Draba nivalis
Snow draba (Draba nivalis): Although it was included on the preliminary checklist, there are no records of this species from the region that are georeferenced in ARCTOS, nor any that show up on e-Flora BC map. The overall range of this species is almost entirely north and/or west of Southeast Alaska. One observation on iNaturalist identified as this [1]
ID notes from FNA treatment: Draba nivalis is most often confused with D. lonchocarpa, and C. L. Hitchcock (1941) reduced the latter to a variety (var. elongata) of D. nivalis. A critical comparison reveals that there are enough differences to warrant their recognition as distinct species. Draba nivalis is distinguished by having non-ciliate leaf bases, basal leaf blades pubescent with trichomes 0.05-0.15 mm, stems and pedicels that are always pubescent, and fruits that are elliptic to narrowly elliptic-oblong, plane, and 3.5-9 mm. By contrast, D. lonchocarpa has ciliate leaf bases, basal leaf blades pubescent with trichomes 0.15-0.5 mm, stems and pedicels that are glabrous or sparsely pubescent, and fruits that are linear to lanceolate or oblong, slightly twisted or plane, and 6-15(-18) mm. Except for Alaska, D. nivalis does not grow in the continental United States, whereas D. lonchocarpa grows in nearly all Mountain and Pacific states.
Local Notes
References
Weblinks
- FNA page for Draba nivalis "Rock outcrops and fellfields, meadows, open tundra, stream banks, gravelly beaches, roadsides;"
- USDAPLANTS page for Draba nivalis
- e-FloraBC page for Draba nivalis
- PacNW Herbaria Records for Draba nivalis
- Search Arctos Database for Draba nivalis (Southeast only)
- Search Arctos Database for Draba nivalis (entire database)
- Encyclopedia of Life search for Draba nivalis
- iNaturalist Observations for Draba nivalis in Southeast Alaska
Other References
- Muller: NE; dry mountains, alpine
- Hall 2010: (included under D. lactea along with Lance-pod draba (Draba lonchocarpa))
