Delphinium brachycentrum |
Delphinium madrense |
|
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arctic larkspur, northern larkspur |
Edwards' Plateau larkspur, Sierra madre larkspur |
|
Stems | 20-50(-80) cm; base often reddish, pubescent. |
30-80(-100) cm; base often reddish, puberulent. |
Leaves | blade round to pentagonal, 1.5-6 × 3-11 cm, puberulent; ultimate lobes 5-15, width 1-7(-15) mm. |
blade semicircular to cordate, 2-8 × 2-10 cm, nearly glabrous; ultimate lobes 3-12, width 3-10 mm (basal), 2-6 mm (cauline). |
Inflorescences | 5-18-flowered; pedicel 1-4.5 cm, pubescent; bracteoles 2-7 mm from flowers, blue, linear, 5-8 mm, puberulent. |
5-75(-98)-flowered; pedicel 1-2.5(-5) cm, puberulent; bracteoles 2-4(-8) mm from flowers, green, lanceolate-linear, 3-5 mm, puberulent. |
Flowers | sepals dark blue, apex rounded, puberulent, lateral sepals forward pointing, 17-24 × 7-9 mm, spurs straight to slightly decurved, ascending 30-60° above horizontal, 15-17 mm; lower petal blades ± covering stamens, 5-7 mm, clefts 0.5-1.5 mm; hairs sparse, local, centered, mostly above base of cleft, white. |
sepals dark blue to light blue, puberulent, lateral sepals spreading, 9-15 × 5-7 mm, spurs straight, ascending ca. 45(-90)°, 10-15(-19) mm; lower petal blades elevated, exposing stamens, 4-7 mm, clefts 2-4 mm; hairs centered, densest on inner lobes near base of cleft, white. |
Fruits | 14-17 mm, 3.5-4 times longer than wide, pubescent. |
15-21 mm, 3.5-4.5 times longer than wide, nearly glabrous. |
Seeds | wing-margined; seed coat cells ± elongate, surfaces roughened. |
seed coat cells with surfaces pustulate. |
Delphinium brachycentrum |
Delphinium madrense |
|
Phenology | Flowering summer. | Flowering spring–early summer. |
Habitat | Well-drained tundra slopes | Calcareous slopes, oak woods or desert scrub |
Elevation | 0-1600 m (0-5200 ft) | 300-2100 m (1000-6900 ft) |
Distribution |
AK; YT; e Asia |
TX; Mexico (Coahuila, Nuevo León, and Tamaulipas) |
Discussion | Hybrids with Delphinium glaucum are known as D. ×nutans A. Nelson. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Delphinium madrense hybridizes with D. carolinianum subspp. vimineum and virescens. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Exaltata | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Virescens |
Sibling taxa | ||
Synonyms | D. chamissonis | |
Name authority | Ledebour: Fl. Ross. 1: 60. (1841) | S. Watson: Proc. Amer. Acad. Arts 17: 141. (1890) |
Web links |