Delphinium xantholeucum |
Delphinium glaucescens |
|
---|---|---|
yellow-white larkspur |
glaucous larkspur, glaucus larkspur, smooth larkspur |
|
Stems | 40-60(-100) cm; base often reddish, glabrous, ± glaucous. |
35-70(-100) cm; base ± reddish, glabrous, glaucous. |
Leaves | blade round, 2-6 × 4-10 cm, nearly glabrous; ultimate lobes 3-15, width 3-8 mm (basal), 1-5 mm (cauline). |
blade pentagonal to round, 2-9 × 3-14 cm, margins seldom laciniate, nearly glabrous; ultimate lobes 5-17, width 2-8 mm, tips abruptly tapered to mucronate apex; midcauline leaf lobes more than 3 times longer than wide. |
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. |
10-25-flowered; pedicel 0.5-1.5 cm, puberulent to glabrous; bracteoles 2-20 mm from flowers, green, linear, 3-8 mm, nearly glabrous. |
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, nearly glabrous, lateral sepals spreading to reflexed, 8-12 × 3-4 mm, spurs straight, ascending 40-90°, 9-13 mm; lower petal blades ± covering stamens, 3-5 mm, clefts 1-2 mm; hairs centered, mostly near base of cleft, white. |
Fruits | 15-22 mm, 3-4 times longer than wide, glabrous to glandular-puberulent. |
7-13 mm, 3.4-4 times longer than wide, puberulent. |
Seeds | seed coat cells narrow, short, cell margins straight, surfaces smooth. |
± wing-margined; seed coat cells narrow but short, surfaces smooth. |
2n | = 16. |
|
Delphinium xantholeucum |
Delphinium glaucescens |
|
Phenology | Flowering spring. | Flowering summer. |
Habitat | Slopes in open yellow pine forests, grasslands, sage scrub | Rocky slopes in subalpine coniferous woods |
Elevation | 150-600 m (500-2000 ft) | 2000-4000 m (6600-13100 ft) |
Distribution |
WA
|
ID; MT; WY
|
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.) |
Hybrids with Delphinium glaucum are known. (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. Exaltata |
Sibling taxa | ||
Name authority | Piper: Contr. U.S. Natl. Herb. 11: 280. (1906) | Rydberg: Mem. New York Bot. Gard. 1: 155. (1900) |
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