Flora of North America species comparison

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Delphinium nuttallii subsp. nuttallii

(synonym of Delphinium oreganum)

Delphinium glaucescens
Delphinium oreganum

Willamette Valley larkspur

glaucous larkspur, glaucus larkspur, smooth larkspur
Stems

40-70 cm.

35-70(-100) cm;

base ± reddish, glabrous, glaucous.
Leaves

blade pentagonal to round, 2-9 × 3-14 cm, margins seldom laciniate, nearly glabrous; ultimate lobes 5-17, width 2-8 mm, tips abruptly tapered to mucronate apex;

midcauline leaf lobes more than 3 times longer than wide.
Inflorescences

10-25-flowered;

pedicel 0.5-1.5 cm, puberulent to glabrous;

bracteoles 2-20 mm from flowers, green, linear, 3-8 mm, nearly glabrous.
Flowers

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

lower petal blades 4.5-6.5 mm.

sepals dark blue, nearly glabrous, lateral sepals spreading to reflexed, 8-12 × 3-4 mm, spurs straight, ascending 40-90°, 9-13 mm;

lower petal blades ± covering stamens, 3-5 mm, clefts 1-2 mm;

hairs centered, mostly near base of cleft, white.
Fruits

7-13 mm, 3.4-4 times longer than wide, puberulent.
Seeds

± wing-margined;

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

= 16.

Delphinium nuttallii subsp. nuttallii

Delphinium glaucescens
Phenology Flowering late spring–early summer. Flowering summer.
Habitat Rock outcrops, rocky meadows Rocky slopes in subalpine coniferous woods
Elevation 20-300 m (100-1000 ft) 2000-4000 m (6600-13100 ft)
Distribution
from FNA
OR; WA
from FNA
ID; MT; WY
[WildflowerSearch map]
[BONAP county map]
Discussion

Hybrids with Delphinium glaucum are known.

(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. barbeyi, 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. 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
Name authority unknown Rydberg: Mem. New York Bot. Gard. 1: 155. (1900)
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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