Descurainia sophioides (Fisch. ex Hook.) O.E. Schulz
northern tansy mustard (northern tansymustard)
Brassicaceae (Mustard family)
Introduction to Vascular Plants
northern tansy mustard (northern tansymustard)
Brassicaceae (Mustard family)
Introduction to Vascular Plants
Species Information
General:
Annual or sometimes biennial herb from a taproot; stems 10-150 cm tall; sparsely to densely hairy with starlike and stalked-glandular hairs.
Leaves:
Basal leaves few; stem leaves deeply once to thrice compound below, becoming once or twice pinnately compound above, 2-12 cm long, segments oblong to oblanceolate, 1-2 mm wide.
Flowers:
Racemes clustered at the top; flowers stalks spreading-ascending, often curved, 1-9 mm long, less than half the length of the siliques; petals yellowish, about length of sepals; sepals 1.5-2 mm long, yellowish.
Fruits:
Siliques, spreading-ascending, 16-33 mm long, 0.7-1 mm wide; style to 0.2 mm long; seeds in one row.
Illustration
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration Source: The Illustrated Flora of British Columbia
Ecology
Ecological Framework for Descurainia sophioides
The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)
The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)
| Site Information |
Value / Class |
||
|
Avg |
Min |
Max |
|
| Elevation
(metres) |
922 | 304 | 1828 |
| Slope
Gradient (%) |
43 | 0 | 75 |
|
Aspect (degrees) |
175 | 90 | 275 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
1 | 1 | 3 |
| Modal
Nutrient Regime
Class |
A | ||
| #
of field plots species was recorded in: |
8 | ||
| Modal
BEC Zone Class |
BG | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
BG(5), BWBS(2), ESSF(1) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Moist to mesic roadsides, disturbed areas and waste places in the montane zone; rare in N BC; amphiberingian, N to AK, YT and NT and E to N to MB; E. Asia.Status Information
Synonyms
Synonyms and Alternate Names:
Sisymbrium sophioides Fisch. ex Hook.