Equisetaceae

Family: Equisetaceae

Group: Vascular Plant, Species

Scientific Name	Common Name	Summary
Equisetum arvense	Common Horsetail	Almost certainly common throughout the region in open or disturbed areas from low elevation to the subalpine. Extensive areas of the region have few or no collections of this species (perhaps because of its ubiquity).
Equisetum fluviatile	Swamp Horsetail	Expected throughout the region. Probably more widespread than collections (scattered, mostly on the mainland) may indicate. May be abundant where it grows in shallow waters or marshy habitats.
Equisetum hyemale	Common Scouring-rush	Expected throughout the region, though apparently very few collections (note: Arctos has E. hiemale for some records; and many that are not georeferenced that may include SE Alaska material).
Equisetum palustre	Marsh Horsetail	Expected throughout the region (FNA Range map), this species has apparently only been collected from a few scattered locations on the mainland in Southeast Alaska (pending review of many non-georeferenced records in Arctos).
Equisetum pratense	Meadow Horsetail	Expected throughout the region (FNA map), but apparently very few collections (pending review of non-georeferenced arctos records). Has been reported from Coronation Island and Chichagof Island.
Equisetum scirpoides	Dwarf Scouringrush	Expected to occur on the northern mainland and outer islands (FNA map). Apparently few, if any, collections from the region (pending review of non-georeferenced records in Arctos)
Equisetum sylvaticum	Woodland horsetail	Expected on northern mainland and southern outer islands (FNA map). Few collections from the region (pending review of many non-georeferenced arctos records).
Equisetum telmateia	Giant Horsetail	Expected on the outer islands (FNA map), it is unclear on what basis this inclusion was made. Reported from Haida Gwaii south of the region, but no reports of this species in Southeast Alaska have yet been discovered.
Equisetum variegatum	Variegated Scouring-rush	Found throughout with several collections made from throughout the region. Scattered in occurrence but sometimes abundant where it is found.
Equisetum x litorale	Horsetail Hybrid	Expected throughout the region (FNA map) it is unclear how often this hybrid between E. arvense and E. fluviatile occurs.