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Delphinium oreganum

Willamette Valley larkspur

Roots

2-80 cm, tuberlike or fibrous, dry or fleshy;

buds often less than 3 mm.

Stems

40-70 cm.

1-8(-19) per root;

base firmly attached to root or not.

Leaves

cauline and/or in basal rosette, gradually or abruptly reduced into bracts.

Flowers

sepals blue or bluish purple, spurs 10-13 mm;

lower petal blades 4.5-6.5 mm.

sepals blue, purple, white, red, or yellow;

lower petal blades often same color as lateral sepals, usually greater than 1/5 length of lateral sepals (exceptions in red- and yellow-flowered species).

2n

= 16.

Delphinium nuttallii subsp. nuttallii

Delphinium sect. Diedropetala

Phenology Flowering late spring–early summer.
Habitat Rock outcrops, rocky meadows
Elevation 20-300 m (100-1000 ft)
Distribution
from FNA
OR; WA
Source FNA vol. 3. FNA vol. 3, p. 197.
Parent taxa Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Grumosa > Delphinium nuttallii Ranunculaceae > Delphinium
Sibling taxa
D. nuttallii subsp. nuttallii, D. nuttallii subsp. ochroleucum
Subordinate taxa
Name authority unknown Huth: Bot. Jahrb. Syst. 20: 420. (1895)
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