Delphinium bicolor |
Delphinium wootonii |
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Flathead larkspur, little larkspur, low larkspur, Montana larkspur |
Organ Mountain larkspur, Wooton's larkspur |
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Stems | 10-40(-70) cm; base often reddish, glabrous to puberulent. |
(15-)30-50(-60) cm; base sometimes 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 reniform to fan-shaped, 1.5-3 × 2.5-4 cm, puberulent; ultimate lobes 5-24, width 2-6 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. |
15-30(-49)-flowered; pedicel 1-2(-3.6) cm, puberulent; bracteoles 1-5 mm from flowers, green, linear, 1-4(-12) 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 white to lavender, nearly glabrous, lateral sepals usually reflexed, (6-)8-13 × 3-7 mm, spur straight, ascending 30-80° above horizontal, (8-)13-20(-25) mm; lower petal blades ± elevated, 6-9 mm, cleft 2.5-4.5 mm; hairs centered, densest near base of cleft, white. |
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Fruits | (12-)16-22 mm, 4-4.5 times longer than wide, usually puberulent. |
(10-)11-20(-24) mm, 3-3.5 times longer than wide, glabrous. |
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Seeds | often winged; seed coat cells with surfaces ± smooth. |
seed coat cells with surfaces pustulate. |
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2n | = 16. |
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Delphinium bicolor |
Delphinium wootonii |
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Phenology | Flowering spring. | |||||
Habitat | Oak woods, grasslands, desert scrub | |||||
Elevation | 700-1800 m (2300-5900 ft) | |||||
Distribution |
ID; MT; ND; NE; SD; WY; AB; BC; SK
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AZ; CO; NM; TX; Mexico (Sonora, Chihuahua, and Coahuila)
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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 wootonii hybridizes with D. madrense in the eastern Big Bend area of Texas, and with D. carolinianum subsp. virescens. (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. Virescens | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | D. virescens subsp. wootonii | |||||
Name authority | Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 10. (1834) | Rydberg: Bull. Torrey Bot. Club 26: 587. (1900) | ||||
Web links |