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Delphinium oreganum

Willamette Valley larkspur

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

Stems

40-70 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 blue or bluish purple, spurs 10-13 mm;

lower petal blades 4.5-6.5 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. nuttallii

Delphinium barbeyi

Phenology Flowering late spring–early summer. Flowering summer.
Habitat Rock outcrops, rocky meadows Subalpine and alpine sites in wet soils
Elevation 20-300 m (100-1000 ft) 2500-4100 m (8200-13500 ft)
Distribution
from FNA
OR; WA
from FNA
AZ; CO; NM; UT; WY
[WildflowerSearch map]
[BONAP county map]
Discussion

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. exaltatum var. (e) barbeyi, D. occidentale var. barbeyi
Name authority unknown (Huth) Huth: Bull. Herb. Boissier 1: 335. (1893)
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