Delphinium nuttallii subsp. nuttallii(synonym of Delphinium oreganum) |
Delphinium umbraculorum |
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Willamette Valley larkspur |
umbrella larkspur |
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Stems | 40-70 cm. |
40-70(-90) cm; base often reddish, glabrous or puberulent. |
Leaves | blade round to pentagonal, 1.5-4 × 2-6 cm, nearly glabrous; ultimate lobes 3-13, width 3-20 mm (basal), 1-8 mm (cauline). |
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Inflorescences | (5-)10-25(-45)-flowered, open, narrowly pyramidal; pedicel 0.5-3(-7) cm, glabrous to puberulent; bracteoles 3-7 mm from flowers, green, linear, 3-6 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 dark blue, puberulent, lateral sepals spreading, 9-16 × 4-7 mm, spurs gently upcurved, ascending 30-45° above horizontal, 8-14 mm; lower petal blades elevated, exposing stamens, 3.5-6 mm, clefts 0.5-1.5 mm; hairs densest near junction of blade and claw above base of cleft, centered or on inner lobes, white. |
Fruits | 9-16(-19) mm, 2.5-3(-4) times longer than wide, puberulent. |
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Seeds | seed coat cells brick-shaped, cell margins straight, surfaces smooth. |
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2n | = 16. |
= 16. |
Delphinium nuttallii subsp. nuttallii |
Delphinium umbraculorum |
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Phenology | Flowering late spring–early summer. | Flowering late spring–early summer. |
Habitat | Rock outcrops, rocky meadows | Slopes in oak forests |
Elevation | 20-300 m (100-1000 ft) | 400-1600 m (1300-5200 ft) |
Distribution |
OR; WA |
CA
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Discussion | Delphinium umbraculorum is most often confused with D. patens subsp. hepaticoideum; refer to discussion of that taxon for distinguishing features. Hybrids occur with D. parryi and D. patens subsp. montanum. (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. Subscaposa |
Sibling taxa | ||
Name authority | unknown | H. F. Lewis & Epling: Brittonia 8: 19. (1954) |
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