UW Burke Herbarium species comparison

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Delphinium xantholeucum

Delphinium menziesii

yellow-white larkspur

Menzies 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. Glabrous to pubescent perennial from several small tubers, the single, simple or branched stem 1-5 dm. tall.
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.

Leaves mostly cauline, only the basal ones long-petiolate, the blades 3-7 cm. broad, 2-3 times dissected, the ultimate segments comparatively few, narrowly oblong.
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 simple to compound, the racemes 3-20 flowered, open and loose, the pedicels from sub-equal to the flowers to several times as long;

sepals 5, deep blue, 12-18 mm. long, the spur 13-15 mm. long, much longer than the upper sepal;

petals 4, small, the lower pair blue, lightly veined and shallowly notched, the upper pair white or light blue;

stamens numerous;

pistils 3.
Fruits

Follicles 15-22 mm. long, erect, glabrous to glandular-pubescent.

Follicles 9-16 mm. long, erect to spreading, densely pubescent.

Delphinium xantholeucum

Delphinium menziesii
Flowering time April-June April-July
Habitat Dry, grassy hillsides and ponderosa pine forests. Coastal bluffs and prairies to moist meadows and forest openings at moderate elevations in the mountains.
Distribution
Occurring east of the Cascades crest in Washington, where endemic to Okanogan, Chelan, and Douglas counties.
[WildflowerSearch map]
[BONAP county map]
Occurring on both sides of the Cascades crest 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. trolliifolium, D. viridescens
D. ajacis, D. basalticum, D. ×burkei, D. depauperatum, D. distichum, D. glareosum, D. glaucum, D. leucophaeum, D. lineapetalum, D. multiplex, D. nuttallianum, D. nuttallii, D. occidentale, D. stachydeum, D. sutherlandii, D. trolliifolium, D. viridescens, D. xantholeucum
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Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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