Delphinium xantholeucum |
Delphinium distichum |
|
---|---|---|
yellow-white larkspur |
Burke's larkspur, meadow larkspur, strict larkspur, two-spike larkspur |
|
Stems | 40-60(-100) cm; base often reddish, glabrous, ± glaucous. |
(25-)30-60(-80) cm; base sometimes 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 cuneate to semicircular, 1-5 × 1.5-7 cm, puberulent; ultimate lobes 5-19, width 2-8(-15) mm (basal), 0.5-3(-5) mm (cauline); margins of basal leaf, measured less than 1 cm from blade base, demarcating considerably more than 90° of arc when leaf laid flat; most cauline leaf blades exceeding internodes. |
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. |
8-30(-40)-flowered, usually dense; pedicel 0.5-1.5 cm, puberulent; bracteoles 0-3 mm from flowers, green to blue, linear, 4-8 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 bluish purple, puberulent, lateral sepals ± erect, 8-12 × 3.5-5 mm, spurs straight, horizontal or nearly so, 9-15 mm; lower petal blades ± covering stamens, 4.5-6.5 mm, clefts 2-3 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, 3.5-4 times longer than wide, ± puberulent. |
Seeds | seed coat cells narrow, short, cell margins straight, surfaces smooth. |
seed coat cells with surfaces roughened. |
2n | = 16. |
= 16. |
Delphinium xantholeucum |
Delphinium distichum |
|
Phenology | Flowering spring. | Flowering late spring–early summer. |
Habitat | Slopes in open yellow pine forests, grasslands, sage scrub | Wet meadows |
Elevation | 150-600 m (500-2000 ft) | 100-2400 m (300-7900 ft) |
Distribution |
WA
|
ID; MT; OR; WA; WY; BC
|
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 distichum hybridizes with D. multiplex and D. nuttallianum (D. ×diversicolor Rydberg). The name D. burkei has often been misapplied to D. distichum. (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. Depauperata |
Sibling taxa | ||
Synonyms | D. strictum var. distichiflorum | |
Name authority | Piper: Contr. U.S. Natl. Herb. 11: 280. (1906) | Geyer ex Hooker: J. Bot. 6: 68. (1847) |
Web links |
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