Delphinium hansenii |
Delphinium wootonii |
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Eldorado larkspur, Hansen's delphinium, Hansen's larkspur |
Organ Mountain larkspur, Wooton's larkspur |
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Stems | (25-)40-80(-180) cm; base usually reddish, pubescent. |
(15-)30-50(-60) cm; base sometimes reddish, pubescent. |
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Leaves | blade pentagonal, 1.5-5 × 2.5-8 cm, long-pubescent, especially abaxially; ultimate lobes 0-18, width 4-20 mm (basal), 2-9 mm (cauline). |
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). |
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Inflorescences | (9-)15-40(-160)-flowered, dense to open; pedicel 0.3-2.5(-6) cm, puberulent; bracteoles 1-5(-8) mm from flowers, green, sometimes white-margined, linear-lanceolate, 2-6(-8) 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. |
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Flowers | sepals violet to white, ± puberulent, lateral sepals spreading to forward pointing, 7-10(-13) × 3-6(-8) mm, spurs gently upcurved, ascending 0-30° above horizontal, (6-)9-13(-16) mm; lower petal blades elevated, ± exposing stamens, 3-7 mm, cleft 1-2(-4) mm; hairs centered, densest on inner lobes 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. |
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Fruits | 8-20 mm, 2.2-4 times longer than wide, glabrous. |
(10-)11-20(-24) mm, 3-3.5 times longer than wide, glabrous. |
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Seeds | echinate, appearing fuzzy to naked eye; seed coat cells with margins straight, surfaces sparsely pustulate. |
seed coat cells with surfaces pustulate. |
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2n | = 16. |
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Delphinium hansenii |
Delphinium wootonii |
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Phenology | Flowering spring. | |||||||||
Habitat | Oak woods, grasslands, desert scrub | |||||||||
Elevation | 700-1800 m (2300-5900 ft) | |||||||||
Distribution |
CA
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AZ; CO; NM; TX; Mexico (Sonora, Chihuahua, and Coahuila)
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Discussion | Subspecies 3 (3 in the flora). Although Delphinium hansenii has often been confused with D. hesperium, seeds will instantly allow identification. Seeds of Delphinium hansenii are, as far as known, unique, bearing numerous, elongate, prismlike raised structures (extensions of single cells or small groups of cells) over the entire seed coat. If seeds are absent, larger flowers, more open inflorescences (except in D. hesperium subsp. cuyamacae), and general absence of pubescence of long hairs in D. hesperium are apparent upon comparison of the two species. Separating D. hansenii from D. variegatum may also be difficult. Again, seeds leave no doubt. In addition, smaller flowers and greater number of flowers per plant of D. hansenii should serve to distinguish D. hansenii from D. variegatum. White-flowered D. hansenii has been confused with D. gypsophilum and with D. hesperium subsp. pallescens. Other than seeds, pubescence of long hairs and smaller flowers present in D. hansenii and absent in the others will distinguish them. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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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Key |
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Source | FNA vol. 3. | FNA vol. 3. | ||||||||
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Echinata | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Virescens | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | D. hesperium var. hansenii | D. virescens subsp. wootonii | ||||||||
Name authority | (Greene) Greene: Pittonia 3: 94. (1896) | Rydberg: Bull. Torrey Bot. Club 26: 587. (1900) | ||||||||
Web links |