Burke: Delphinium oreganum vs. Delphinium glaucum

	Delphinium oreganum	Delphinium glaucum
		pale larkspur
Habit		Stout, glabrous and glaucous perennial from thick rhizomes, the several simple, hollow stems 10-20 dm. tall.
Leaves		Leaves numerous, gradually reduced upward, all divided over half their length into five broad, wedge-shaped segments, these sharply 2-3 times toothed; the blades of the lower leaves may be 15-20 cm. broad.
Flowers		Inflorescence a simple or compound raceme, rather elongate and loosely many-flowered; sepals 5, deep blue-purple, oblong-elliptic, 6-12 mm. long, the spur straight, shorter than the blade of the upper sepal; petals 4, small, pale blue; stamens numerous; pistils 3.
Fruits		Follicles erect, 10-14 mm. long, glabrous.

	Delphinium oreganum	Delphinium glaucum
Flowering time		July-September
Habitat		Meadows and wet thickets, bogs, streambanks, and coniferous forest openings at middle elevations in the mountains.
Distribution		Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains and the Canadian Great Plains. [WildflowerSearch map] [BONAP county map]
Origin		Native
Conservation status		Not of concern
Sibling taxa	D. ajacis, D. basalticum, D. ×burkei, D. depauperatum, D. distichum, D. glareosum, D. glaucum, D. leucophaeum, D. lineapetalum, D. menziesii, D. multiplex, D. nuttallianum, D. nuttallii, D. occidentale, D. stachydeum, D. sutherlandii, D. trolliifolium, D. viridescens, D. xantholeucum	D. ajacis, D. basalticum, D. ×burkei, D. depauperatum, D. distichum, D. glareosum, D. leucophaeum, D. lineapetalum, D. menziesii, D. multiplex, D. nuttallianum, D. nuttallii, D. occidentale, D. stachydeum, D. sutherlandii, D. trolliifolium, D. viridescens, D. xantholeucum
Web links	Local floras: OR 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

Delphinium oreganum

Delphinium glaucum

pale larkspur

Habit

Stout, glabrous and glaucous perennial from thick rhizomes, the several simple, hollow stems 10-20 dm. tall.

Leaves

Leaves numerous, gradually reduced upward, all divided over half their length into five broad, wedge-shaped segments, these sharply 2-3 times toothed; the blades of the lower leaves may be 15-20 cm. broad.

Flowers

Inflorescence a simple or compound raceme, rather elongate and loosely many-flowered;

sepals 5, deep blue-purple, oblong-elliptic, 6-12 mm. long, the spur straight, shorter than the blade of the upper sepal;

petals 4, small, pale blue;

stamens numerous;

pistils 3.

Fruits

Follicles erect, 10-14 mm. long, glabrous.