Flora of North America species comparison

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Delphinium wootonii

Delphinium geyeri

Organ Mountain larkspur, Wooton's larkspur

Geyer's larkspur, poisonweed
Stems

(15-)30-50(-60) cm;

base sometimes reddish, pubescent.

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

base usually reddish, puberulent.
Leaves

blade reniform to fan-shaped, 1.5-3 × 2.5-4 cm, puberulent; ultimate lobes 5-24, width 2-6 mm (basal), 1-3 mm (cauline).

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

15-30(-49)-flowered;

pedicel 1-2(-3.6) cm, puberulent;

bracteoles 1-5 mm from flowers, green, linear, 1-4(-12) mm, puberulent.

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 white to lavender, nearly glabrous, lateral sepals usually reflexed, (6-)8-13 × 3-7 mm, spur straight, ascending 30-80° above horizontal, (8-)13-20(-25) mm;

lower petal blades ± elevated, 6-9 mm, cleft 2.5-4.5 mm;

hairs centered, densest near base of cleft, white.

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

(10-)11-20(-24) mm, 3-3.5 times longer than wide, glabrous.

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

seed coat cells with surfaces pustulate.

unwinged;

seed coat cells with margins straight, surfaces ± roughened.
2n

= 16.

= 16.

Delphinium wootonii

Delphinium geyeri
Phenology Flowering spring. Flowering late spring–early summer.
Habitat Oak woods, grasslands, desert scrub Grasslands or Artemisia-Cercocarpus scrub
Elevation 700-1800 m (2300-5900 ft) 1400-3000 m (4600-9800 ft)
Distribution
from FNA
AZ; CO; NM; TX; Mexico (Sonora, Chihuahua, and Coahuila)
[WildflowerSearch map]
[BONAP county map]
from FNA
CO; MT; NE; UT; WY
[WildflowerSearch map]
[BONAP county map]
Discussion

Delphinium wootonii hybridizes with D. madrense in the eastern Big Bend area of Texas, and with D. carolinianum subsp. virescens.

(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. Virescens 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. viridescens, 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
Synonyms D. virescens subsp. wootonii
Name authority Rydberg: Bull. Torrey Bot. Club 26: 587. (1900) Greene: Erythea 2: 189. (1894)
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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