Delphinium nuttallii subsp. nuttallii(synonym of Delphinium oreganum) |
Delphinium bicolor |
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Willamette Valley larkspur |
Flathead larkspur, little larkspur, low larkspur, Montana larkspur |
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Stems | 40-70 cm. |
10-40(-70) cm; base often reddish, glabrous to puberulent. |
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Leaves | blade round, 1-4 × 1.5-7 cm, glabrous to puberulent; ultimate lobes 3-19, width 1-8 mm (basal), 1-3 mm (cauline). |
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Inflorescences | 3-12(-22)-flowered; pedicel 1-4(-8) cm, ± puberulent; bracteoles 2-7(-17) mm from flowers, green, sometimes white-margined, lanceolate, 4-6(-8) mm, puberulent. |
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Flowers | sepals blue or bluish purple, spurs 10-13 mm; lower petal blades 4.5-6.5 mm. |
sepals dark blue, puberulent, lateral sepals usually spreading, 16-21 × 6-12 mm, spurs straight to gently decurved, ascending 0-40° above horizontal, 13-23 mm; lower petal blades covering stamens, 7-12 mm, clefts 0.1-3 mm; hairs sparse, short, mostly on inner lobes below junction of blade and claw, white or yellow. |
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Fruits | (12-)16-22 mm, 4-4.5 times longer than wide, usually puberulent. |
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Seeds | often winged; seed coat cells with surfaces ± smooth. |
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2n | = 16. |
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Delphinium nuttallii subsp. nuttallii |
Delphinium bicolor |
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Phenology | Flowering late spring–early summer. | |||||
Habitat | Rock outcrops, rocky meadows | |||||
Elevation | 20-300 m (100-1000 ft) | |||||
Distribution |
OR; WA |
ID; MT; ND; NE; SD; WY; AB; BC; SK
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Discussion | Subspecies 2 (2 in the flora). Delphinium bicolor is closely related to D. glareosum; it differs in its wider-lobed cauline leaves, shallower petal clefts, and narrower fruits. The Gosiute consider this plant to be poisonous (D. E. Moerman 1986, subspecies not specified). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 3. | FNA vol. 3. | ||||
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Grumosa > Delphinium nuttallii | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Bicoloria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | unknown | Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 10. (1834) | ||||
Web links |