Delphinium exaltatum |
Delphinium wootonii |
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tall larkspur |
Organ Mountain larkspur, Wooton's larkspur |
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Stems | 70-200 cm; base reddish, nearly glabrous. |
(15-)30-50(-60) cm; base sometimes reddish, pubescent. |
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 reniform to fan-shaped, 1.5-3 × 2.5-4 cm, puberulent; ultimate lobes 5-24, width 2-6 mm (basal), 1-3 mm (cauline). |
Inflorescences | 8-30-flowered; pedicel 0.5-2 cm, puberulent; bracteoles 2-4 mm from flowers, green, linear, 2-4 mm, puberulent. |
15-30(-49)-flowered; pedicel 1-2(-3.6) cm, puberulent; bracteoles 1-5 mm from flowers, green, linear, 1-4(-12) 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 white to lavender, nearly glabrous, lateral sepals usually reflexed, (6-)8-13 × 3-7 mm, spur straight, ascending 30-80° above horizontal, (8-)13-20(-25) mm; lower petal blades ± elevated, 6-9 mm, cleft 2.5-4.5 mm; hairs centered, densest near base of cleft, white. |
Fruits | 7-12 mm, 2-2.5 times longer than wide, ± puberulent. |
(10-)11-20(-24) mm, 3-3.5 times longer than wide, glabrous. |
Seeds | ± wing-margined; seed coat cells elongate, surfaces smooth. |
seed coat cells with surfaces pustulate. |
2n | = 16. |
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Delphinium exaltatum |
Delphinium wootonii |
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Phenology | Flowering summer. | Flowering spring. |
Habitat | Rocky slopes in open deciduous woods and barrens, mainly on calcareous substrates, also shale and mafic and ultramafic rocks | Oak woods, grasslands, desert scrub |
Elevation | 150-2000 m (500-6600 ft) | 700-1800 m (2300-5900 ft) |
Distribution |
AL; KY; MD; MO; NC; OH; PA; TN; VA; WV
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AZ; CO; NM; TX; Mexico (Sonora, Chihuahua, and Coahuila)
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Discussion | Delphinium wootonii hybridizes with D. madrense in the eastern Big Bend area of Texas, and with D. carolinianum subsp. virescens. (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. Virescens |
Sibling taxa | ||
Synonyms | D. virescens subsp. wootonii | |
Name authority | Aiton: Hort. Kew. 2: 244. (1789) | Rydberg: Bull. Torrey Bot. Club 26: 587. (1900) |
Web links |