Delphinium exaltatum |
Delphinium newtonianum |
|
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tall larkspur |
newton's larkspur, Ozark larkspur |
|
Stems | 70-200 cm; base reddish, nearly glabrous. |
40-90 cm; base often reddish, puberulent. |
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 pentagonal, 4-7 × 5-15 cm, nearly glabrous; ultimate lobes 3-7, width 8-20 mm (basal), 5-15 mm (cauline), widest at middle or in proximal 1/2. |
Inflorescences | 8-30-flowered; pedicel 0.5-2 cm, puberulent; bracteoles 2-4 mm from flowers, green, linear, 2-4 mm, puberulent. |
8-20(-40)-flowered, as wide as long or nearly so; pedicel 1-4(-6) cm, pubescent; bracteoles 6-15 mm from flowers, green, linear, 1.5-5 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 to light blue, rarely white, glabrous, lateral sepals spreading, 12-14 × 6-7 mm, spurs straight to decurved, within 30° of horizontal, 10-15 mm; lower petal blades slightly elevated, ± exposing stamens, 4-5 mm, clefts 2-3 mm; hairs mostly centered near base of cleft, yellow. |
Fruits | 7-12 mm, 2-2.5 times longer than wide, ± puberulent. |
8-12 mm, 3-3.5 times longer than wide, nearly glabrous. |
Seeds | ± wing-margined; seed coat cells elongate, surfaces smooth. |
unwinged; surface of each seed coat cell with swollen, blunt, hairlike structures, barely visible at 20x, otherwise smooth. |
Delphinium exaltatum |
Delphinium newtonianum |
|
Phenology | Flowering summer. | Flowering early summer. |
Habitat | Rocky slopes in open deciduous woods and barrens, mainly on calcareous substrates, also shale and mafic and ultramafic rocks | Slopes in deciduous forest |
Elevation | 150-2000 m (500-6600 ft) | 500-700 m (1600-2300 ft) |
Distribution |
AL; KY; MD; MO; NC; OH; PA; TN; VA; WV
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AR |
Discussion | No cases of hybridization are known. Delphinium newtonianum often occurs in mixed populations with D. tricorne. It normally does not begin flowering until 4-6 weeks after D. tricorne has finished. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Exaltata | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Grumosa |
Sibling taxa | ||
Name authority | Aiton: Hort. Kew. 2: 244. (1789) | D. M. Moore: Rhodora 41: 196. (1939) |
Web links |