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Species Details
Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium Read more about this collection »
LeavesBasal leaves short petiole; hairy; stem leaves egg to lance-shaped; sessile; margin entire or toothed; lower stem leaves hairy (Moss, 1983). Basal leaves in rosette; 1.5-8 cm long; 5-15 stem leaves; alternate; 1-7 cm long (Johnson et al., 1995).
FlowersUnbranched, elongated inflorescence; flowers mature bottom upwards (raceme); raceme slender; petals white to yellowish; 3-5 mm long (Moss, 1983). Greenish-pink; up to 8 mm long (Johnson et al., 1995).
Fruits and SeedsDehiscent pod (silique); erect and flat; 3-5 cm long; valve 1-nerved to the middle; seeds in 1 row; winged (Moss, 1983).
Scientific Name
Arabis hirsuta (L.) Scop.
Common Name
hairy rock cress (Johnson et al., 1995).
General Description
A biennial or perennial herb that grows 1 to several slender, hairy and unbranched stems 20-70 cm tall; bears white to yellow or greenish-pink flowers (Johnson et al., 1995).
Leaves
Basal leaves short petiole; hairy; stem leaves egg to lance-shaped; sessile; margin entire or toothed; lower stem leaves hairy (Moss, 1983). Basal leaves in rosette; 1.5-8 cm long; 5-15 stem leaves; alternate; 1-7 cm long…
Basal leaves short petiole; hairy; stem leaves egg to lance-shaped; sessile; margin entire or toothed; lower stem leaves hairy (Moss, 1983). Basal leaves in rosette; 1.5-8 cm long; 5-15 stem leaves; alternate; 1-7 cm long (Johnson et al., 1995).
Flowers
Unbranched, elongated inflorescence; flowers mature bottom upwards (raceme); raceme slender; petals white to yellowish; 3-5 mm long (Moss, 1983). Greenish-pink; up to 8 mm long (Johnson et al., 1995).
Fruits and Seeds
Dehiscent pod (silique); erect and flat; 3-5 cm long; valve 1-nerved to the middle; seeds in 1 row; winged (Moss, 1983).
Phenology
April to July (JSTOR).
Notes
2n=16, 18, 32 (Moss, 1983). In Alberta also known as spp. pycnocarpa (Moss, 1983). Rock cress species have been eaten but hairy species have only been consumed after cooking (Johnson et al., 1995). Also known as…
2n=16, 18, 32 (Moss, 1983). In Alberta also known as spp. pycnocarpa (Moss, 1983). Rock cress species have been eaten but hairy species have only been consumed after cooking (Johnson et al., 1995). Also known as Arabis hirsuta var, eschscholtziana (E-Flora BC).
Range/Distribution
Alberta: Predominantly southern half of province but scattered occurrences in the northern part of the province (Canadensys). CAN (BC, MB, SK, ON, QC, NB, NS, YT, NT); USA (AK, WA, OR, CA, MT, ID, NV, WY, UT, CO, AZ,…
Alberta: Predominantly southern half of province but scattered occurrences in the northern part of the province (Canadensys). CAN (BC, MB, SK, ON, QC, NB, NS, YT, NT); USA (AK, WA, OR, CA, MT, ID, NV, WY, UT, CO, AZ, NM, ND, SD, NE, KS, MN, IA, MO, AR, WI, IL, MI, IN, KY, TN, OH, GA, NC, VA, WV, NY, PA, NJ, CT, MA, VT, NH, ME) (USDA).
Citation
Page Citation for Arabis hirsuta (L.) Scop.
Page Citation
"Species Details - Arabis hirsuta (L.) Scop., University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/1-8605/12-117230. Accessed 11 Jan. 2025.
Specimen Information
There are 63 specimens of this Species.
113369 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Coyote Lake Natural Area
Date Collected1988-06-07
115912 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, University of Alberta Woodbend Field Station
Date Collected2006-05-19
119245 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Rumsey Ecological Reserve
Date Collected1997
119246 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Rumsey Ecological Reserve
Date Collected1997
121949 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Kootenay Plains Ecological Reserve
Date Collected2009-06-16
9421 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Northwest Territories, Fort Simpson
Date Collected1939-06-12
57767 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Northwest Territories, Yellowknife Bay
Date Collected1949-06-27
125553 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Elkhorn Stock Ranch
Date Collected2007-08-17
125272 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, David Lake
Date Collected1981-05-27
125273 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Brazeau River
Date Collected1981-06-18
125275 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Kootenay Plains
Date Collected1981-06-21
125276 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Porcupine Hills
Date Collected1981-07-02
125278 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Ross Lake Natural Area
Date Collected1985-05-23
40645 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Cooking Lake
Date Collected1970-06-10
42042 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Lakeland Provincial Recreation Area, Touchwood Lake
Date Collected1971-06-05
82420 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Kleskun Hill
Date Collected1979-06-09
80303 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Vermilion
Date Collected1974-07-01
80302 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Stettler
Date Collected1974-06-25
57774 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Calgary
Date Collected1953-07-24
37403 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Carbondale River
Date Collected1944-07-09
23312 - Arabis hirsuta (L.) Scop.
University of Alberta Vascular Plant Herbarium
Common Namehairy rock cress (Johnson et al., 1995).
Place CollectedNorth America: Canada, Alberta, Long Lake Provincial Park
Date Collected1967-07-25