Delphinium nuttallii subsp. ochroleucum(synonym of Delphinium leucophaeum) |
Delphinium brachycentrum |
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pale larkspur, white rock larkspur |
arctic larkspur, northern larkspur |
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Stems | 30-60 cm. |
20-50(-80) cm; base often reddish, pubescent. |
Leaves | blade round to pentagonal, 1.5-6 × 3-11 cm, puberulent; ultimate lobes 5-15, width 1-7(-15) mm. |
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Inflorescences | 5-18-flowered; pedicel 1-4.5 cm, pubescent; bracteoles 2-7 mm from flowers, blue, linear, 5-8 mm, puberulent. |
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Flowers | sepals white or light yellow, spurs 9-11 mm; lower petal blades 4-6 mm. |
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 | 14-17 mm, 3.5-4 times longer than wide, pubescent. |
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Seeds | wing-margined; seed coat cells ± elongate, surfaces roughened. |
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2n | = 16. |
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Delphinium nuttallii subsp. ochroleucum |
Delphinium brachycentrum |
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Phenology | Flowering late spring. | Flowering summer. |
Habitat | Rock outcrops, rocky meadows | Well-drained tundra slopes |
Elevation | 50-100 m (200-300 ft) | 0-1600 m (0-5200 ft) |
Distribution |
OR
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AK; YT; e Asia |
Discussion | Of conservation concern. The range of morphologic features of Delphinium nuttallii subsp. ochroleucum (D. leucophaeum) is almost completely encompassed within that of D. nuttallii subsp. nuttallii. Sepal color is the only feature consistently separating the two subspecies. Were it not for the fact that any given population typically has plants of only one flower color, a rank of forma would be more appropriate. (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. Grumosa > Delphinium nuttallii | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Exaltata |
Sibling taxa | ||
Synonyms | D. menziesii var. (ß) ochroleucum, D. leucophaeum | D. chamissonis |
Name authority | (Nuttall) M. J. Warnock: Phytologia 78: 98. (1995) | Ledebour: Fl. Ross. 1: 60. (1841) |
Web links |