Delphinium bicolor |
Delphinium brachycentrum |
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Flathead larkspur, little larkspur, low larkspur, Montana larkspur |
arctic larkspur, northern larkspur |
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Stems | 10-40(-70) cm; base often reddish, glabrous to puberulent. |
20-50(-80) cm; base often reddish, pubescent. |
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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). |
blade round to pentagonal, 1.5-6 × 3-11 cm, puberulent; ultimate lobes 5-15, width 1-7(-15) mm. |
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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. |
5-18-flowered; pedicel 1-4.5 cm, pubescent; bracteoles 2-7 mm from flowers, blue, linear, 5-8 mm, puberulent. |
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Flowers | 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. |
sepals dark blue, apex rounded, puberulent, lateral sepals forward pointing, 17-24 × 7-9 mm, spurs straight to slightly decurved, ascending 30-60° above horizontal, 15-17 mm; lower petal blades ± covering stamens, 5-7 mm, clefts 0.5-1.5 mm; hairs sparse, local, centered, mostly above base of cleft, white. |
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Fruits | (12-)16-22 mm, 4-4.5 times longer than wide, usually puberulent. |
14-17 mm, 3.5-4 times longer than wide, pubescent. |
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Seeds | often winged; seed coat cells with surfaces ± smooth. |
wing-margined; seed coat cells ± elongate, surfaces roughened. |
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Delphinium bicolor |
Delphinium brachycentrum |
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Phenology | Flowering summer. | |||||
Habitat | Well-drained tundra slopes | |||||
Elevation | 0-1600 m (0-5200 ft) | |||||
Distribution |
ID; MT; ND; NE; SD; WY; AB; BC; SK
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AK; YT; e Asia |
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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.) |
Hybrids with Delphinium glaucum are known as D. ×nutans A. Nelson. (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. Bicoloria | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Exaltata | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | D. chamissonis | |||||
Name authority | Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 10. (1834) | Ledebour: Fl. Ross. 1: 60. (1841) | ||||
Web links |