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Species Details
Draba nemorosa L.
University of Alberta Vascular Plant Herbarium Read more about this collection »
Leaves0.2-4.5 cm long and 0.1-2 cm wide; confined to lower third of stem; lance-shaped; toothed margin; bifid, trifid and cruciform hairs (Moss, 1983). Alternate (Johnson et al., 1995).
FlowersUnbranched, elongated inflorescence; matures bottom upwards (raceme); flowers yellow; 10-50 in cluster; sepals 2-2.5 mm long; hairless or simple hairs; petals 2.5-4 mm long (Moss, 1983).
Fruits and Seeds3-10 mm long; 1-2 mm wide; elliptical shape; hairless or slightly hairy (Moss, 1983).
Scientific Name
Draba nemorosa L.
Common Name
annual whitlow-grass; woods draba (Johnson et al., 1995).
General Description
An annual and weedy herb that grows from a slender taproot to form erect stems 2-35 cm tall with forked and star-shaped hairs; bears yellow flowers (Johnson et al., 1995).
Leaves
0.2-4.5 cm long and 0.1-2 cm wide; confined to lower third of stem; lance-shaped; toothed margin; bifid, trifid and cruciform hairs (Moss, 1983). Alternate (Johnson et al., 1995).
Flowers
Unbranched, elongated inflorescence; matures bottom upwards (raceme); flowers yellow; 10-50 in cluster; sepals 2-2.5 mm long; hairless or simple hairs; petals 2.5-4 mm long (Moss, 1983).
Fruits and Seeds
3-10 mm long; 1-2 mm wide; elliptical shape; hairless or slightly hairy (Moss, 1983).
Phenology
April to July (JSTOR).
Notes
2n=16* (Moss, 1983). There are 30 species of Draba in North America including:
Draba borealis: northern whitlow-grass
Draba stenoloba: slender whitlow-grass, Alaska draba
Draba crassifolia/Draba albertina: thick…
2n=16* (Moss, 1983). There are 30 species of Draba in North America including:
Draba borealis: northern whitlow-grass
Draba stenoloba: slender whitlow-grass, Alaska draba
Draba crassifolia/Draba albertina: thick leaved whitlow grass
Draba cana/Draba lanceolata: lance-leaved whitlow grass
Draba praealta: tall whitlow grass
Identification of the different species requires close examination of hairs on the leaves; they grow in cold and windy areas (Johnson et al., 1995). Flower buds are close to the basal rosette of leaves to keep them warm and accessible to cross-pollinating insects (Johnson et al., 1995). When summer progresses the stalk of the flower increases to improve chance of seed dispersal by wind (Johnson et al., 1995).
Range/Distribution
Alberta: Southern half of province and along eastern border to the north (Canadensys). CAN (BC, SK, MB, ON, QC, YT, NT, NU); USA (AK, WA, OR, CA, MT, ID, NV, WY, UT, CO, AZ, NM, ND, SD, NE, MN, IA, WI, MI) (USDA).
Citation
Page Citation for Draba nemorosa L.
Page Citation
"Species Details - Draba nemorosa L., University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/1-4782/12-102362. Accessed 07 Jul. 2024.
Specimen Information
There are 63 specimens of this Species.
111076 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Medicine Hat
Date Collected1978-06-16
114316 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Whitford Lake
Date Collected2004-06-13
116531 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: United States, Montana, Toole County, Sweet Grass Hills
Date Collected1976-06-06
118524 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Cold Lake
Date Collected2007-07-21
119104 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: United States, Montana, Missoula County, Pattee Canyon
Date Collected1962-04-25
57916 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Northwest Territories, Yellowknife
Date Collected1951-06-09
9740 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Northwest Territories, Fort Simpson
Date Collected1939-06-12
30781 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Northwest Territories, Wood Buffalo National Park
Date Collected1970-08-31
74629 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Northwest Territories, Yellowknife Bay
Date Collected1940-06-14
125390 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Beaverdam Lake
Date Collected1988-05-23
125391 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Pakowki Lake, Pakowki Lake Provincial Bird Sanctuary
Date Collected1966-05-06
125392 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Pakowki Lake, Pakowki Lake Provincial Bird Sanctuary
Date Collected1966-05-06
125393 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Pakowki Lake, Pakowki Lake Provincial Bird Sanctuary
Date Collected1966-05-06
125394 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Marshybank Ecological Reserve, Marshybank Lake
Date Collected1981-06-21
125395 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Fort Saskatchewan
Date Collected1978-06-07
125396 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Colin-Cornwall Lakes Wildland Provincial Park, Colin Lake
Date Collected2007-07-06
125397 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Colin-Cornwall Lakes Wildland Provincial Park
Date Collected2002-06
125975 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Hoadley
Date Collected2010-06-21
40675 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Lac La Biche, Big Island
Date Collected1971-06-04
45052 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Wainwright
Date Collected1973-05-19
72501 - Draba nemorosa L.
University of Alberta Vascular Plant Herbarium
Common Nameannual whitlow-grass; woods draba (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Kananaskis Country, Peter Lougheed Provincial Park, Missinglink Mountain
Date Collected1966-06-08