Flora of North America species comparison

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Delphinium nuttallii subsp. ochroleucum

(synonym of Delphinium leucophaeum)

Delphinium sect. Diedropetala
Delphinium leucophaeum

pale larkspur, white rock larkspur
Roots

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

buds often less than 3 mm.
Stems

30-60 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 white or light yellow, spurs 9-11 mm;

lower petal blades 4-6 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. ochroleucum

Delphinium sect. Diedropetala
Phenology Flowering late spring.
Habitat Rock outcrops, rocky meadows
Elevation 50-100 m (200-300 ft)
Distribution
from FNA
OR
[WildflowerSearch map]
Discussion

Of conservation concern.

The range of morphologic features of Delphinium nuttallii subsp. ochroleucum (D. leucophaeum) is almost completely encompassed within that of D. nuttallii subsp. nuttallii. Sepal color is the only feature consistently separating the two subspecies. Were it not for the fact that any given population typically has plants of only one flower color, a rank of forma would be more appropriate.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
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
Synonyms D. menziesii var. (ß) ochroleucum, D. leucophaeum
Name authority (Nuttall) M. J. Warnock: Phytologia 78: 98. (1995) Huth: Bot. Jahrb. Syst. 20: 420. (1895)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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