Delphinium nuttallii subsp. nuttallii(synonym of Delphinium oreganum) |
Delphinium xantholeucum |
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Willamette Valley larkspur |
yellow-white larkspur |
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Stems | 40-70 cm. |
40-60(-100) cm; base often reddish, glabrous, ± glaucous. |
Leaves | blade round, 2-6 × 4-10 cm, nearly glabrous; ultimate lobes 3-15, width 3-8 mm (basal), 1-5 mm (cauline). |
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Inflorescences | 10-20(-60)-flowered, narrowly pyramidal; pedicel spreading, yellowish, 1.5-3 cm, ± glandular-puberulent; bracteoles 6-12 mm from flowers, green to light brown, linear to lanceolate, 4-7 mm, nearly glabrous. |
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Flowers | sepals blue or bluish purple, spurs 10-13 mm; lower petal blades 4.5-6.5 mm. |
sepals yellow, glabrous, lateral sepals reflexed, 9-12 × 3-5 mm, spurs straight, ascending ca. 45° above horizontal, 11-15 mm; lower petal blades elevated, exposing stamens, 3-5 mm, clefts 1-2 mm; hairs centered mostly on inner lobes near base of cleft, white. |
Fruits | 15-22 mm, 3-4 times longer than wide, glabrous to glandular-puberulent. |
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Seeds | seed coat cells narrow, short, cell margins straight, surfaces smooth. |
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2n | = 16. |
= 16. |
Delphinium nuttallii subsp. nuttallii |
Delphinium xantholeucum |
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Phenology | Flowering late spring–early summer. | Flowering spring. |
Habitat | Rock outcrops, rocky meadows | Slopes in open yellow pine forests, grasslands, sage scrub |
Elevation | 20-300 m (100-1000 ft) | 150-600 m (500-2000 ft) |
Distribution |
OR; WA |
WA
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Discussion | Of conservation concern. Delphinium xantholeucum is very local; much of the habitat of this species has been converted to orchards. (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 | Piper: Contr. U.S. Natl. Herb. 11: 280. (1906) |
Web links |