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Species Details
Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium Read more about this collection »
LeavesBasal leaves lance-shaped; slightly toothed margin; 1-6 cm long; hairy; 3-rayed trichomes; stem leaves egg to lance-shaped; toothed margin shaped like an arrowhead; smooth (Moss, 1983). Rosette at stem base; 3-8 mm wide; pointed tip; stem leaves smaller; stalkless; clasp stem (Johnson et al., 1995).
FlowersPink to purple petals; 6-10 mm long (Moss, 1983). Cluster at stem tip; 4 petals (Johnson et al., 1995).
Fruits and SeedsDehiscent pod (silique); ascending at 45 degrees or spreading; 2-8 cm long; seeds egg-shaped; narrowly winged (Moss, 1983).
Scientific Name
Arabis divaricarpa A. Nels.
Common Name
purple rock cress
General Description
A biennial or perennial plant that has simple or branching, hairless to sparsely hairy stems 40-80 cm tall; bears pink to purple flowers (Moss, 1983).
Leaves
Basal leaves lance-shaped; slightly toothed margin; 1-6 cm long; hairy; 3-rayed trichomes; stem leaves egg to lance-shaped; toothed margin shaped like an arrowhead; smooth (Moss, 1983). Rosette at stem base; 3-8 mm wide;…
Basal leaves lance-shaped; slightly toothed margin; 1-6 cm long; hairy; 3-rayed trichomes; stem leaves egg to lance-shaped; toothed margin shaped like an arrowhead; smooth (Moss, 1983). Rosette at stem base; 3-8 mm wide; pointed tip; stem leaves smaller; stalkless; clasp stem (Johnson et al., 1995).
Flowers
Pink to purple petals; 6-10 mm long (Moss, 1983). Cluster at stem tip; 4 petals (Johnson et al., 1995).
Fruits and Seeds
Dehiscent pod (silique); ascending at 45 degrees or spreading; 2-8 cm long; seeds egg-shaped; narrowly winged (Moss, 1983).
Phenology
May to July (JSTOR).
Notes
2n=14, 21, 28 (Moss, 1983). Rock cresses have been eaten in salads or sandwiches; they have been cooked as a potherb; they have been combined with eggs, cheese or in potato soup (Johnson et al., 1995).
Similar…
2n=14, 21, 28 (Moss, 1983). Rock cresses have been eaten in salads or sandwiches; they have been cooked as a potherb; they have been combined with eggs, cheese or in potato soup (Johnson et al., 1995).
Similar species:
Arabis drummondii: Drummond's rock cress; has wider pods and seeds in 2 rows (Johnson et al., 1995).
Range/Distribution
Alberta: SW along mountain range and in central-southern half of province (Canadensys). CAN (BC, SK, MB, ON, QC, NL, NS, YT, NT); USA (AK, WA, OR, CA, MT, ID, NV, UT, WY, CO, NM, ND, SD, NE, MN, WI, IA, MI, OH, NY,…
Alberta: SW along mountain range and in central-southern half of province (Canadensys). CAN (BC, SK, MB, ON, QC, NL, NS, YT, NT); USA (AK, WA, OR, CA, MT, ID, NV, UT, WY, CO, NM, ND, SD, NE, MN, WI, IA, MI, OH, NY, VT, ME, NH) (USDA).
Citation
Page Citation for Arabis divaricarpa A. Nels.
Page Citation
"Species Details - Arabis divaricarpa A. Nels., University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/1-5054/12-117088. Accessed 30 Jan. 2025.
Specimen Information
There are 72 specimens of this Species.
40619 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Goodwin Lake
Date Collected1971-06-04
57742 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Banff National Park, Sulphur Mountain
Date Collected1899-07-14
55823 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Wood Buffalo National Park, Revillon Coupe
Date Collected1970-07-01
80300 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Nevis
Date Collected1973-05-25
80299 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Hand Hills
Date Collected1975-06-18
82445 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Waterton Lakes National Park, Dardanelles
Date Collected1970-06-10
57739 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Nose Hill
Date Collected1950-07-18
58177 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Fort Saskatchewan
Date Collected1941-07-25
40686 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, North Buck Lake
Date Collected1971-06-03
58176 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Scotford
Date Collected1942-05-21
82450 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Waterton Lakes National Park, Crandell Lake
Date Collected1969-07-21
9374 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Whiskey Gap
Date Collected1941-05-17
9371 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Waterton Lakes National Park, Cameron Creek
Date Collected1953-07-17
23655 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Lakeland Provincial Recreation Area, Touchwood Lake
Date Collected1967-06-24
58174 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Fort Saskatchewan
Date Collected1936-05-30
9379 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Edmonton
Date Collected1938-09-01
54257 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Steveville
Date Collected1970-05
41539 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Banff National Park, Redearth Creek
Date Collected1967-07-01
45459 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Jasper National Park, Vine Creek
Date Collected1970-06-09
40543 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Jasper National Park, Willow Creek
Date Collected1971-06-19
28964 - Arabis divaricarpa A. Nels.
University of Alberta Vascular Plant Herbarium
Common Namepurple rock cress
Place CollectedNorth America: Canada, Alberta, Lac La Biche, Big Island
Date Collected1970-05-31