Delphinium nuttallianum |
Delphinium xantholeucum |
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thin-petal larkspur, upland larkspur |
yellow-white larkspur |
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Habit | Pubescent perennial from fleshy roots, the stems 1.5-4 dm. tall, usually single and simple. | 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, long-petiolate, mostly basal, the blades 2-6 cm. broad, 2-4 times parted or lobed into linear or oblong-lanceolate segments 1.5-5 mm. broad; cauline leaves much reduced upward. |
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 simple or compound, the racemes 3-15 flowered; the lower pedicels several times as long as the flowers, spreading or ascending; sepals 5, deep purplish-blue, widely spreading, 17-25 mm. long, the lower pair the largest; the spur 13-20 mm. long, from about as long to twice as long as the top sepal; petals 4, small, the lower pair sometimes brownish or yellow-purplish, or all deep purplish-blue, the blade 3-4 mm. long, deeply bi-lobed; stamens numerous; pistils 3. |
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, somewhat spreading. |
Follicles 15-22 mm. long, erect, glabrous to glandular-pubescent. |
Comments | Specimen records from west of the Cascade Mountains need to be re-examined. |
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Delphinium nuttallianum |
Delphinium xantholeucum |
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Flowering time | March-August | April-June |
Habitat | Dry, gravelly ground, sagebrush deserts to the ponderosa pine region in the mountains. | Dry, grassy hillsides and ponderosa pine forests. |
Distribution | Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
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Occurring east of the Cascades crest in Washington, where endemic to Okanogan, Chelan, and Douglas counties.
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Origin | Native | Native |
Conservation status | Not of concern | Not of concern |
Sibling taxa | ||
Web links |
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