FNA: Delphinium basalticum vs. Delphinium wootonii

	Delphinium basalticum	Delphinium wootonii
	basalt larkspur, basaltic larkspur, Columbia Gorge larkspur	Organ Mountain larkspur, Wooton's larkspur
Stems	20-50(-65) cm; base often reddish, puberulent.	(15-)30-50(-60) cm; base sometimes reddish, pubescent.
Leaves	blade round, 2-6 × 5-9 cm, not succulent, nearly glabrous; ultimate lobes 5-19, width 3-15 mm (basal), 1-12 mm (cauline).	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).
Inflorescences	(2-)6-16(-26)-flowered; pedicel 2-7 cm, nearly glabrous; bracteoles 4-12 mm from flowers, green, linear, 3-7 mm, nearly glabrous.	15-30(-49)-flowered; pedicel 1-2(-3.6) cm, puberulent; bracteoles 1-5 mm from flowers, green, linear, 1-4(-12) mm, puberulent.
Flowers	sepals dark blue, nearly glabrous, lateral sepals spreading, 15-21 × 7-10 mm, spur straight to decurved, ascending 30-45° above horizontal, 14-18 mm; lower petal blades slightly elevated, ± exposing stamens, 7-9 mm, cleft 4-5 mm; hairs centered, mostly on inner lobes above base of cleft, yellow to white.	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.
Fruits	12-17 mm, 3.5-4 times longer than wide, glabrous.	(10-)11-20(-24) mm, 3-3.5 times longer than wide, glabrous.
Seeds	± wing-margined; seed coat cells with surfaces smooth.	seed coat cells with surfaces pustulate.
2n		= 16.

	Delphinium basalticum	Delphinium wootonii
Phenology	Flowering spring (-early summer).	Flowering spring.
Habitat	Basaltic cliff faces, n and e slopes at base of cliffs	Oak woods, grasslands, desert scrub
Elevation	200-500 m (700-1600 ft)	700-1800 m (2300-5900 ft)
Distribution	OR; WA [BONAP county map]	AZ; CO; NM; TX; Mexico (Sonora, Chihuahua, and Coahuila) [WildflowerSearch map] [BONAP county map]
Discussion	Of conservation concern. Hybrids between Delphinium basalticum and D. trolliifolium are known. (Discussion copyrighted by Flora of North America; reprinted with permission.)	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.)
Source	FNA vol. 3.	FNA vol. 3.
Parent taxa	Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Bicoloria	Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Virescens
Sibling taxa	D. alabamicum, D. alpestre, D. andersonii, D. andesicola, D. antoninum, D. bakeri, D. barbeyi, 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	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
Synonyms		D. virescens subsp. wootonii
Name authority	M. J. Warnock: Phytologia 78: 91. (1995)	Rydberg: Bull. Torrey Bot. Club 26: 587. (1900)
Web links	Local floras: OR, WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Delphinium basalticum

Delphinium wootonii

basalt larkspur, basaltic larkspur, Columbia Gorge larkspur

Organ Mountain larkspur, Wooton's larkspur

Stems

20-50(-65) cm;

base often reddish, puberulent.

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

base sometimes reddish, pubescent.

Leaves

blade round, 2-6 × 5-9 cm, not succulent, nearly glabrous; ultimate lobes 5-19, width 3-15 mm (basal), 1-12 mm (cauline).

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).

Inflorescences

(2-)6-16(-26)-flowered;

pedicel 2-7 cm, nearly glabrous;

bracteoles 4-12 mm from flowers, green, linear, 3-7 mm, nearly glabrous.

15-30(-49)-flowered;

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

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

Flowers

sepals dark blue, nearly glabrous, lateral sepals spreading, 15-21 × 7-10 mm, spur straight to decurved, ascending 30-45° above horizontal, 14-18 mm;

lower petal blades slightly elevated, ± exposing stamens, 7-9 mm, cleft 4-5 mm;

hairs centered, mostly on inner lobes above base of cleft, yellow to white.

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.

Fruits

12-17 mm, 3.5-4 times longer than wide, glabrous.

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

Seeds

± wing-margined;

seed coat cells with surfaces smooth.

seed coat cells with surfaces pustulate.

= 16.

Delphinium basalticum

Delphinium wootonii

Phenology

Flowering spring (-early summer).

Flowering spring.

Habitat

Basaltic cliff faces, n and e slopes at base of cliffs

Oak woods, grasslands, desert scrub

Elevation

200-500 m (700-1600 ft)

700-1800 m (2300-5900 ft)

Distribution

OR; WA

[BONAP county map]

AZ; CO; NM; TX; Mexico (Sonora, Chihuahua, and Coahuila)

[WildflowerSearch map]

[BONAP county map]

Discussion

Of conservation concern.

Hybrids between Delphinium basalticum and D. trolliifolium are known.

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

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.)

Source

FNA vol. 3.

Parent taxa

Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Bicoloria

Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Virescens

Sibling taxa

D. alabamicum, D. alpestre, D. andersonii, D. andesicola, D. antoninum, D. bakeri, D. barbeyi, 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

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

Synonyms

D. virescens subsp. wootonii

Name authority

M. J. Warnock: Phytologia 78: 91. (1995)

Rydberg: Bull. Torrey Bot. Club 26: 587. (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).

Choose a data source: Flora of North America, OregonFlora, UW Burke Herbarium

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Flora of North America species comparison

Delphinium basalticum

Delphinium wootonii

Delphinium basalticum

Delphinium wootonii