Delphinium nuttallii subsp. ochroleucum(synonym of Delphinium leucophaeum) |
Delphinium ramosum |
|
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pale larkspur, white rock larkspur |
mountain larkspur |
|
Stems | 30-60 cm. |
(45-)70-100 cm; base sometimes reddish, puberulent. |
Leaves | blade round to pentagonal, 2-8 × 4-14 cm, nearly glabrous; ultimate lobes 5-21, width 1-5 mm; midcauline leaf lobes more than 3 times longer than wide. |
|
Inflorescences | (10-)15-40(-120)-flowered; pedicel 1-2.5(-4) cm, puberulent; bracteoles 1-3 mm from flowers, green, sometimes margins white, linear or lanceolate, 3-5(-8) mm, puberulent. |
|
Flowers | sepals white or light yellow, spurs 9-11 mm; lower petal blades 4-6 mm. |
sepals bright dark blue, apex rounded, puberulent, lateral sepals forward pointing to spreading, 11-13 × 4-6 mm, spurs straight, ascending ca. 30° above horizontal, 9-13 mm; lower petal blades ± covering stamens, 5-7 mm, clefts 2-3 mm; hairs centered above base of cleft, white. |
Fruits | 11-17 mm, 3-4 times longer than wide, puberulent. |
|
Seeds | wing-margined; seed coat cells narrow, short, surfaces roughened. |
|
2n | = 16. |
= 16. |
Delphinium nuttallii subsp. ochroleucum |
Delphinium ramosum |
|
Phenology | Flowering late spring. | Flowering summer. |
Habitat | Rock outcrops, rocky meadows | Meadows, aspen woodlands, Artemisia scrub |
Elevation | 50-100 m (200-300 ft) | 2100-3200(-3400) m (6900-10500(-11200) ft) |
Distribution |
OR
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CO; NM
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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.) |
Delphinium ramosum hybridizes with D. barbeyi and D. glaucum. (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 | |
Name authority | (Nuttall) M. J. Warnock: Phytologia 78: 98. (1995) | Rydberg: Bull. Torrey Bot. Club 28: 276. (1901) |
Web links |