FNA: Delphinium xantholeucum vs. Delphinium lineapetalum

	Delphinium xantholeucum	Delphinium lineapetalum
	yellow-white larkspur	thinpetal larkspur
Stems	40-60(-100) cm; base often reddish, glabrous, ± glaucous.	(15-)30-60 cm; base usually reddish, glabrous to glaucous.
Leaves	blade round, 2-6 × 4-10 cm, nearly glabrous; ultimate lobes 3-15, width 3-8 mm (basal), 1-5 mm (cauline).	blade round, 1-5 × 2-6 cm, glabrous; ultimate lobes 5-16, width 1-4 mm (basal), 0.5-3 mm (cauline).
Inflorescences	10-20(-60)-flowered, narrowly pyramidal; pedicel spreading, yellowish, 1.5-3 cm, ± glandular-puberulent; bracteoles 6-12 mm from flowers, green to light brown, linear to lanceolate, 4-7 mm, nearly glabrous.	(3-)9-24(-40)-flowered, pyramidal; pedicel spreading, 1-2.5 cm, glabrous or glandular-puberulent; bracteoles 4-7 mm from flowers, blue or green, linear, 1-3 mm, glabrous or glandular-puberulent.
Flowers	sepals yellow, glabrous, lateral sepals reflexed, 9-12 × 3-5 mm, spurs straight, ascending ca. 45° above horizontal, 11-15 mm; lower petal blades elevated, exposing stamens, 3-5 mm, clefts 1-2 mm; hairs centered mostly on inner lobes near base of cleft, white.	sepals light blue to lavender, nearly glabrous, lateral sepals reflexed, 10-13 × 3-5 mm, spurs straight to slightly decurved, nearly horizontal to ascending ca. 30°, 11-17 mm; lower petal blades elevated, exposing stamens, 3-5 mm, clefts 0.5-2 mm; hairs centered mostly on inner lobes near base of cleft, white.
Fruits	15-22 mm, 3-4 times longer than wide, glabrous to glandular-puberulent.	13-21 mm, 4-4.5 times longer than wide, puberulent to glabrous.
Seeds	seed coat cells narrow, short, cell margins straight, surfaces smooth.	seed coat cells narrow, short, cell margins straight, surfaces smooth.
2n	= 16.

	Delphinium xantholeucum	Delphinium lineapetalum
Phenology	Flowering spring.	Flowering spring.
Habitat	Slopes in open yellow pine forests, grasslands, sage scrub	Open pine woods, dry meadows
Elevation	150-600 m (500-2000 ft)	400-1800 m (1300-5900 ft)
Distribution	WA [WildflowerSearch map] [BONAP county map]	WA [WildflowerSearch map] [BONAP county map]
Discussion	Of conservation concern. Delphinium xantholeucum is very local; much of the habitat of this species has been converted to orchards. (Discussion copyrighted by Flora of North America; reprinted with permission.)	Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 3.	FNA vol. 3.
Parent taxa	Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Subscaposa	Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Subscaposa
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. wootonii	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. 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. nuttallianum var. lineapetalum
Name authority	Piper: Contr. U.S. Natl. Herb. 11: 280. (1906)	Ewan: Univ. Colorado Stud., Ser. D, Phys. Sci. 2: 126. (1945)
Web links	Local floras: 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	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

Delphinium xantholeucum

Delphinium lineapetalum

yellow-white larkspur

thinpetal larkspur

Stems

40-60(-100) cm;

base often reddish, glabrous, ± glaucous.

(15-)30-60 cm;

base usually reddish, glabrous to glaucous.

Leaves

blade round, 2-6 × 4-10 cm, nearly glabrous; ultimate lobes 3-15, width 3-8 mm (basal), 1-5 mm (cauline).

blade round, 1-5 × 2-6 cm, glabrous; ultimate lobes 5-16, width 1-4 mm (basal), 0.5-3 mm (cauline).

Inflorescences

10-20(-60)-flowered, narrowly pyramidal;

pedicel spreading, yellowish, 1.5-3 cm, ± glandular-puberulent;

bracteoles 6-12 mm from flowers, green to light brown, linear to lanceolate, 4-7 mm, nearly glabrous.

(3-)9-24(-40)-flowered, pyramidal;

pedicel spreading, 1-2.5 cm, glabrous or glandular-puberulent;

bracteoles 4-7 mm from flowers, blue or green, linear, 1-3 mm, glabrous or glandular-puberulent.

Flowers

sepals yellow, glabrous, lateral sepals reflexed, 9-12 × 3-5 mm, spurs straight, ascending ca. 45° above horizontal, 11-15 mm;

lower petal blades elevated, exposing stamens, 3-5 mm, clefts 1-2 mm;

hairs centered mostly on inner lobes near base of cleft, white.

sepals light blue to lavender, nearly glabrous, lateral sepals reflexed, 10-13 × 3-5 mm, spurs straight to slightly decurved, nearly horizontal to ascending ca. 30°, 11-17 mm;

lower petal blades elevated, exposing stamens, 3-5 mm, clefts 0.5-2 mm;

hairs centered mostly on inner lobes near base of cleft, white.

Fruits

15-22 mm, 3-4 times longer than wide, glabrous to glandular-puberulent.

13-21 mm, 4-4.5 times longer than wide, puberulent to glabrous.

Seeds

seed coat cells narrow, short, cell margins straight, surfaces smooth.

= 16.

Delphinium xantholeucum

Delphinium lineapetalum

Phenology

Flowering spring.

Habitat

Slopes in open yellow pine forests, grasslands, sage scrub

Open pine woods, dry meadows

Elevation

150-600 m (500-2000 ft)

400-1800 m (1300-5900 ft)

Distribution

[WildflowerSearch map]

[BONAP county map]

[WildflowerSearch map]

[BONAP county map]

Discussion

Of conservation concern.

Delphinium xantholeucum is very local; much of the habitat of this species has been converted to orchards.

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

Of conservation concern.

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

Source

FNA vol. 3.

Parent taxa

Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Subscaposa

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. wootonii

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. 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. nuttallianum var. lineapetalum

Name authority

Piper: Contr. U.S. Natl. Herb. 11: 280. (1906)

Ewan: Univ. Colorado Stud., Ser. D, Phys. Sci. 2: 126. (1945)

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 xantholeucum

Delphinium lineapetalum

Delphinium xantholeucum

Delphinium lineapetalum