Delphinium carolinianum |
Delphinium distichum |
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Carolina larkspur |
Burke's larkspur, meadow larkspur, strict larkspur, two-spike larkspur |
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Stems | (20-)40-90(-150) cm; base reddish or not, ± pubescent. |
(25-)30-60(-80) cm; base sometimes reddish, puberulent. |
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Leaves | blade round to pentagonal, 1-8 × 2-12 cm, pubescence variable; ultimate lobes 3-29, width 2-10 mm (basal), 1-7 mm (cauline). |
blade cuneate to semicircular, 1-5 × 1.5-7 cm, puberulent; ultimate lobes 5-19, width 2-8(-15) mm (basal), 0.5-3(-5) mm (cauline); margins of basal leaf, measured less than 1 cm from blade base, demarcating considerably more than 90° of arc when leaf laid flat; most cauline leaf blades exceeding internodes. |
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Inflorescences | (3-)8-27(-94)-flowered; pedicel (0.4-)0.7-1.8(-5.7) cm, nearly glabrous to glandular; bracteoles 1-3.5(-6) mm from flowers, green or blue, linear, 2-7 mm, pubescence nearly glabrous to glandular. |
8-30(-40)-flowered, usually dense; pedicel 0.5-1.5 cm, puberulent; bracteoles 0-3 mm from flowers, green to blue, linear, 4-8 mm, puberulent. |
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Flowers | sepals purple to blue to white, nearly glabrous, lateral sepals spreading, (7-)9-14(-17) × (3-)3.5-6(-8) mm, spurs ± upcurved, ascending 20-90° above vertical, (9-)11-17(-19) mm; lower petal blades ± covering stamens, 5-7 mm, cleft 2-4 mm; hairs centered, densest near base of cleft, white, sometimes blue or yellow. |
sepals dark blue to bluish purple, puberulent, lateral sepals ± erect, 8-12 × 3.5-5 mm, spurs straight, horizontal or nearly so, 9-15 mm; lower petal blades ± covering stamens, 4.5-6.5 mm, clefts 2-3 mm; hairs centered mostly near base of cleft, white. |
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Fruits | (10-)12.5-18.5(-27) mm, 4-4.5 times longer than wide, glabrous to puberulent. |
7-13 mm, 3.5-4 times longer than wide, ± puberulent. |
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Seeds | seed coat cells with surfaces pustulate or smooth. |
seed coat cells with surfaces roughened. |
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2n | = 16. |
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Delphinium carolinianum |
Delphinium distichum |
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Phenology | Flowering late spring–early summer. | |||||||||||||
Habitat | Wet meadows | |||||||||||||
Elevation | 100-2400 m (300-7900 ft) | |||||||||||||
Distribution |
AL; AR; CO; FL; GA; IA; IL; KS; KY; LA; MN; MO; MS; NC; ND; NE; OK; SC; SD; TN; TX; WI; MB; Mexico
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ID; MT; OR; WA; WY; BC
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Discussion | Subspecies 4 (4 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Delphinium distichum hybridizes with D. multiplex and D. nuttallianum (D. ×diversicolor Rydberg). The name D. burkei has often been misapplied to D. distichum. (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. Virescens | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Depauperata | ||||||||||||
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Subordinate taxa | ||||||||||||||
Synonyms | D. strictum var. distichiflorum | |||||||||||||
Name authority | Walter: Fl. Carol., 155. (1788) | Geyer ex Hooker: J. Bot. 6: 68. (1847) | ||||||||||||
Web links |
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