Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium Read more about this collection »

LeavesBasal leaves divided into leaflets twice (bipinnate); greenish; hairless or slightly hairy; upper leaves less divided; segments narrow (Moss, 1983). Gland-tipped hairs (Johnson et al., 1995). FlowersUnbranched, elongated inflorescence; matures bottom upwards (raceme); stalks 6-12 mm long; petals yellow; 2-3 mm long; sepals 1.5-2.5 mm long (E-Flora BC). Fruits and SeedsDry dehiscent pod (silique); 6-13 mm long; 1-2 mm wide; stalks divergent and 6-13 mm long (Moss, 1983). Seeds in 2 rows (E-Flora BC).

Scientific Name Descurainia pinnata (Walter) Britton Common Name green tansy mustard (Johnson et al., 1995). General Description An annual herb that has simple or slightly branched stems that grow 20-60 cm tall and are slightly hairy; they bear yellow flowers (Moss, 1983; E-Flora BC). Leaves Basal leaves divided into leaflets twice (bipinnate); greenish; hairless or slightly hairy; upper leaves less divided; segments narrow (Moss, 1983). Gland-tipped hairs (Johnson et al., 1995). Flowers Unbranched, elongated inflorescence; matures bottom upwards (raceme); stalks 6-12 mm long; petals yellow; 2-3 mm long; sepals 1.5-2.5 mm long (E-Flora BC). Fruits and Seeds Dry dehiscent pod (silique); 6-13 mm long; 1-2 mm wide; stalks divergent and 6-13 mm long (Moss, 1983). Seeds in 2 rows (E-Flora BC). Phenology March to April (JSTOR). Notes 2n=14, 28*, 42 (Moss, 1983). This is a native species but has weed-like tendencies (Johnson et al., 1995). Range/Distribution

Alberta: SW along mountain range (Canadensys). CAN (BC, MB,NS, SK, NT, ON, QC, YT); USA (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,…

Page Citation

"Species Details - Descurainia pinnata (Walter) Britton, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/1-5320/12-111717. Accessed 09 May. 2025.

15 results plotted on map in 14 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

118365 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Kootenay Plains Ecological Reserve, Two O'Clock Creek Date Collected2007-07-10

125332 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Battle River Date Collected1982-07-21

125333 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Auburndale Date Collected1983-07-28

110343 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Medicine Hat Date Collected1978-06-15

72510 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Kananaskis Country, Peter Lougheed Provincial Park, Missinglink Mountain Date Collected1966-06-22

72511 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Kananaskis Highway Date Collected1966-06-30

79271 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Kananaskis Country, Peter Lougheed Provincial Park, Lower Kananaskis Lake Date Collected1977-06-25

79626 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Kananaskis Country, Mount Wintour Date Collected1977-05-26

19600 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: United States, Oklahoma, Payne County, Stillwater Date Collected1957-04-09

39034 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, North Kootenay Mountain Date Collected1971-07-16

37929 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Waterton Lakes National Park Date Collected1971-06-17

56580 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Rock Creek Date Collected1975-06-25

45827 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Waterton Lakes National Park, Twin Lakes Date Collected1969-07-29

30956 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Fort Macleod Date Collected1971-06-10

105810 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Suffield Training Area Date Collected1995-06-14

105809 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Suffield Training Area Date Collected1995-06-05

9615 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Pincher Creek Date Collected1940-06-18

57889 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: United States, Oregon, Wallowa County, Wallowa Lake Date Collected1939-06-02

136938 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Sommerfeldt Ranch Date Collected1994-05-28/1994-05-29

138674 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Jasper National Park, Maligne Lake Date Collected1971-07-11

140152 - Descurainia pinnata (Walter) Britton

University of Alberta Vascular Plant Herbarium

Common Namegreen tansy mustard (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Setaspell Outpost Date Collected2017-05-30

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