Thalictrum venulosum Trel.
veiny meadowrue (veiny meadow-rue)
Ranunculaceae (Buttercup family)
Introduction to Vascular Plants
veiny meadowrue (veiny meadow-rue)
Ranunculaceae (Buttercup family)
Introduction to Vascular Plants
Species Information
General:
Perennial herb from a rhizome; stems erect, 20-70 cm tall, smooth.
Leaves:
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.
Flowers:
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.
Fruits:
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.
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 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)
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) |
1536 | 400 | 2280 |
| Slope
Gradient (%) |
25 | 0 | 90 |
|
Aspect (degrees) |
106 | 4 | 340 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
4 | 1 | 7 |
| Modal
Nutrient Regime
Class |
C | ||
| #
of field plots species was recorded in: |
124 | ||
| Modal
BEC Zone Class |
ESSF | ||
|
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) | ||
|
Source:
Klinkenberg 2013
|
|||
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.Status Information
Synonyms
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