E-Flora BC: Electronic Atlas of the Flora of British Columbia

Descurainia sophia (L.) Webb ex Prantl
flixweed (herb sophia)
Brassicaceae (Mustard family)

Introduction to Vascular Plants

© Paul Handford  Email the photographer   (Photo ID #65404)

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Distribution of Descurainia sophia
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Species Information

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General:
Annual or biennial herb from a taproot; stems 30-100 cm tall, usually branched above, occasionally from the base; finely starlike-hairy, often greyish, sometimes with some simple hairs.
Leaves:
Basal leaves few; stem leaves very deeply twice or thrice pinnately lobed to twice or thrice compound, oblanceolate to widely egg-shaped, short-stalked, 2-10 cm long, ultimate lobes of leaves generally linear.
Flowers:
Racemes elongated; flower stalks slender, ascending, 7-14 mm long, less than half the length of the siliques; petals pale yellow, needle-like, spoon-shaped, about length of sepals; sepals 2-2.5 mm long, greenish or yellowish.
Fruits:
Siliques, nearly erect, linear, 11-33 mm long, 1-1.5 mm wide, inconspicuously constricted between the seeds, rounded at tip; seeds (12) 15-25 per chamber in one row, 0.7-1.5 mm long, oblong-elliptic.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry fields and waste places in the lowland, steppe and montane zones; frequent throughout BC except Queen Charlotte Islands and adjacent coast; introduced from Eurasia.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Descurainia sophia

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

Minimum

Average

Maximum

Elevation (metres) 184 782 1708
Slope Gradient (%) 0 23 100
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
12 187 340
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 7
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
76
Modal BEC Zone Class
BG
All BEC Zones (# of stations/zone) species was recorded in: BG(46), ESSF(4), IDF(14), MS(1), PP(5), SBPS(3)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Sisymbrium sophia L.
Sophia sophia (L.) Britton

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References