Delphinium xantholeucum |
Delphinium sect. Diedropetala |
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yellow-white larkspur |
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Roots | 2-80 cm, tuberlike or fibrous, dry or fleshy; buds often less than 3 mm. |
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Stems | 40-60(-100) cm; base often reddish, glabrous, ± glaucous. |
1-8(-19) per root; base firmly attached to root or not. |
Leaves | blade round, 2-6 × 4-10 cm, nearly glabrous; ultimate lobes 3-15, width 3-8 mm (basal), 1-5 mm (cauline). |
cauline and/or in basal rosette, gradually or abruptly reduced into bracts. |
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. |
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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 blue, purple, white, red, or yellow; lower petal blades often same color as lateral sepals, usually greater than 1/5 length of lateral sepals (exceptions in red- and yellow-flowered species). |
Fruits | 15-22 mm, 3-4 times longer than wide, glabrous to glandular-puberulent. |
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Seeds | seed coat cells narrow, short, cell margins straight, surfaces smooth. |
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2n | = 16. |
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Delphinium xantholeucum |
Delphinium sect. Diedropetala |
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Phenology | Flowering spring. | |
Habitat | Slopes in open yellow pine forests, grasslands, sage scrub | |
Elevation | 150-600 m (500-2000 ft) | |
Distribution |
WA
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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.) |
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Source | FNA vol. 3. | FNA vol. 3, p. 197. |
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Subscaposa | Ranunculaceae > Delphinium |
Sibling taxa | ||
Subordinate taxa | ||
Name authority | Piper: Contr. U.S. Natl. Herb. 11: 280. (1906) | Huth: Bot. Jahrb. Syst. 20: 420. (1895) |
Web links |