Delphinium bicolor |
Delphinium distichum |
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Flathead larkspur, little larkspur, low larkspur, Montana larkspur |
Burke's larkspur, meadow larkspur, strict larkspur, two-spike larkspur |
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Stems | 10-40(-70) cm; base often reddish, glabrous to puberulent. |
(25-)30-60(-80) 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 cuneate to semicircular, 1-5 × 1.5-7 cm, puberulent; ultimate lobes 5-19, width 2-8(-15) mm (basal), 0.5-3(-5) mm (cauline); margins of basal leaf, measured less than 1 cm from blade base, demarcating considerably more than 90° of arc when leaf laid flat; most cauline leaf blades exceeding internodes. |
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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. |
8-30(-40)-flowered, usually dense; pedicel 0.5-1.5 cm, puberulent; bracteoles 0-3 mm from flowers, green to blue, linear, 4-8 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 to bluish purple, puberulent, lateral sepals ± erect, 8-12 × 3.5-5 mm, spurs straight, horizontal or nearly so, 9-15 mm; lower petal blades ± covering stamens, 4.5-6.5 mm, clefts 2-3 mm; hairs centered mostly near base of cleft, white. |
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Fruits | (12-)16-22 mm, 4-4.5 times longer than wide, usually puberulent. |
7-13 mm, 3.5-4 times longer than wide, ± puberulent. |
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Seeds | often winged; seed coat cells with surfaces ± smooth. |
seed coat cells with surfaces roughened. |
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2n | = 16. |
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Delphinium bicolor |
Delphinium distichum |
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Phenology | Flowering late spring–early summer. | |||||
Habitat | Wet meadows | |||||
Elevation | 100-2400 m (300-7900 ft) | |||||
Distribution |
ID; MT; ND; NE; SD; WY; AB; BC; SK
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ID; MT; OR; WA; WY; BC
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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 distichum hybridizes with D. multiplex and D. nuttallianum (D. ×diversicolor Rydberg). The name D. burkei has often been misapplied to D. distichum. (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. Depauperata | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | D. strictum var. distichiflorum | |||||
Name authority | Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 10. (1834) | Geyer ex Hooker: J. Bot. 6: 68. (1847) | ||||
Web links |
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