Delphinium basalticum |
Delphinium geraniifolium |
|
---|---|---|
basalt larkspur, basaltic larkspur, Columbia Gorge larkspur |
Clark Valley larkspur, Mogollon larkspur |
|
Stems | 20-50(-65) cm; base often reddish, puberulent. |
60-100 cm; base reddish, puberulent, midstems pubescent. |
Leaves | blade round, 2-6 × 5-9 cm, not succulent, nearly glabrous; ultimate lobes 5-19, width 3-15 mm (basal), 1-12 mm (cauline). |
blade dark green, at least adaxially, fan-shaped to reniform, 2-5 × 3-7 cm, pubescent, especially abaxially; ultimate lobes 5-15, width 4-15 mm (basal lobes 5-15 mm), apex abruptly tapered, usually mucronate; veins prominent. |
Inflorescences | (2-)6-16(-26)-flowered; pedicel 2-7 cm, nearly glabrous; bracteoles 4-12 mm from flowers, green, linear, 3-7 mm, nearly glabrous. |
20-90-flowered, dense, cylindric; pedicel ascending to spreading, 1-2 cm, puberulent; bracteoles 1-2 mm from flowers, green, linear, 4-6 mm, puberulent. |
Flowers | sepals dark blue, nearly glabrous, lateral sepals spreading, 15-21 × 7-10 mm, spur straight to decurved, ascending 30-45° above horizontal, 14-18 mm; lower petal blades slightly elevated, ± exposing stamens, 7-9 mm, cleft 4-5 mm; hairs centered, mostly on inner lobes above base of cleft, yellow to white. |
sepals dark blue to purple, puberulent, lateral sepals spreading to slightly forward pointing, 10-14 × 3-5 mm, spurs ascending 20-70°, truncate or downcurved apically, 12-15 mm; lower petal blades slightly elevated, ± exposing stamens, 4-6 mm, clefts 0.5-2 mm; hairs sparse, local below junction of blade and claw, scattered on margins, white. |
Fruits | 12-17 mm, 3.5-4 times longer than wide, glabrous. |
13-18 mm, 3-3.5 times longer than wide, puberulent. |
Seeds | ± wing-margined; seed coat cells with surfaces smooth. |
unwinged; seed coat cells with margins straight, surfaces ± roughened. |
2n | = 16. |
|
Delphinium basalticum |
Delphinium geraniifolium |
|
Phenology | Flowering spring (-early summer). | Flowering summer. |
Habitat | Basaltic cliff faces, n and e slopes at base of cliffs | Heavy clay soil, dry meadows in coniferous woods |
Elevation | 200-500 m (700-1600 ft) | 1800-3400 m (5900-11200 ft) |
Distribution |
OR; WA |
AZ; NM
|
Discussion | Of conservation concern. Hybrids between Delphinium basalticum and D. trolliifolium are known. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Delphinium geraniifolium is a more pubescent analog of the closely related D. scopulorum, the former occurring in heavier soils at higher elvation. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Bicoloria | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Wislizenana |
Sibling taxa | ||
Synonyms | D. tenuisectum subsp. amplibracteatum | |
Name authority | M. J. Warnock: Phytologia 78: 91. (1995) | Rydberg: Bull. Torrey Bot. Club 26: 583. (1899) |
Web links |