Delphinium nuttallii subsp. nuttallii(synonym of Delphinium oreganum) |
Delphinium distichum |
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Willamette Valley larkspur |
Burke's larkspur, meadow larkspur, strict larkspur, two-spike larkspur |
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Stems | 40-70 cm. |
(25-)30-60(-80) cm; base sometimes 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. |
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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. |
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Flowers | sepals blue or bluish purple, spurs 10-13 mm; lower petal blades 4.5-6.5 mm. |
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. |
Fruits | 7-13 mm, 3.5-4 times longer than wide, ± puberulent. |
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Seeds | seed coat cells with surfaces roughened. |
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2n | = 16. |
= 16. |
Delphinium nuttallii subsp. nuttallii |
Delphinium distichum |
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Phenology | Flowering late spring–early summer. | Flowering late spring–early summer. |
Habitat | Rock outcrops, rocky meadows | Wet meadows |
Elevation | 20-300 m (100-1000 ft) | 100-2400 m (300-7900 ft) |
Distribution |
OR; WA |
ID; MT; OR; WA; WY; BC
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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.) |
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Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Grumosa > Delphinium nuttallii | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Depauperata |
Sibling taxa | ||
Synonyms | D. strictum var. distichiflorum | |
Name authority | unknown | Geyer ex Hooker: J. Bot. 6: 68. (1847) |
Web links |
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