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

Thalictrum dasycarpum Fisch. & Avé-Lall.
purple meadowrue (purple meadow-rue)
Ranunculaceae (Buttercup family)

Introduction to Vascular Plants

© Frank Lomer  Email the photographer   (Photo ID #27562)

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Distribution of Thalictrum dasycarpum
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Species Information

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Dioecious perennial herb from a rhizome; stems erect, stout, 40-150 cm tall, simple or branched, hollow; plants smooth or sparsely minutely-hairy.
Mostly stem leaves, alternate, the basal and lower stem leaves stalked, 3- to 5-times 3-parted, the leaflets brownish-green, dark green or bright green above, paler, prominently veined, and hairy and/or pimply with minute glands below, leathery, egg-shaped, 15-60 mm long, 8-45 mm wide, the length 1- to 2.5-times width, the tips undivided or 2- to 5-pointy- or bluntly-lobed, margins often rolled under, the upper stem leaves unstalked; stalks smooth or sometimes hairy and/or glandular-hairy.
Inflorescence a many-flowered, pyramidal panicle, the flowers unisexual, male and female flowers on separate plants; all flower stalks usually smooth, rarely hairy or glandular-hairy; petals absent; sepals 4 (-6), whitish, lanceolate, 3-5 mm long; stamens 18-25, the filaments white to purplish, threadlike, 2-6.5 mm long, the anthers 1-3.6 mm long, sharp-pointed.
Achenes, about 10, egg- to spindle-shaped, 2-4.6 mm long, strongly veined, usually hairy and/or glandular, unstalked or stalks to 1 mm long; beaks often deciduous, spindle-shaped, 1.5-4.5 mm long, straight.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet meadows, streambanks and woodlands in the montane zone; rare in SE BC; E to NB and NS and S to LA, FL, NM, AZ and NE WA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Thalictrum dasycarpum

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




Elevation (metres) 1677 1845 2013
Slope Gradient (%) 2 19 37
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
71 15 320
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 4 4
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: AT(2)


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

Thalictrum dasycarpum var. hypoglaucum (Rydb.) B. Boivin
Thalictrum hypoglaucum Rydb.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References