Delphinium nuttallii subsp. nuttallii(synonym of Delphinium oreganum) |
Delphinium nuttallii |
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Willamette Valley larkspur |
Nuttall's larkspur, upland larkspur |
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Stems | 40-70 cm. |
20-60(-90) cm; base usually reddish, pubescent. |
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Leaves | blade round to reniform, 2-8 × 3-14 cm, pubescent; ultimate lobes 5-18, width 4-7 mm (basal), 1-5 mm (cauline), widest at middle or in proximal 1/2. |
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Inflorescences | 5-25(-40)-flowered, at least 2 times longer than wide; pedicel 1.5-4(-9) cm, puberulent; bracteoles 2-3 mm from flowers, green, linear, 4-6 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 bluish purple to yellowish, (± drab), often partly fading upon drying, puberulent, lateral sepals ± spreading, 8-11 × 3-6 mm, spurs straight, slightly ascending, 9-13 mm; lower petal blades ± covering stamens, 4-6 mm, clefts 0.5-2 mm; hairs well dispersed, mostly near margins and base of cleft, white to yellow or blue. |
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Fruits | 10-14(-18) mm, 3.5-4 times longer than wide, pubescent. |
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Seeds | wing-margined; seed coat cell surfaces smooth. |
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2n | = 16. |
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Delphinium nuttallii subsp. nuttallii |
Delphinium nuttallii |
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Phenology | Flowering late spring–early summer. | |||||
Habitat | Rock outcrops, rocky meadows | |||||
Elevation | 20-300 m (100-1000 ft) | |||||
Distribution |
OR; WA |
OR; WA
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Discussion | Subspecies 2 (2 in the flora). Delphinium nuttallii has often been confused with D. menziesii; it may be distinguished by consistently smaller flowers and usually more flowers per plant than in the latter. Interestingly, each species produces both blue-purple and yellowish flower colors, in separate populations. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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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. Grumosa | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | unknown | A. Gray: Bot. Gaz. 12: 54. (1887) | ||||
Web links |