Flora of North America species comparison

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Delphinium nuttallii subsp. ochroleucum

(synonym of Delphinium leucophaeum)

Delphinium barbeyi
Delphinium leucophaeum

pale larkspur, white rock larkspur

Barbey larkspur, Barbey's larkspur, subalpine larkspur, tall larkspur
Stems

30-60 cm.

50-150 cm;

base green, glabrous.
Leaves

blade round to reniform, 4-8 × 7-15 cm, glabrous; ultimate lobes 5-9, width 8-50 mm.
Inflorescences

10-50-flowered;

pedicel 0.5-6 cm, glandular-puberulent;

bracteoles 1-4(-8) mm from flowers, blue to green, awl-shaped, 5-14 mm, puberulent.
Flowers

sepals white or light yellow, spurs 9-11 mm;

lower petal blades 4-6 mm.

sepals dark bluish purple, sparsely puberulent, lateral sepals forward pointing, 13-23 × 5-8 mm, spurs ascending ca. 45°, downcurved apically, 10-18 mm;

lower petal blades ± covering stamens, 4-7 mm, clefts 2-3 mm;

hairs centered, mostly near base of cleft, sparse elsewhere, white or yellow.
Fruits

17-22 mm, 2.5-3 times longer than wide, puberulent.
Seeds

wing-margined;

seed coat cells narrow but short, surfaces pustulate.
2n

= 16.

= 16.

Delphinium nuttallii subsp. ochroleucum

Delphinium barbeyi
Phenology Flowering late spring. Flowering summer.
Habitat Rock outcrops, rocky meadows Subalpine and alpine sites in wet soils
Elevation 50-100 m (200-300 ft) 2500-4100 m (8200-13500 ft)
Distribution
from FNA
OR
[WildflowerSearch map]
from FNA
AZ; CO; NM; UT; WY
[WildflowerSearch map]
[BONAP county 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.)

Delphinium barbeyi hybridizes extensively with D. glaucum in western Colorado and eastern Utah, where plants appearing to be hybrid [D. ×occidentale (S. Watson) S. Watson] are often far more common than plants of either putative parent. Several other names have been used for these plants, including D. elatum var. occidentale S. Watson, D. abietorum Tidestrom, and D. scopulorum subsp. occidentale (S. Watson) Abrams. Delphinium barbeyi is also known to hybridize with D. ramosum and D. sapellonis.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
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
D. nuttallii subsp. nuttallii, D. nuttallii subsp. ochroleucum
D. alabamicum, D. alpestre, D. andersonii, D. andesicola, D. antoninum, D. bakeri, D. basalticum, D. bicolor, D. brachycentrum, D. californicum, D. cardinale, D. carolinianum, D. decorum, D. depauperatum, D. distichum, D. elatum, D. exaltatum, D. geraniifolium, D. geyeri, D. glareosum, D. glaucescens, D. glaucum, D. gracilentum, D. gypsophilum, D. hansenii, D. hesperium, D. hutchinsoniae, D. inopinum, D. lineapetalum, D. luteum, D. madrense, D. menziesii, D. multiplex, D. newtonianum, D. novomexicanum, D. nudicaule, D. nuttallianum, D. nuttallii, D. parishii, D. parryi, D. patens, D. polycladon, D. purpusii, D. ramosum, D. recurvatum, D. robustum, D. sapellonis, D. scaposum, D. scopulorum, D. stachydeum, D. sutherlandii, D. treleasei, D. tricorne, D. trolliifolium, D. uliginosum, D. umbraculorum, D. variegatum, D. viridescens, D. wootonii, D. xantholeucum
Synonyms D. menziesii var. (ß) ochroleucum, D. leucophaeum D. exaltatum var. (e) barbeyi, D. occidentale var. barbeyi
Name authority (Nuttall) M. J. Warnock: Phytologia 78: 98. (1995) (Huth) Huth: Bull. Herb. Boissier 1: 335. (1893)
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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