Burke: Thalictrum pubescens vs. Thalictrum occidentale

	Thalictrum pubescens	Thalictrum occidentale
		western meadow rue
Habit		Dioecious, glabrous to glandular-puberulent perennial, the stems 4-10 dm. tall.
Leaves		Leaves mostly cauline, 3-4 times ternate, the leaflets obovate, 1.5-3 cm. long, rounded at the base, 3-lobed, the lobes entire or shallowly 2- or 3-toothed.
Flowers		Inflorescence an open, leafy-bracteate panicle; sepals 4-5, 2-3 mm. long, greenish-white to purplish; petals none; stamens 15-30, the filaments filiform, 4-8 mm. long, purplish; ovaries glandular-puberulent; stigmas purplish, 3-4.5 mm. long; ovary superior.
Fruits		Achenes 4-9, spreading, 5-8 mm. long, with 3 prominent nerves on each side.

	Thalictrum pubescens	Thalictrum occidentale
Flowering time		May-August
Habitat		Shady woodlands and forests, from low elevations to mid-elevations in the mountains.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring on both sides of the Cascades crest in Washington; Yukon Territory to northern California, east to Montana and Colorado. [WildflowerSearch map] [BONAP county map]
Origin		Native
Conservation status		Not of concern
Sibling taxa	T. dasycarpum, T. occidentale, T. venulosum	T. dasycarpum, T. venulosum
Web links	Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Thalictrum pubescens

Thalictrum occidentale

western meadow rue

Habit

Dioecious, glabrous to glandular-puberulent perennial, the stems 4-10 dm. tall.

Leaves

Leaves mostly cauline, 3-4 times ternate, the leaflets obovate, 1.5-3 cm. long, rounded at the base, 3-lobed, the lobes entire or shallowly 2- or 3-toothed.

Flowers

Inflorescence an open, leafy-bracteate panicle;

sepals 4-5, 2-3 mm. long, greenish-white to purplish;

petals none;

stamens 15-30, the filaments filiform, 4-8 mm. long, purplish;

ovaries glandular-puberulent;

stigmas purplish, 3-4.5 mm. long;

ovary superior.

Fruits

Achenes 4-9, spreading, 5-8 mm. long, with 3 prominent nerves on each side.