Delphinium exaltatum |
Delphinium barbeyi |
|
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tall larkspur |
Barbey larkspur, Barbey's larkspur, subalpine larkspur, tall larkspur |
|
Stems | 70-200 cm; base reddish, nearly glabrous. |
50-150 cm; base green, 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. |
blade round to reniform, 4-8 × 7-15 cm, glabrous; ultimate lobes 5-9, width 8-50 mm. |
Inflorescences | 8-30-flowered; pedicel 0.5-2 cm, puberulent; bracteoles 2-4 mm from flowers, green, linear, 2-4 mm, puberulent. |
10-50-flowered; pedicel 0.5-6 cm, glandular-puberulent; bracteoles 1-4(-8) mm from flowers, blue to green, awl-shaped, 5-14 mm, puberulent. |
Flowers | 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. |
sepals dark bluish purple, sparsely puberulent, lateral sepals forward pointing, 13-23 × 5-8 mm, spurs ascending ca. 45°, downcurved apically, 10-18 mm; lower petal blades ± covering stamens, 4-7 mm, clefts 2-3 mm; hairs centered, mostly near base of cleft, sparse elsewhere, white or yellow. |
Fruits | 7-12 mm, 2-2.5 times longer than wide, ± puberulent. |
17-22 mm, 2.5-3 times longer than wide, puberulent. |
Seeds | ± wing-margined; seed coat cells elongate, surfaces smooth. |
wing-margined; seed coat cells narrow but short, surfaces pustulate. |
2n | = 16. |
|
Delphinium exaltatum |
Delphinium barbeyi |
|
Phenology | Flowering summer. | Flowering summer. |
Habitat | Rocky slopes in open deciduous woods and barrens, mainly on calcareous substrates, also shale and mafic and ultramafic rocks | Subalpine and alpine sites in wet soils |
Elevation | 150-2000 m (500-6600 ft) | 2500-4100 m (8200-13500 ft) |
Distribution |
AL; KY; MD; MO; NC; OH; PA; TN; VA; WV
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AZ; CO; NM; UT; WY
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Discussion | Delphinium barbeyi hybridizes extensively with D. glaucum in western Colorado and eastern Utah, where plants appearing to be hybrid [D. ×occidentale (S. Watson) S. Watson] are often far more common than plants of either putative parent. Several other names have been used for these plants, including D. elatum var. occidentale S. Watson, D. abietorum Tidestrom, and D. scopulorum subsp. occidentale (S. Watson) Abrams. Delphinium barbeyi is also known to hybridize with D. ramosum and D. sapellonis. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Exaltata | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Exaltata |
Sibling taxa | ||
Synonyms | D. exaltatum var. (e) barbeyi, D. occidentale var. barbeyi | |
Name authority | Aiton: Hort. Kew. 2: 244. (1789) | (Huth) Huth: Bull. Herb. Boissier 1: 335. (1893) |
Web links |