Delphinium nuttallii subsp. nuttallii(synonym of Delphinium oreganum) |
Delphinium exaltatum |
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Willamette Valley larkspur |
tall larkspur |
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Stems | 40-70 cm. |
70-200 cm; base reddish, nearly glabrous. |
Leaves | blade pentagonal, 2-7 × 3-9 cm, puberulent; ultimate lobes 3-7, width 5-25 mm; midcauline leaf lobes less than 3 times longer than wide. |
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Inflorescences | 8-30-flowered; pedicel 0.5-2 cm, puberulent; bracteoles 2-4 mm from flowers, green, linear, 2-4 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 whitish to pale lavender or purple, puberulent, lateral sepals forward pointing, 9-11 × 4-6 mm, spurs straight, as much as 45° above or below horizontal, 9-12 mm; lower petal blades ± covering stamens, 3-5 mm, clefts 1-2 mm; hairs centered, mostly near base of cleft, white. |
Fruits | 7-12 mm, 2-2.5 times longer than wide, ± puberulent. |
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Seeds | ± wing-margined; seed coat cells elongate, surfaces smooth. |
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2n | = 16. |
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Delphinium nuttallii subsp. nuttallii |
Delphinium exaltatum |
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Phenology | Flowering late spring–early summer. | Flowering summer. |
Habitat | Rock outcrops, rocky meadows | Rocky slopes in open deciduous woods and barrens, mainly on calcareous substrates, also shale and mafic and ultramafic rocks |
Elevation | 20-300 m (100-1000 ft) | 150-2000 m (500-6600 ft) |
Distribution |
OR; WA |
AL; KY; MD; MO; NC; OH; PA; TN; VA; WV
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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. Exaltata |
Sibling taxa | ||
Name authority | unknown | Aiton: Hort. Kew. 2: 244. (1789) |
Web links |