Delphinium luteum |
Delphinium brachycentrum |
|
---|---|---|
golden larkspur, yellow larkspur |
arctic larkspur, northern larkspur |
|
Stems | 20-40(-55) cm; base often reddish, nearly glabrous. |
20-50(-80) cm; base often reddish, pubescent. |
Leaves | blade round to pentagonal, 1-5 × 2-10 cm, nearly glabrous; ultimate lobes 3-5, width 8-30 mm (basal), 5-15 mm (cauline). |
blade round to pentagonal, 1.5-6 × 3-11 cm, puberulent; ultimate lobes 5-15, width 1-7(-15) mm. |
Inflorescences | 5-25(-37)-flowered; pedicel (1-)3-5(-7) cm, puberulent; bracteoles 6-10(-17) mm from flowers, green, linear-lanceolate, 6-7 mm, nearly glabrous. |
5-18-flowered; pedicel 1-4.5 cm, pubescent; bracteoles 2-7 mm from flowers, blue, linear, 5-8 mm, puberulent. |
Flowers | sepals bright yellow, puberulent, appearing waxy, lateral sepals ± forward pointing, (11-)14-16 × (6-)9-13 mm, spur straight, ca. 30° below horizontal, 11-20 mm; lower petal blades elevated, exposing stamens, 3-4 mm, clefts 0.5-1.5 mm; hairs sparse or absent, ± evenly distributed if present, white to yellow. |
sepals dark blue, apex rounded, puberulent, lateral sepals forward pointing, 17-24 × 7-9 mm, spurs straight to slightly decurved, ascending 30-60° above horizontal, 15-17 mm; lower petal blades ± covering stamens, 5-7 mm, clefts 0.5-1.5 mm; hairs sparse, local, centered, mostly above base of cleft, white. |
Fruits | 11-14 mm, 3.5-4.5 times longer than wide, glabrous. |
14-17 mm, 3.5-4 times longer than wide, pubescent. |
Seeds | unwinged; seed coat cell surfaces smooth. |
wing-margined; seed coat cells ± elongate, surfaces roughened. |
Delphinium luteum |
Delphinium brachycentrum |
|
Phenology | Flowering late winter-mid spring. | Flowering summer. |
Habitat | Wet cliffs, coastal grassland or chaparral | Well-drained tundra slopes |
Elevation | 0-50 m (0-200 ft) | 0-1600 m (0-5200 ft) |
Distribution |
CA
|
AK; YT; e Asia |
Discussion | Of conservation concern. Delphinium luteum is presently known from only three populations. It is known to hybridize with D. decorum and with D. nudicaule. Populations of D. hesperium subsp. hesperium also occur at the type locality; D. luteum flowers earlier and hybrids are not known. Delphinium luteum is not likely to be mistaken for any other species of Delphinium. It has been treated as a variety of D. nudicaule and is closely related to that species. Sepals of the infrequent yellow-flowered phase of D. nudicaule, however, have a much drabber appearance compared with the bright shining yellow of the sepals in D. luteum. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Hybrids with Delphinium glaucum are known as D. ×nutans A. Nelson. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Bicoloria | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Exaltata |
Sibling taxa | ||
Synonyms | D. chamissonis | |
Name authority | A. Heller: Bull. S. Calif. Acad. Sci. 6: 68. (1903) | Ledebour: Fl. Ross. 1: 60. (1841) |
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