Delphinium carolinianum |
Delphinium treleasei |
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Carolina larkspur |
glade larkspur, Trelease's larkspur |
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Stems | (20-)40-90(-150) cm; base reddish or not, ± pubescent. |
(40-)60-80(-110) cm; base reddish, glabrous, glaucous. |
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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 round to reniform, 0.5-8 × 2-20 cm, glabrous; ultimate lobes 3-35(-56), 5 or more extending more than 3/5 distance to petiole, width 2-6 mm (basal), 0.5-2 mm (cauline), widest at middle or in proximal 1/2. |
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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. |
5-30(-56)-flowered; pedicel (1-)2.5-7(-11) cm, glabrous; bracteoles 1-7(-46) mm from flowers, blue or green, awl-shaped, 1.5-4(-12) mm, glabrous. |
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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 bright blue, usually retaining color upon drying, nearly glabrous, lateral sepals spreading, (10-)12-17(-20) × 4-8(-10) mm, spurs straight, ascending ca. 45°, 15-17 mm; lower petal blades ± covering stamens, 5-8 mm, clefts (1-)3-5 mm; hairs centered, densest above base of cleft, yellow. |
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Fruits | (10-)12.5-18.5(-27) mm, 4-4.5 times longer than wide, glabrous to puberulent. |
12-18(-22) mm, 3-4 times longer than wide, glabrous. |
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Seeds | seed coat cells with surfaces pustulate or smooth. |
unwinged; seed coat cell surfaces smooth. |
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2n | = 16. |
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Delphinium carolinianum |
Delphinium treleasei |
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Phenology | Flowering late spring. | |||||||||||||
Habitat | Open juniper glades on calcareous substrate | |||||||||||||
Elevation | 250-450 m (800-1500 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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AR; MO |
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Discussion | Subspecies 4 (4 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Delphinium treleasei is locally abundant but extremely limited by microhabitat within its distributional range. Hybrids between Delphinium treleasei and D. carolinianum subsp. carolinianum are known. (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. Grumosa | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Name authority | Walter: Fl. Carol., 155. (1788) | Bush ex K. C. Davis: Minnesota Bot. Stud. 2: 444. (1900) | ||||||||||||
Web links |