Burke: Delphinium xantholeucum vs. Delphinium depauperatum

	Delphinium xantholeucum	Delphinium depauperatum
	yellow-white larkspur	slim 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.
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.
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.
Fruits	Follicles 15-22 mm. long, erect, glabrous to glandular-pubescent.

	Delphinium xantholeucum	Delphinium depauperatum
Flowering time	April-June	May-July
Habitat	Dry, grassy hillsides and ponderosa pine forests.	From vernally moist sagebrush valleys to subalpine meadows.
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; Washington to California, east to Montana, Idaho, and Nevada. [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. trolliifolium, D. viridescens	D. ajacis, D. basalticum, D. ×burkei, 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
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: 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 xantholeucum

Delphinium depauperatum

yellow-white larkspur

slim 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.

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.

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.

Fruits