UW Burke Herbarium species comparison

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Delphinium leucophaeum

Delphinium ajacis
Delphinium leucophaeum

pale larkspur

doubtful knight's-spur
Habit Annual herbs with slender taproots, the stems 3-8 dm. tall, glabrous to sparsely puberulent.
Leaves

Leaves alternate, all cauline, the lower petiolate, becoming nearly sessile upward;

leaves many, the blades orbiculate, 1-5 cm. wide, 12- to 60-lobed, the lobes under 1.5 mm. wide.
Flowers

Inflorescence a terminal, 6-30 flowered raceme, simple or with 2-3 branches; pedicles spreading, 1-3 cm. long;

sepals 3, usually blue or purple, 8-18 mm. long, with a spur 12-20 mm. long, and with short, linear bracteoles at least 4 mm. below the sepals;

petals 2, united, 2-lobed, paler and smaller than the sepals;

stamens many, the filaments with the base enlarged;

style 1.
Fruits

Follicles 12-25 mm. long, puberulent.

Delphinium leucophaeum

Delphinium ajacis
Flowering time May-June June-July
Habitat Bluffs, open ground, and moist lowland meadows where undisturbed. Drainage ditches, roadsides, old home sites, waste areas.
Distribution
Occurring west of the Cascades crest in Washington, where known only from Lewis County in Washington; Lewis County, Washington to Willamette Valley, Oregon.
[WildflowerSearch map]
Limited in distribution to a few localities west of the Cascades in Washington; widely distributed throughout much of North America.
[WildflowerSearch map]
Origin Native Introduced
Conservation status Endangered in Washington (WANHP) Not of concern
Sibling taxa
D. ajacis, D. basalticum, D. ×burkei, D. depauperatum, D. distichum, D. glareosum, D. glaucum, D. lineapetalum, D. menziesii, D. multiplex, D. nuttallianum, D. nuttallii, D. occidentale, D. stachydeum, D. sutherlandii, D. trolliifolium, D. viridescens, D. xantholeucum
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
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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