Thalictrum venulosum Trel.
veiny meadowrue (veiny meadow-rue)
Ranunculaceae (Buttercup family)

Introduction to Vascular Plants


© Jamie Fenneman     (Photo ID #29624)


E-Flora BC Static Map

Distribution of Thalictrum venulosum
Click here to view the full interactive map and legend

Species Information

Perennial herb from a rhizome; stems erect, 20-70 cm tall, smooth.
Stem leaves 1 to 3, alternate, the basal and lower stem leaves stalked, 3- to 4-times 3-parted, the leaflets thick, circular to egg-shaped, 5-20 mm long, the tips 3- to 5-lobed, the lobes round-toothed, prominently veined and smooth or glandular-hairy below; stem leaves subtending panicle branches unstalked.
Inflorescence a many-flowered, narrow, terminal raceme, the bracts small, the flowers unisexual, male and female flowers on separate plants; flower stalks ascending; petals absent; sepals 4 (-6), greenish-white, lanceolate to broadly egg-shaped or elliptic, 2-4 mm long; stamens 10-20, the filaments coloured, not white, threadlike, 3-5.5 mm long, the anthers 2-3.5 mm long, blunt to pointy-tipped; stigmas usually yellowish.
Achenes, 5-17, erect to spreading, curved, elliptic-oblong, 3-4 mm long, round to slightly flattened, smooth to glandular, distinctly longitudinally veined, stalks 0.1-0.3 mm long; beaks 1.5-2.5 mm long.

SourceThe Illustrated Flora of British Columbia


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.


Ecological Framework for Thalictrum venulosum

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)
1536 400 2280
Slope Gradient (%)
25 0 90

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

106 4 340
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 1 7
Modal Nutrient Regime
# of field plots
 species was recorded in:
Modal BEC Zone Class

All BEC Zones (# of stations/zone) species was recorded in

AT(4), BAFA(1), BWBS(9), ESSF(48), ICH(11), IDF(6), MS(28), SBS(6)

Habitat and Range

Moist to mesic meadows, grassy slopes, thickets and open forests in the steppe and montane zones; frequent in BC east of Coast-Cascade Mountains; N to YT and NT, E to PQ and S to MN, WI, SD, WY and OR.

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Thalictrum columbianum
Thalictrum confine Fern.
Thalictrum confine var. columbianum (Rydb.) B. Boivin
Thalictrum confine var. greeneanum Boivin
Thalictrum occidentale var. columbianum (Rydb.) M. Peck
Thalictrum turneri B. Boivin
Thalictrum venulosum var. confine (Fern.) Boivin
Thalictrum venulosum var. fissum (Greene) Boivin
Thalictrum venulosum var. lunellii (Greene) Boivin
Thalictrum venulosum var. turneri (Boivin) Boivin
Thalictrum venulosum var. venulosum