Delphinium distichum |
Delphinium geyeri |
|
---|---|---|
Burke's larkspur, meadow larkspur, strict larkspur, two-spike larkspur |
Geyer's larkspur, poisonweed |
|
Stems | (25-)30-60(-80) cm; base sometimes reddish, puberulent. |
(15-)30-60(-80) cm; base usually reddish, puberulent. |
Leaves | blade cuneate to semicircular, 1-5 × 1.5-7 cm, puberulent; ultimate lobes 5-19, width 2-8(-15) mm (basal), 0.5-3(-5) mm (cauline); margins of basal leaf, measured less than 1 cm from blade base, demarcating considerably more than 90° of arc when leaf laid flat; most cauline leaf blades exceeding internodes. |
blade light green, ± round, 1-5 × 1-6 cm, densely pubescent; ultimate lobes 7-20, width 2-5 mm (basal), 2-4 mm (cauline), apex gradually tapering to point; veins obscure. |
Inflorescences | 8-30(-40)-flowered, usually dense; pedicel 0.5-1.5 cm, puberulent; bracteoles 0-3 mm from flowers, green to blue, linear, 4-8 mm, puberulent. |
6-30(-60)-flowered, ± open, cylindric; pedicel ascending to spreading, 1-3(-4) cm, puberulent; bracteoles 1-3 mm from flowers, green, lanceolate, 3-6 mm, puberulent. |
Flowers | sepals dark blue to bluish purple, puberulent, lateral sepals ± erect, 8-12 × 3.5-5 mm, spurs straight, horizontal or nearly so, 9-15 mm; lower petal blades ± covering stamens, 4.5-6.5 mm, clefts 2-3 mm; hairs centered mostly near base of cleft, white. |
sepals bright blue, puberulent, lateral sepals spreading, 10-18 × 4-8 mm, spurs straight to slightly downcurved, ascending 0-30°, 11-16 mm; lower petal blades slightly elevated, ± exposing stamens, 4-8 mm, clefts 0.5-2 mm; hairs centered, densest on inner lobes near base of cleft, white to light yellow. |
Fruits | 7-13 mm, 3.5-4 times longer than wide, ± puberulent. |
11-15 mm, 3-3.5 times longer than wide, sparse puberulent. |
Seeds | seed coat cells with surfaces roughened. |
unwinged; seed coat cells with margins straight, surfaces ± roughened. |
2n | = 16. |
= 16. |
Delphinium distichum |
Delphinium geyeri |
|
Phenology | Flowering late spring–early summer. | Flowering late spring–early summer. |
Habitat | Wet meadows | Grasslands or Artemisia-Cercocarpus scrub |
Elevation | 100-2400 m (300-7900 ft) | 1400-3000 m (4600-9800 ft) |
Distribution |
ID; MT; OR; WA; WY; BC
|
CO; MT; NE; UT; WY
|
Discussion | Delphinium distichum hybridizes with D. multiplex and D. nuttallianum (D. ×diversicolor Rydberg). The name D. burkei has often been misapplied to D. distichum. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Apparently closely related to Delphinium stachydeum, D. geyeri is generally smaller, earlier flowering, with more finely dissected leaves and a more eastern geographic distribution. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Depauperata | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Wislizenana |
Sibling taxa | ||
Synonyms | D. strictum var. distichiflorum | |
Name authority | Geyer ex Hooker: J. Bot. 6: 68. (1847) | Greene: Erythea 2: 189. (1894) |
Web links |
|