Delphinium distichum |
Delphinium lineapetalum |
|
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Burke's larkspur, meadow larkspur, strict larkspur, two-spike larkspur |
thinpetal larkspur |
|
Stems | (25-)30-60(-80) cm; base sometimes reddish, puberulent. |
(15-)30-60 cm; base usually reddish, glabrous to glaucous. |
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 round, 1-5 × 2-6 cm, glabrous; ultimate lobes 5-16, width 1-4 mm (basal), 0.5-3 mm (cauline). |
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. |
(3-)9-24(-40)-flowered, pyramidal; pedicel spreading, 1-2.5 cm, glabrous or glandular-puberulent; bracteoles 4-7 mm from flowers, blue or green, linear, 1-3 mm, glabrous or glandular-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 light blue to lavender, nearly glabrous, lateral sepals reflexed, 10-13 × 3-5 mm, spurs straight to slightly decurved, nearly horizontal to ascending ca. 30°, 11-17 mm; lower petal blades elevated, exposing stamens, 3-5 mm, clefts 0.5-2 mm; hairs centered mostly on inner lobes near base of cleft, white. |
Fruits | 7-13 mm, 3.5-4 times longer than wide, ± puberulent. |
13-21 mm, 4-4.5 times longer than wide, puberulent to glabrous. |
Seeds | seed coat cells with surfaces roughened. |
seed coat cells narrow, short, cell margins straight, surfaces smooth. |
2n | = 16. |
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Delphinium distichum |
Delphinium lineapetalum |
|
Phenology | Flowering late spring–early summer. | Flowering spring. |
Habitat | Wet meadows | Open pine woods, dry meadows |
Elevation | 100-2400 m (300-7900 ft) | 400-1800 m (1300-5900 ft) |
Distribution |
ID; MT; OR; WA; WY; BC
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WA
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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.) |
Of conservation concern. (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. Subscaposa |
Sibling taxa | ||
Synonyms | D. strictum var. distichiflorum | D. nuttallianum var. lineapetalum |
Name authority | Geyer ex Hooker: J. Bot. 6: 68. (1847) | Ewan: Univ. Colorado Stud., Ser. D, Phys. Sci. 2: 126. (1945) |
Web links |
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