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Delphinium viridescens

Wenatchee larkspur

Geyer's larkspur, poisonweed

Stems

90-150 cm;

base usually green, glabrous.

(15-)30-60(-80) cm;

base usually reddish, puberulent.

Leaves

blade cuneate to semicircular, 2-5 × 3-12 cm, nearly glabrous; ultimate lobes 3-21, width 1-8 mm.

blade light green, ± round, 1-5 × 1-6 cm, densely pubescent; ultimate lobes 7-20, width 2-5 mm (basal), 2-4 mm (cauline), apex gradually tapering to point;

veins obscure.

Inflorescences

25-80-flowered, dense;

pedicel 0.5-2 cm, glandular-pubescent;

bracteoles 1-4 mm from flowers, green, lanceolate, 3.5-6 mm, glandular-pubescent.

6-30(-60)-flowered, ± open, cylindric;

pedicel ascending to spreading, 1-3(-4) cm, puberulent;

bracteoles 1-3 mm from flowers, green, lanceolate, 3-6 mm, puberulent.

Flowers

sepals yellowish green, nearly glabrous, lateral sepals forward pointing, 7-9 × 3-4 mm, spurs decurved, 30-45° below horizontal, often hooked apically, 8-11 mm;

lower petal blades ± covering stamens, 4-6 mm, clefts 0.5-1.5 mm;

hairs centered, mostly near junction of blade and claw, yellow.

sepals bright blue, puberulent, lateral sepals spreading, 10-18 × 4-8 mm, spurs straight to slightly downcurved, ascending 0-30°, 11-16 mm;

lower petal blades slightly elevated, ± exposing stamens, 4-8 mm, clefts 0.5-2 mm;

hairs centered, densest on inner lobes near base of cleft, white to light yellow.

Fruits

8-11 mm, 2.5-3 times longer than wide, puberulent.

11-15 mm, 3-3.5 times longer than wide, sparse puberulent.

Seeds

± wing-margined;

seed coat cells with surfaces ± roughened.

unwinged;

seed coat cells with margins straight, surfaces ± roughened.

2n

= 16.

Delphinium viridescens

Delphinium geyeri

Phenology Flowering summer. Flowering late spring–early summer.
Habitat Wet meadows and streamsides in coniferous forest, heavy clay soils Grasslands or Artemisia-Cercocarpus scrub
Elevation 500-1000 m [1600-3300 ft] 1400-3000 m [4600-9800 ft]
Distribution
from FNA
WA
[WildflowerSearch map]
[BONAP county map]
from FNA
CO; MT; NE; UT; WY
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Delphinium viridescens is local in mountains southwest of Wenatchee, Washington.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Apparently closely related to Delphinium stachydeum, D. geyeri is generally smaller, earlier flowering, with more finely dissected leaves and a more eastern geographic distribution.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 3. FNA vol. 3.
Parent taxa Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Multiplex Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Wislizenana
Sibling taxa
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. 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. wootonii, D. xantholeucum
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. 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
Name authority Leiberg: Proc. Biol. Soc. Wash. 11: 39. (1897) Greene: Erythea 2: 189. (1894)
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