Burke: Delphinium trolliifolium vs. Delphinium glareosum

	Delphinium trolliifolium	Delphinium glareosum
	cow-poison, poison larkspur	Olympic larkspur
Habit	Stout perennial from short, thick rhizomes, the several erect stems 7-15 dm. tall, simple below the inflorescence, hollow, glabrous to sparsely hairy.	Sturdy perennial from a thick, fibrous, woody root, the 1-several stems stout, simple, 2-3 dm. tall.
Leaves	Leaves numerous, evenly spaced and gradually reduced upward, the blades of the lower ones 10-20 cm. broad, tri-lobed nearly to the base, the 2 lateral lobes deeply divided into 2-3 segments, the segments broadly wedge-shaped and 2-3 times deeply toothed.	Leaves numerous, fleshy, evenly distributed below the inflorescence, but the petioles of the lower and basal leaves proportionately longer, forming a rounded clump; leaf blades 3-8 cm. broad, divided nearly to the base into 3 primary lobes, the lateral lobes again divided into 2-3 parts, the ultimate segments linear to narrowly oblong, entire.
Flowers	Inflorescence elongate and loose, the raceme usually simple, pubescent with spreading, yellowish hairs, leafy-bracteate below; pedicels considerably exceeding the sepal spur, spreading; sepals 5, deep blue, oblong-lanceolate and pointed, 18-25 mm. long, the spur straight, about equal to the blade of the upper sepal; petals 4, small, the lower pair colored as the sepals, the upper pair white; stamens numerous; pistils 3.	Inflorescence loose and broad, the racemes compound, often half the height of the plant, the lower flowers or racemes in leaf axils; pedicels long, stout, spreading; sepals 5, deep purplish-blue, the lower pair 12-16 mm. long, the lateral pair oblanceolate, pointed, the spur 12-17 mm. long, exceeding the blade of the upper sepal; petals 4, small, blue; stamens numerous; pistils 3.
Fruits	Follicles glabrous, about 15 mm. long.	Follicles spreading, 11-14 mm. long..

	Delphinium trolliifolium	Delphinium glareosum
Flowering time	April-May	May-August
Habitat	Moist, shady woods at low to middle elevations.	Alpine and subalpine ridges and talus slopes, sometimes found at lower elevations.
Distribution	Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; Washington south to California. [WildflowerSearch map] [BONAP county map]	Occurring in the Olympics and Cascades Range in Washington; British Columbia to Oregon. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	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. viridescens, D. xantholeucum	D. ajacis, D. basalticum, D. ×burkei, D. depauperatum, D. distichum, 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
Web links	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	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

Delphinium glareosum

cow-poison, poison larkspur

Olympic larkspur

Habit

Stout perennial from short, thick rhizomes, the several erect stems 7-15 dm. tall, simple below the inflorescence, hollow, glabrous to sparsely hairy.

Sturdy perennial from a thick, fibrous, woody root, the 1-several stems stout, simple, 2-3 dm. tall.

Leaves

Leaves numerous, evenly spaced and gradually reduced upward, the blades of the lower ones 10-20 cm. broad, tri-lobed nearly to the base, the 2 lateral lobes deeply divided into 2-3 segments, the segments broadly wedge-shaped and 2-3 times deeply toothed.

Leaves numerous, fleshy, evenly distributed below the inflorescence, but the petioles of the lower and basal leaves proportionately longer, forming a rounded clump;

leaf blades 3-8 cm. broad, divided nearly to the base into 3 primary lobes, the lateral lobes again divided into 2-3 parts, the ultimate segments linear to narrowly oblong, entire.

Flowers

Inflorescence elongate and loose, the raceme usually simple, pubescent with spreading, yellowish hairs, leafy-bracteate below;

pedicels considerably exceeding the sepal spur, spreading;

sepals 5, deep blue, oblong-lanceolate and pointed, 18-25 mm. long, the spur straight, about equal to the blade of the upper sepal;

petals 4, small, the lower pair colored as the sepals, the upper pair white;

stamens numerous;

pistils 3.

Inflorescence loose and broad, the racemes compound, often half the height of the plant, the lower flowers or racemes in leaf axils;

pedicels long, stout, spreading;

sepals 5, deep purplish-blue, the lower pair 12-16 mm. long, the lateral pair oblanceolate, pointed, the spur 12-17 mm. long, exceeding the blade of the upper sepal;

petals 4, small, blue;

stamens numerous;

pistils 3.

Fruits

Follicles glabrous, about 15 mm. long.

Follicles spreading, 11-14 mm. long..