Delphinium xantholeucum |
Delphinium geyeri |
|
---|---|---|
yellow-white larkspur |
Geyer's larkspur, poisonweed |
|
Stems | 40-60(-100) cm; base often reddish, glabrous, ± glaucous. |
(15-)30-60(-80) cm; base usually 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 light green, ± round, 1-5 × 1-6 cm, densely pubescent; ultimate lobes 7-20, width 2-5 mm (basal), 2-4 mm (cauline), apex gradually tapering to point; veins obscure. |
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. |
6-30(-60)-flowered, ± open, cylindric; pedicel ascending to spreading, 1-3(-4) cm, puberulent; bracteoles 1-3 mm from flowers, green, lanceolate, 3-6 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 bright blue, puberulent, lateral sepals spreading, 10-18 × 4-8 mm, spurs straight to slightly downcurved, ascending 0-30°, 11-16 mm; lower petal blades slightly elevated, ± exposing stamens, 4-8 mm, clefts 0.5-2 mm; hairs centered, densest on inner lobes near base of cleft, white to light yellow. |
Fruits | 15-22 mm, 3-4 times longer than wide, glabrous to glandular-puberulent. |
11-15 mm, 3-3.5 times longer than wide, sparse puberulent. |
Seeds | seed coat cells narrow, short, cell margins straight, surfaces smooth. |
unwinged; seed coat cells with margins straight, surfaces ± roughened. |
2n | = 16. |
= 16. |
Delphinium xantholeucum |
Delphinium geyeri |
|
Phenology | Flowering spring. | Flowering late spring–early summer. |
Habitat | Slopes in open yellow pine forests, grasslands, sage scrub | Grasslands or Artemisia-Cercocarpus scrub |
Elevation | 150-600 m (500-2000 ft) | 1400-3000 m (4600-9800 ft) |
Distribution |
WA
|
CO; MT; NE; UT; 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.) |
Apparently closely related to Delphinium stachydeum, D. geyeri is generally smaller, earlier flowering, with more finely dissected leaves and a more eastern geographic distribution. (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. Wislizenana |
Sibling taxa | ||
Name authority | Piper: Contr. U.S. Natl. Herb. 11: 280. (1906) | Greene: Erythea 2: 189. (1894) |
Web links |