Delphinium xantholeucum |
Delphinium patens |
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yellow-white larkspur |
spreading larkspur, spreading or zigzag larkspur, zigzag larkspur |
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Stems | 40-60(-100) cm; base often reddish, glabrous, ± glaucous. |
(10-)20-50(-90) cm; base reddish, glabrous to puberulent. |
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Leaves | blade round, 2-6 × 4-10 cm, nearly glabrous; ultimate lobes 3-15, width 3-8 mm (basal), 1-5 mm (cauline). |
blade round to pentagonal, 1-5.5 × 2-7.5 cm, nearly glabrous; ultimate lobes 3-9, less often wedge-shaped, 5 or more extending more than 3/5 distance to petiole, width 5-30(-50) mm (basal), 1-15 mm (cauline), widest at middle or in proximal 1/2. |
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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. |
4-25(-36)-flowered; pedicel spreading from rachis at usually less than 70°, 1-4(-8) cm, glabrous to glandular; bracteoles 3-12(-23) mm from flowers, blue to green, linear, 3-8(-16) mm, glabrous to glandular. |
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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 dark blue, usually retaining color upon drying, glabrous, lateral sepals reflexed, (6-)10-15(-20) × 4-8 mm, spurs straight, ascending ca. 30° above horizontal, 8-18 mm; lower petal blades elevated, exposing stamens, 3-6(-8) mm, clefts 1-3 mm; hairs centered on base of cleft or on inner lobes, scattered, white, rarely yellow. |
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Fruits | 15-22 mm, 3-4 times longer than wide, glabrous to glandular-puberulent. |
12-23 mm, 3.3-3.6 times longer than wide, glabrous or puberulent. |
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Seeds | seed coat cells narrow, short, cell margins straight, surfaces smooth. |
unwinged; seed coats ± pitted, cell surfaces roughened. |
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2n | = 16. |
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Delphinium xantholeucum |
Delphinium patens |
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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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CA
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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.) |
Subspecies 3 (3 in the flora). (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. Subscaposa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Grumosa | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Name authority | Piper: Contr. U.S. Natl. Herb. 11: 280. (1906) | Bentham: Pl. Hartw., 296. (1849) | ||||||||
Web links |