Delphinium nuttallii subsp. ochroleucum(synonym of Delphinium leucophaeum) |
Delphinium exaltatum |
|
---|---|---|
pale larkspur, white rock larkspur |
tall larkspur |
|
Stems | 30-60 cm. |
70-200 cm; base reddish, nearly glabrous. |
Leaves | blade pentagonal, 2-7 × 3-9 cm, puberulent; ultimate lobes 3-7, width 5-25 mm; midcauline leaf lobes less than 3 times longer than wide. |
|
Inflorescences | 8-30-flowered; pedicel 0.5-2 cm, puberulent; bracteoles 2-4 mm from flowers, green, linear, 2-4 mm, puberulent. |
|
Flowers | sepals white or light yellow, spurs 9-11 mm; lower petal blades 4-6 mm. |
sepals whitish to pale lavender or purple, puberulent, lateral sepals forward pointing, 9-11 × 4-6 mm, spurs straight, as much as 45° above or below horizontal, 9-12 mm; lower petal blades ± covering stamens, 3-5 mm, clefts 1-2 mm; hairs centered, mostly near base of cleft, white. |
Fruits | 7-12 mm, 2-2.5 times longer than wide, ± puberulent. |
|
Seeds | ± wing-margined; seed coat cells elongate, surfaces smooth. |
|
2n | = 16. |
|
Delphinium nuttallii subsp. ochroleucum |
Delphinium exaltatum |
|
Phenology | Flowering late spring. | Flowering summer. |
Habitat | Rock outcrops, rocky meadows | Rocky slopes in open deciduous woods and barrens, mainly on calcareous substrates, also shale and mafic and ultramafic rocks |
Elevation | 50-100 m (200-300 ft) | 150-2000 m (500-6600 ft) |
Distribution |
OR
|
AL; KY; MD; MO; NC; OH; PA; TN; VA; WV
|
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.) |
|
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) | Aiton: Hort. Kew. 2: 244. (1789) |
Web links |