Delphinium bicolor |
Delphinium sutherlandii |
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Flathead larkspur, little larkspur, low larkspur, Montana larkspur |
Sutherland's larkspur |
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Stems | 10-40(-70) cm; base often reddish, glabrous to puberulent. |
(15-)30-70 cm; base often reddish, glabrous. |
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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, 1.5-10 × 3-18 cm, nearly glabrous; ultimate lobes 5-21, 5 or more extending more than 3/5 distance to petiole, width 3-9(-15) mm (basal), 0.5-6(-10) mm (cauline), widest at middle or in proximal 1/2. |
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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. |
(2-)11-26(-37)-flowered, at least 2 times longer than wide; pedicel 1-3 cm, puberulent; bracteoles 2-7 mm from flowers, green to blue, linear-lanceolate, 3-5 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, retaining color upon drying, puberulent, lateral sepals spreading, 14-20 × 5-10 mm, spurs gently decurved, ascending 0-20° above horizontal, 14-18 mm; lower petal blades slightly elevated, ± covering stamens, white, yellowish, or tan, 8-12 mm, clefts 2-4 mm; hairs short, sparse, mostly below junction of blade and claw, slightly offset to inner lobes, white. |
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Fruits | (12-)16-22 mm, 4-4.5 times longer than wide, usually puberulent. |
(13-)18-25 mm, 4.5-5.2 times longer than wide, puberulent. |
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Seeds | often winged; seed coat cells with surfaces ± smooth. |
winged on 1 margin; seed coat cell surfaces roughened. |
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2n | = 16. |
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Delphinium bicolor |
Delphinium sutherlandii |
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Phenology | Flowering spring. | |||||
Habitat | Dry meadows, rock outcrops, open conifer woods | |||||
Elevation | 400-800 m (1300-2600 ft) | |||||
Distribution |
ID; MT; ND; NE; SD; WY; AB; BC; SK
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ID; MT; WA; 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.) |
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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. Grumosa | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Nuttall: J. Acad. Nat. Sci. Philadelphia 7: 10. (1834) | M. J. Warnock: Phytologia 78: 97. (1995) | ||||
Web links |