Delphinium exaltatum |
Delphinium treleasei |
|
---|---|---|
tall larkspur |
glade larkspur, Trelease's larkspur |
|
Stems | 70-200 cm; base reddish, nearly glabrous. |
(40-)60-80(-110) cm; base reddish, glabrous, glaucous. |
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, 0.5-8 × 2-20 cm, glabrous; ultimate lobes 3-35(-56), 5 or more extending more than 3/5 distance to petiole, width 2-6 mm (basal), 0.5-2 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. |
5-30(-56)-flowered; pedicel (1-)2.5-7(-11) cm, glabrous; bracteoles 1-7(-46) mm from flowers, blue or green, awl-shaped, 1.5-4(-12) mm, glabrous. |
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 bright blue, usually retaining color upon drying, nearly glabrous, lateral sepals spreading, (10-)12-17(-20) × 4-8(-10) mm, spurs straight, ascending ca. 45°, 15-17 mm; lower petal blades ± covering stamens, 5-8 mm, clefts (1-)3-5 mm; hairs centered, densest above base of cleft, yellow. |
Fruits | 7-12 mm, 2-2.5 times longer than wide, ± puberulent. |
12-18(-22) mm, 3-4 times longer than wide, glabrous. |
Seeds | ± wing-margined; seed coat cells elongate, surfaces smooth. |
unwinged; seed coat cell surfaces smooth. |
2n | = 16. |
|
Delphinium exaltatum |
Delphinium treleasei |
|
Phenology | Flowering summer. | Flowering late spring. |
Habitat | Rocky slopes in open deciduous woods and barrens, mainly on calcareous substrates, also shale and mafic and ultramafic rocks | Open juniper glades on calcareous substrate |
Elevation | 150-2000 m (500-6600 ft) | 250-450 m (800-1500 ft) |
Distribution |
AL; KY; MD; MO; NC; OH; PA; TN; VA; WV
|
AR; MO |
Discussion | Delphinium treleasei is locally abundant but extremely limited by microhabitat within its distributional range. Hybrids between Delphinium treleasei and D. carolinianum subsp. carolinianum are known. (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) | Bush ex K. C. Davis: Minnesota Bot. Stud. 2: 444. (1900) |
Web links |