Delphinium xantholeucum |
Delphinium madrense |
|
---|---|---|
yellow-white larkspur |
Edwards' Plateau larkspur, Sierra madre larkspur |
|
Stems | 40-60(-100) cm; base often reddish, glabrous, ± glaucous. |
30-80(-100) cm; base often reddish, puberulent. |
Leaves | blade round, 2-6 × 4-10 cm, nearly glabrous; ultimate lobes 3-15, width 3-8 mm (basal), 1-5 mm (cauline). |
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 | 10-20(-60)-flowered, narrowly pyramidal; pedicel spreading, yellowish, 1.5-3 cm, ± glandular-puberulent; bracteoles 6-12 mm from flowers, green to light brown, linear to lanceolate, 4-7 mm, nearly glabrous. |
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 yellow, glabrous, lateral sepals reflexed, 9-12 × 3-5 mm, spurs straight, ascending ca. 45° above horizontal, 11-15 mm; lower petal blades elevated, exposing stamens, 3-5 mm, clefts 1-2 mm; hairs centered mostly on inner lobes near 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 | 15-22 mm, 3-4 times longer than wide, glabrous to glandular-puberulent. |
15-21 mm, 3.5-4.5 times longer than wide, nearly glabrous. |
Seeds | seed coat cells narrow, short, cell margins straight, surfaces smooth. |
seed coat cells with surfaces pustulate. |
2n | = 16. |
|
Delphinium xantholeucum |
Delphinium madrense |
|
Phenology | Flowering spring. | Flowering spring–early summer. |
Habitat | Slopes in open yellow pine forests, grasslands, sage scrub | Calcareous slopes, oak woods or desert scrub |
Elevation | 150-600 m (500-2000 ft) | 300-2100 m (1000-6900 ft) |
Distribution |
WA
|
TX; Mexico (Coahuila, Nuevo León, and Tamaulipas) |
Discussion | Of conservation concern. Delphinium xantholeucum is very local; much of the habitat of this species has been converted to orchards. (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. Subscaposa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Virescens |
Sibling taxa | ||
Name authority | Piper: Contr. U.S. Natl. Herb. 11: 280. (1906) | S. Watson: Proc. Amer. Acad. Arts 17: 141. (1890) |
Web links |