Delphinium umbraculorum |
Delphinium bicolor |
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umbrella larkspur |
Flathead larkspur, little larkspur, low larkspur, Montana larkspur |
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Stems | 40-70(-90) cm; base often reddish, glabrous or puberulent. |
10-40(-70) cm; base often reddish, glabrous to puberulent. |
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Leaves | blade round to pentagonal, 1.5-4 × 2-6 cm, nearly glabrous; ultimate lobes 3-13, width 3-20 mm (basal), 1-8 mm (cauline). |
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 | (5-)10-25(-45)-flowered, open, narrowly pyramidal; pedicel 0.5-3(-7) cm, glabrous to puberulent; bracteoles 3-7 mm from flowers, green, linear, 3-6 mm, puberulent. |
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 dark blue, puberulent, lateral sepals spreading, 9-16 × 4-7 mm, spurs gently upcurved, ascending 30-45° above horizontal, 8-14 mm; lower petal blades elevated, exposing stamens, 3.5-6 mm, clefts 0.5-1.5 mm; hairs densest near junction of blade and claw above base of cleft, centered or on inner lobes, white. |
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 | 9-16(-19) mm, 2.5-3(-4) times longer than wide, puberulent. |
(12-)16-22 mm, 4-4.5 times longer than wide, usually puberulent. |
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Seeds | seed coat cells brick-shaped, cell margins straight, surfaces smooth. |
often winged; seed coat cells with surfaces ± smooth. |
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2n | = 16. |
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Delphinium umbraculorum |
Delphinium bicolor |
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Phenology | Flowering late spring–early summer. | |||||
Habitat | Slopes in oak forests | |||||
Elevation | 400-1600 m (1300-5200 ft) | |||||
Distribution |
CA
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ID; MT; ND; NE; SD; WY; AB; BC; SK
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Discussion | Delphinium umbraculorum is most often confused with D. patens subsp. hepaticoideum; refer to discussion of that taxon for distinguishing features. Hybrids occur with D. parryi and D. patens subsp. montanum. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. Subscaposa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Bicoloria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | H. F. Lewis & Epling: Brittonia 8: 19. (1954) | Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 10. (1834) | ||||
Web links |