Delphinium distichum |
Delphinium nuttallianum |
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two-spike larkspur |
thin-petal larkspur, upland larkspur |
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Habit | Sturdy, grey-puberulent perennial from fleshy roots, the stems 4-7 dm. tall. | Pubescent perennial from fleshy roots, the stems 1.5-4 dm. tall, usually single and simple. |
Leaves | Basal and lower cauline leaves long-petiolate, the blades 4-6 cm. broad and divided nearly to the base into 3 segments, which are twice divided into broad segments; lower leaves abruptly transitional into mid-stem leaves, which are short-petiolate, very numerous and overlapping, and finely divided into linear segments. |
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. |
Flowers | Inflorescence a many-flowered, spike-like raceme, the pedicels shorter than the calyx spur and strongly ascending; sepals 5, bluish-purple with lighter streaks, cupped forward, 7-9 mm long, oblong, the spur 11-17 mm. long; petals 4, small, the lower pair blue, lobed, the upper pair white; stamens numerous; pistils 3. |
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. |
Fruits | Follicles 8-12 mm. long, erect, usually glandular. |
Follicles 15-22 mm. long, somewhat spreading. |
Comments | Specimen records from west of the Cascade Mountains need to be re-examined. |
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Delphinium distichum |
Delphinium nuttallianum |
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Flowering time | May-July | March-August |
Habitat | Vernally wet swales and meadows, in sagebrush or ponderosa pine forest. | Dry, gravelly ground, sagebrush deserts to the ponderosa pine region in the mountains. |
Distribution | Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to Montana and Wyoming.
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Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
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Origin | Native | Native |
Conservation status | Not of concern | Not of concern |
Sibling taxa | ||
Web links |
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