Delphinium bicolor |
Delphinium lineapetalum |
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Flathead larkspur, little larkspur, low larkspur, Montana larkspur |
thinpetal larkspur |
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Stems | 10-40(-70) cm; base often reddish, glabrous to puberulent. |
(15-)30-60 cm; base usually reddish, glabrous to glaucous. |
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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, 1-5 × 2-6 cm, glabrous; ultimate lobes 5-16, width 1-4 mm (basal), 0.5-3 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. |
(3-)9-24(-40)-flowered, pyramidal; pedicel spreading, 1-2.5 cm, glabrous or glandular-puberulent; bracteoles 4-7 mm from flowers, blue or green, linear, 1-3 mm, glabrous or glandular-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 light blue to lavender, nearly glabrous, lateral sepals reflexed, 10-13 × 3-5 mm, spurs straight to slightly decurved, nearly horizontal to ascending ca. 30°, 11-17 mm; lower petal blades elevated, exposing stamens, 3-5 mm, clefts 0.5-2 mm; hairs centered mostly on inner lobes near base of cleft, white. |
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Fruits | (12-)16-22 mm, 4-4.5 times longer than wide, usually puberulent. |
13-21 mm, 4-4.5 times longer than wide, puberulent to glabrous. |
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Seeds | often winged; seed coat cells with surfaces ± smooth. |
seed coat cells narrow, short, cell margins straight, surfaces smooth. |
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Delphinium bicolor |
Delphinium lineapetalum |
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Phenology | Flowering spring. | |||||
Habitat | Open pine woods, dry meadows | |||||
Elevation | 400-1800 m (1300-5900 ft) | |||||
Distribution |
ID; MT; ND; NE; SD; WY; AB; BC; SK
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WA
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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.) |
Of conservation concern. (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. Subscaposa | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | D. nuttallianum var. lineapetalum | |||||
Name authority | Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 10. (1834) | Ewan: Univ. Colorado Stud., Ser. D, Phys. Sci. 2: 126. (1945) | ||||
Web links |