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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/1-8017/12-158811. Accessed 12 Jan. 2025.
Specimen Information
There are 115 specimens of this Species.
9957 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Fort Macleod
Date Collected1944-06-21
9958 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Wetaskiwin
Date Collected1929-06-14
40069 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Utikumasis Lake
Date Collected1968-07-08
27871 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, La Biche River
Date Collected1968-06-20
45838 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Indian Springs
Date Collected1969-07-05
24923 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Edmonton, University of Alberta
Date Collected1968-04-23
22512 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Lethbridge
Date Collected1958-06-22
45837 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Belly River
Date Collected1969-07-10
21362 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Vermilion
Date Collected1956-06-04
72506 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, RB Miller Biological Station
Date Collected1966-05-28
40393 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Chip Lake
Date Collected1970-06-18
40141 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Winagami Lake
Date Collected1968-07-06
85401 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Wagner Natural Area
Date Collected1974-06-03
85395 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Wagner Natural Area
Date Collected1974-05-27
46376 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Alberta, Elk Point
Date Collected1972-07-13
9959 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Manitoba, Cross Lake
Date Collected1948-07-09
22716 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Manitoba, Fort Garry
Date Collected1959-06-18
22715 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Saskatchewan, Tompkins
Date Collected1958-06-14
27537 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Manitoba, Whitemouth
Date Collected1968-06-08
41827 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Newfoundland and Labrador, St. John's
Date Collected1968-06-11
58062 - Thlaspi arvense L.
University of Alberta Vascular Plant Herbarium
Common Namepennycress, stinkweed (Moss, 1983).
Place CollectedNorth America: Canada, Ontario, St. Catharines
Date Collected1897-06-09