near Juneau and the mountains between Lynn Canal and Glacier Bay. Only a few reports from British Columbia indicated on e-flora BC maps. It's unclear whether this species has been overlooked, or is simply uncommon (with more deliberate efforts to collect it when found in recent years).
Senecio jacobaea	Tansy Ragwort	May be spreading in the region, or perhaps had been overlooked. Most reports in AKEPIC from disturbed areas in southern Southeast Alaska. Additional collections in ARCTOS from Kruzof Island and Admiralty Island.
Senecio lugens	Black-tipped Ragwort	ARCTOS collections from the region are all from Prince of Wales Island, Dall Island, or Kosciusko Island. It appears that most (maybe all) of the collections are from limestone/karst areas. Overall the distribution of this species is more inland. There are some collections in the e-Flora BC maps from just over the border in the northern part of the region.
Senecio pseudoarnica	Seaside Ragwort	Collections in ARCTOS mostly from the northern outer part of the region, with a pair at Yakutat, two more on northern Chichagof Island, another two in Sitka Sound, and the only other one from down on Revillagigedo Island. Southeast Alaska is near the southern extent of this species range on the west coast of North America. There are collections from northern Haida Gwaii.
Senecio sheldonensis	Mt. Sheldon Groundsel	Not reported from the region - there is an observation from near the Haines highway on the BC side of the border.
Senecio triangularis	Arrow-leaf Ragwort	Presumably throughout the region. Collections in ARCTOS span the region, though some of the major islands do not have any associated collections.
Senecio viscosus	Sticky Ragwort	Based on reports in AKEPIC, this introduced species appears to be relatively common near Skagway, where it has been for some time (there is an ARCTOS collection from 1968). Additionally, single reports from Haines (in 2007), and Sitka (2008).
Senecio vulgaris	Common Groundsel	There a few collections of this introduced species in ARCTOS. Data in AKEPIC indicates it is established in several communities throughout much of the region.
Solidago lepida	Canada Goldenrod	Presumably present throughout, there are collections in ARCTOS from most of the region (though some are under S. canadensis and not S. lepida), but not the extreme south.
Solidago multiradiata	Northern Goldenrod	Expected to occur throughout. Collections in ARCTOS spanning most of the region with notable gaps including Admiralty Island and the southern inside Islands and mainland.
Solidago simplex	Sticky Goldenrod	No collections in ARCTOS or on e-Flora BC maps from Southeast Alaska. There are records from the Alsek River and near the Haines Highway not far from the border, so this species may occur at the margins in Southeast Alaska.
Sonchus arvensis	Field Sowthistle	This introduced species has been found in several communities throughout Southeast Alaska. It has also been found on northern Admiralty Island (at what are probably popular recreation sites for Juneau residents).
Sonchus asper	Spiny Sowthistle	Introduced species so far known from the southern part of the region. Collections in ARCTOS from Sitka and Wrangell, additional reports in AKEPIC from Kake, several locations across Prince of Wales Island, Ketchikan, and Metlakatla (though not from Wrangell or Sitka).
Sonchus oleraceus	Common Sowthistle	Introduced species reported (AKEPIC database) from a few communities in the southern half of the region including Sitka, Wrangell, Kake, Ketchikan, and Metlakatla.
Symphyotrichum boreale	Northern bog aster	The primary range of this species appears to be east of the coastal mountains. There is a single collection in ARCTOS identified as this species from Prince of Wales Island. There is a 2015 collection from Haines in the PNW Herbaria Consortium database.
Symphyotrichum foliaceum	Alpine Leafybract Aster	The Flora of North America treatments indicates that Symphyotrichum foliaceum var. foliaceum occurs in Southeast Alaska. There no mapped collections in ARCTOS identified (though some collections that are called Douglas Aster (Symphyotrichum subspicatum) are included under a search for S. foliaceum). The FNA treatment of S. subspicatum indicates that species "passes into" this one in Southeast Alaska.
Symphyotrichum subspicatum	Douglas Aster	Collections from throughout the region (mostly under Aster subspicatus). FNA indicates this species "passes into" Alpine Leafybract Aster (Symphyotrichum foliaceum) in Southeast Alaska.
Tanacetum bipinnatum	Common Tansy	Only known from north beach at Shelikof on Kruzof Island, where it has been collected in 2003 and 2013.
Tanacetum vulgare	Common Tansy	Introduced species. Only a few collections in ARCTOS, but (usually multiple) records from most communities in the region indicated in the AKEPIC database.
Taraxacum alaskanum	Alaska Dandelion	Collections of this species in ARCTOS from several islands (Hecata Island, Cornation Island, Baranof Island,Chichagof Island, and Admiralty Island as well as the northern mainland (from Juneau north).
Taraxacum ceratophorum	Horned Dandelion	A few collections in ARCTOS from Southeast Alaska including two from southern outer islands, one from the northern gulf coast, and two from the vicinity of Skagway.
Taraxacum officinale	Dandelion	Widespread throughout much of the region. Most common near towns and at locations with regular human impact, this species has also become naturalized in some remote locations, including shorelines, and stream-side sand and gravel bars.
Taraxacum scopulorum	Alpine Dandelion	The taxonomy seems a little tricky to tease out, but FNA account implies this species does not occur in Southeast Alaska. Could be plants previously identified as this species are Alaska Dandelion (Taraxacum alaskanum). Collections from Southeast Alaska in ARCTOS that come up in a search for this species are either called T. kamtschaticum which in the FNA account is synonymized uner T. alaskanum or T. alaskanum.
Tephroseris frigida	Arctic Groundsel	Apparently no collections of this species from the region, there are reports from northern British Columbia not far from the border. The overall range of this species is primarily north of Southeast Alaska, and if this species occurs in the region, it is likely only at the very northern margin.
Tephroseris lindstroemii	Northern Groundsel	No collections from Southeast Alaska, but there are three records mapped on e-Flora BC which are 25-30 miles from the border near the British Columbia border with Yukon along the Haines Highway.
Tephroseris palustris	Marsh Fleabane	No collections from Southeast Alaska. The nearest appears to be a single report from Atlin Lake in British Columbia.

Composite Family. Many species present in the Sitka area.