Delphinium exaltatum |
Delphinium bicolor |
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tall larkspur |
Flathead larkspur, little larkspur, low larkspur, Montana larkspur |
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Stems | 70-200 cm; base reddish, nearly glabrous. |
10-40(-70) cm; base often reddish, glabrous to puberulent. |
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Leaves | blade pentagonal, 2-7 × 3-9 cm, puberulent; ultimate lobes 3-7, width 5-25 mm; midcauline leaf lobes less than 3 times longer than wide. |
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 | 8-30-flowered; pedicel 0.5-2 cm, puberulent; bracteoles 2-4 mm from flowers, green, linear, 2-4 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 whitish to pale lavender or purple, puberulent, lateral sepals forward pointing, 9-11 × 4-6 mm, spurs straight, as much as 45° above or below horizontal, 9-12 mm; lower petal blades ± covering stamens, 3-5 mm, clefts 1-2 mm; hairs centered, mostly near base of cleft, 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 | 7-12 mm, 2-2.5 times longer than wide, ± puberulent. |
(12-)16-22 mm, 4-4.5 times longer than wide, usually puberulent. |
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Seeds | ± wing-margined; seed coat cells elongate, surfaces smooth. |
often winged; seed coat cells with surfaces ± smooth. |
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Delphinium exaltatum |
Delphinium bicolor |
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Phenology | Flowering summer. | |||||
Habitat | Rocky slopes in open deciduous woods and barrens, mainly on calcareous substrates, also shale and mafic and ultramafic rocks | |||||
Elevation | 150-2000 m (500-6600 ft) | |||||
Distribution |
AL; KY; MD; MO; NC; OH; PA; TN; VA; WV
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ID; MT; ND; NE; SD; WY; AB; BC; SK
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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.) |
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Key |
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Source | FNA vol. 3. | FNA vol. 3. | ||||
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Exaltata | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Bicoloria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Aiton: Hort. Kew. 2: 244. (1789) | Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 10. (1834) | ||||
Web links |