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Species Details
Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium Read more about this collection »
LeavesEgg-shaped; drooping; middle and upper leaves sessile; clasping; margin entire or toothed (Moss, 1983). 1.5-7 cm long; fall off quickly (Johnson et al., 1995). Hairless; ear-shaped at base (E-Flora BC).
FlowersUnbranched elongated inflorescence; mature bottom upwards (raceme); small, white flowers; petals 3-4 mm long (Moss, 1983). Stalks 3-15 mm long (Johnson et al., 1995).
Fruits and SeedsDry dehiscent pods (silicles); flat; rounded; 1-2 cm long; winged; notched at apex; 2-8 seeds per locule; black with concentric ridges (Moss, 1983). Pods heart-shaped (Johnson et al., 1995).
Scientific Name
Thlaspi arvense L.
Common Name
pennycress, stinkweed (Moss, 1983).
General Description
A hairless, yellow-green annual herb that grows from a taproot to a height of 20-50 cm tall to bear white flowers (Johnson et al., 1995); turns yellow after flowering (Moss, 1985).
Leaves
Egg-shaped; drooping; middle and upper leaves sessile; clasping; margin entire or toothed (Moss, 1983). 1.5-7 cm long; fall off quickly (Johnson et al., 1995). Hairless; ear-shaped at base (E-Flora BC).
Flowers
Unbranched elongated inflorescence; mature bottom upwards (raceme); small, white flowers; petals 3-4 mm long (Moss, 1983). Stalks 3-15 mm long (Johnson et al., 1995).
Fruits and Seeds
Dry dehiscent pods (silicles); flat; rounded; 1-2 cm long; winged; notched at apex; 2-8 seeds per locule; black with concentric ridges (Moss, 1983). Pods heart-shaped (Johnson et al., 1995).
Phenology
March to August (JSTOR).
Notes
2n=14* (Moss, 1983). This species was introduced to North America by Europeans (Johnson et al., 1995). Seeds contain mustard oil (isothiocyanate); cattle have been poisoned by eating contaminated hay; dairy products…
2n=14* (Moss, 1983). This species was introduced to North America by Europeans (Johnson et al., 1995). Seeds contain mustard oil (isothiocyanate); cattle have been poisoned by eating contaminated hay; dairy products and meat can be tainted if cattle consume it (Johnson et al., 1995). Seeds have been used for flavouring but this is not wise; young leaves have been used in salads; leaves have a rank odour if crushed (Johnson et al., 1995).
Range/Distribution
Alberta: Predominantly in the southern half of the province (Canadensys). Introduced in CAN (BC, SK, MB, ON, QC, NL, NS, NB, PE, YT, NT); USA (AK, AZ, AR, CA, CO, CT, DE, FL, GA, ID, IL, IN, IA, KS, KY, LA, ME, MD,…
Alberta: Predominantly in the southern half of the province (Canadensys). Introduced in CAN (BC, SK, MB, ON, QC, NL, NS, NB, PE, YT, NT); USA (AK, AZ, AR, CA, CO, CT, DE, FL, GA, ID, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, MN, MS, MO, MT, NE, NV, NH, NJ, NM, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY) (USDA).
Citation
Page Citation for Thlaspi arvense L.
Page Citation
"Species Details - Thlaspi arvense L., University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/1-8017/12-120858. Accessed 05 Oct. 2024.
Specimen Information
There are 115 specimens of this Species.
138030 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Witt Property
Date Collected2010-07-03
137726 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Witt Property
Date Collected2010-07-04
135828 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Ontario, Ottawa
Date Collected1964-06-17
138836 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Jasper National Park, Pocahontas
Date Collected1971-07-30
138837 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Jasper National Park, Maligne Lake
Date Collected1971-09-15
139536 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Hay Lakes
Date Collected2015-07-17
140086 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Setaspell Outpost
Date Collected2016-07-23
141071 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, May Hill
Date Collected2016-06-24
142036 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Edmonton
Date Collected2017-08-26
144101 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Edmonton
Date Collected1964-07-07