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FNA | Family List | FNA Vol. 3 | Ranunculaceae | Delphinium

54b. Delphinium nuttallii subsp. ochroleucum (Nuttall) M. J. Warnock, Phytologia. 78: 98. 1995.

Light-yellow-flowered larkspur

Delphinium menziesii de Candolle var. (ß) ochroleucum Nuttall in J. Torrey & A. Gray, Fl. N. Amer. 1: 31. 1838; D. leucophaeum Greene

Stems 30-60 cm. Flowers: sepals white or light yellow, spurs 9-11 mm; lower petal blades 4-6 mm. 2 n = 16.

Flowering late spring. Rock outcrops, rocky meadows; of conservation concern; 50-100 m; Oreg.

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.


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