Burke: Anemone oregana vs. Anemone deltoidea

	Anemone oregana	Anemone deltoidea
	Oregon anemone, Oregon windflower	threeleaf anemone, Columbian windflower
Habit	Perennial from scaly, stout, horizontal rhizomes, the flowering stems 1-3 dm. tall.	Herbaceous perennial from slender, horizontal rhizomes, the flowering stems 1-3 dm. tall, glabrous to stiff-hairy.
Leaves	Basal leaves single, trifoliate, the leaflets once or twice shallowly lobed and remotely serrate; the flowering stem naked except for a whorl of 3 leaves near the top, these trifoliate, petiolate, the leaflets up to 8 cm. long, the lateral pair deeply lobed, all remotely toothed.	Basal leaves usually solitary, the blade tri-foliate, the leaflets short-petiolate, ovate, with coarse, rounded teeth, usually glabrous; the 3 involucral leaves simple, up to 8 cm. long, very similar to the leaflets of the basal leaves.
Flowers	Flowers single; sepals usually 5, ovate-oblong, 12-20 mm. long, usually blue to blue-violet, but occasionally white or pinkish; petals none; stamens 35-100; pistils numerous.	Flowers solitary; sepals usually 5, white, ovate to oblanceolate, 1.5-2.5 cm. long, glabrous; petals none; stamens and pistils numerous; style shorter than the achene.
Fruits	Achenes narrowly oblong, 4 mm. long, finely pubescent; style 0.5 mm. long, glabrous.	Achene swollen, ovate, 2.5-4 mm. long.

	Anemone oregana	Anemone deltoidea
Flowering time	March-June	April-May
Habitat	Moist, open woods, low to mid-elevations in the mountains, also in marshes and bogs along the coast.	Dry to moist woodlands at low to middle elevations.
Distribution	Occurring in forested areas on both sides of the Cascades crest in Washington; Washington to northern California. [WildflowerSearch map] [BONAP county map]	Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; Washington to California. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Not of concern
Sibling taxa	A. deltoidea, A. drummondii, A. lyallii, A. multifida, A. occidentalis, A. parviflora, A. patens, A. piperi	A. drummondii, A. lyallii, A. multifida, A. occidentalis, A. oregana, A. parviflora, A. patens, A. piperi
Subordinate taxa	A. oregana var. felix, A. oregana var. oregana
Web links	Local floras: OR, WA Local Web sites: 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	Local floras: 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

Anemone deltoidea

Oregon anemone, Oregon windflower

threeleaf anemone, Columbian windflower

Habit

Perennial from scaly, stout, horizontal rhizomes, the flowering stems 1-3 dm. tall.

Herbaceous perennial from slender, horizontal rhizomes, the flowering stems 1-3 dm. tall, glabrous to stiff-hairy.

Leaves

Basal leaves single, trifoliate, the leaflets once or twice shallowly lobed and remotely serrate; the flowering stem naked except for a whorl of 3 leaves near the top, these trifoliate, petiolate, the leaflets up to 8 cm. long, the lateral pair deeply lobed, all remotely toothed.

Basal leaves usually solitary, the blade tri-foliate, the leaflets short-petiolate, ovate, with coarse, rounded teeth, usually glabrous; the 3 involucral leaves simple, up to 8 cm. long, very similar to the leaflets of the basal leaves.

Flowers

Flowers single;

sepals usually 5, ovate-oblong, 12-20 mm. long, usually blue to blue-violet, but occasionally white or pinkish;

petals none;

stamens 35-100;

pistils numerous.

Flowers solitary;

sepals usually 5, white, ovate to oblanceolate, 1.5-2.5 cm. long, glabrous;

petals none;

stamens and pistils numerous;

style shorter than the achene.

Fruits