Burke: Delphinium xantholeucum vs. Delphinium viridescens

	Delphinium xantholeucum	Delphinium viridescens
	yellow-white larkspur	Wenatchee larkspur
Habit	Rather stout perennial from a thick, branching, fibrous root, the single stem 3-8 dm. tall, glabrous below but glandular at least in the inflorescence.	Stout perennial from a short rhizome, the several hollow stems 8-12 dm. tall, glabrous below but with copious stalked, yellow glands above and throughout the inflorescence.
Leaves	Leaves few, glabrous and glaucous, mostly on the lower 1/5 of the stem; leaf blades 2-7 cm. broad, 3-4 times dissected, the ultimate segments linear, 1-2 mm. broad.	Basal and lower cauline leaves long-petiolate, the blades up to 10 cm. broad, divided into 3 main wedge-shaped lobes, these once or twice cleft into oblong-rounded segments; mid-cauline leaves short-petiolate and overlapping, nearly erect, divided into narrow, acute segments, abruptly transitional to the lower leaves, but gradually transitional to the linear, entire, bract-like upper leaves.
Flowers	Inflorescence compound, the main raceme as long as the rest of the stem, loosely many-flowered; pedicels elongate, spreading; sepals 5, creamy-white to greenish-white, green-tipped, the lateral pair oblong, about 10 mm. long; spur 12-15 mm. long; petals 4, small, creamy-yellow; stamens numerous; pistils 3.	Inflorescence usually a simple, narrow raceme, the pedicels shorter than the flowers; sepals 5, purplish, but strongly streaked with yellow or greenish-yellow, oblanceolate, glandular, 7-11 mm. long; spur thick, straight, 7-10 mm. long; petals 4, yellowish or purple, the lower pair densely soft-hairy, equaling the sepals; stamens numerous; pistils 3.
Fruits	Follicles 15-22 mm. long, erect, glabrous to glandular-pubescent.	Follicles 6-8 mm. long, erect, densely glandular-pubescent.

	Delphinium xantholeucum	Delphinium viridescens
Flowering time	April-June	June-July
Habitat	Dry, grassy hillsides and ponderosa pine forests.	Boggy meadowlands.
Distribution	Occurring east of the Cascades crest in Washington, where endemic to Okanogan, Chelan, and Douglas counties. [WildflowerSearch map] [BONAP county map]	Occurring east of the Cascades crest in Washington, where endemic to the Wenatchee Mountains of Chelan and Kittitas counties. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Threatened in Washington (WANHP)
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. 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. xantholeucum
Web links	Local floras: WA 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: WA 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

Delphinium viridescens

yellow-white larkspur

Wenatchee larkspur

Habit

Rather stout perennial from a thick, branching, fibrous root, the single stem 3-8 dm. tall, glabrous below but glandular at least in the inflorescence.

Stout perennial from a short rhizome, the several hollow stems 8-12 dm. tall, glabrous below but with copious stalked, yellow glands above and throughout the inflorescence.

Leaves

Leaves few, glabrous and glaucous, mostly on the lower 1/5 of the stem;

leaf blades 2-7 cm. broad, 3-4 times dissected, the ultimate segments linear, 1-2 mm. broad.

Basal and lower cauline leaves long-petiolate, the blades up to 10 cm. broad, divided into 3 main wedge-shaped lobes, these once or twice cleft into oblong-rounded segments; mid-cauline leaves short-petiolate and overlapping, nearly erect, divided into narrow, acute segments, abruptly transitional to the lower leaves, but gradually transitional to the linear, entire, bract-like upper leaves.

Flowers

Inflorescence compound, the main raceme as long as the rest of the stem, loosely many-flowered;

pedicels elongate, spreading;

sepals 5, creamy-white to greenish-white, green-tipped, the lateral pair oblong, about 10 mm. long;

spur 12-15 mm. long;

petals 4, small, creamy-yellow;

stamens numerous;

pistils 3.

Inflorescence usually a simple, narrow raceme, the pedicels shorter than the flowers;

sepals 5, purplish, but strongly streaked with yellow or greenish-yellow, oblanceolate, glandular, 7-11 mm. long;

spur thick, straight, 7-10 mm. long;

petals 4, yellowish or purple, the lower pair densely soft-hairy, equaling the sepals;