Delphinium bicolor |
Delphinium ramosum |
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Flathead larkspur, little larkspur, low larkspur, Montana larkspur |
mountain larkspur |
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Stems | 10-40(-70) cm; base often reddish, glabrous to puberulent. |
(45-)70-100 cm; base sometimes reddish, 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). |
blade round to pentagonal, 2-8 × 4-14 cm, nearly glabrous; ultimate lobes 5-21, width 1-5 mm; midcauline leaf lobes more than 3 times longer than wide. |
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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. |
(10-)15-40(-120)-flowered; pedicel 1-2.5(-4) cm, puberulent; bracteoles 1-3 mm from flowers, green, sometimes margins white, linear or lanceolate, 3-5(-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 bright dark blue, apex rounded, puberulent, lateral sepals forward pointing to spreading, 11-13 × 4-6 mm, spurs straight, ascending ca. 30° above horizontal, 9-13 mm; lower petal blades ± covering stamens, 5-7 mm, clefts 2-3 mm; hairs centered above base of cleft, white. |
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Fruits | (12-)16-22 mm, 4-4.5 times longer than wide, usually puberulent. |
11-17 mm, 3-4 times longer than wide, puberulent. |
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Seeds | often winged; seed coat cells with surfaces ± smooth. |
wing-margined; seed coat cells narrow, short, surfaces roughened. |
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2n | = 16. |
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Delphinium bicolor |
Delphinium ramosum |
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Phenology | Flowering summer. | |||||
Habitat | Meadows, aspen woodlands, Artemisia scrub | |||||
Elevation | 2100-3200(-3400) m (6900-10500(-11200) ft) | |||||
Distribution |
ID; MT; ND; NE; SD; WY; AB; BC; SK
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CO; NM
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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.) |
Delphinium ramosum hybridizes with D. barbeyi and D. glaucum. (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 | ||||||
Name authority | Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 10. (1834) | Rydberg: Bull. Torrey Bot. Club 28: 276. (1901) | ||||
Web links |