Flora of North America species comparison

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Clarkia xantiana subsp. xantiana

Clarkia xantiana
Photo is of parent taxon

gunsight clarkia, Xantus' clarkia

gunsight clarkia, Xantus' clarkia
Stems

erect, to 80 cm, glabrous, glaucous.
Leaves

petiole 0–2 mm;

blade linear to lanceolate, 2–6 cm.
Inflorescences

open racemes, axis straight;

buds pendent.
Flowers

petals lavender to reddish purple, 12–20 mm;

stigma exserted beyond anthers.

floral tube 2–5 mm;

sepals reflexed together to 1 side;

corolla rotate, petals lavender to reddish purple, lavender-pink, or white, often with white-surrounded dark reddish purple spot distally, clawed, 2-lobed, with slender central tooth, 1–3 mm, 6–20 mm;

stamens 8, in 2 unequal sets, outer anthers lavender to purple, inner smaller, paler;

ovary 8-grooved;

stigma exserted or not beyond anthers.
Capsules

15–25 mm;

pedicel 0–5 mm.
Seeds

brown, 1.3–1.5 mm, tuberculate, crest minute.
2n

= 18.

Clarkia xantiana subsp. xantiana

Clarkia xantiana
Phenology Flowering May–Jun.
Habitat Dry slopes, woodlands, forest mar­gins.
Elevation 500–2000 m. (1600–6600 ft.)
Distribution
from FNA
CA
[BONAP county map]
from USDA
California
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies xantiana is known from the southern Sierra Nevada (especially Kern River drainage) and Tehachapi Mountain area in Kern and Tulare counties, and the Western Transverse Ranges in Los Angeles County.

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

Subspecies 2 (2 in the flora).

Originally placed in the group now delimited as subsect. Phaeostoma by H. Lewis and M. E. Lewis (1955), Clarkia xantiana was treated as a monotypic subsect. Xantianae within sect. Phaeostoma by K. E. Holsinger (1985), based mainly on its unusual 2-lobed petals with a tooth in the sinus. Molecular data (R. A. Levin et al. 2004) placed C. xantiana close to C. bottae, and both of them close to but not within sect. Phaeostoma. Both species share the chromosome number 2n = 18 with C. jolonensis.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Petals 12–20 mm; stigmas exserted beyond anthers.
subsp. xantiana
1. Petals 6–12 mm; stigmas not exserted beyond anthers.
subsp. parviflora
Source FNA vol. 10. FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Clarkia > sect. Fibula > Clarkia xantiana Onagraceae > subfam. Onagroideae > tribe Onagreae > Clarkia > sect. Fibula
Sibling taxa
C. xantiana subsp. parviflora
C. affinis, C. amoena, C. arcuata, C. australis, C. biloba, C. borealis, C. bottae, C. breweri, C. concinna, C. cylindrica, C. davyi, C. delicata, C. dudleyana, C. epilobioides, C. exilis, C. franciscana, C. gracilis, C. heterandra, C. imbricata, C. jolonensis, C. lassenensis, C. lewisii, C. lingulata, C. mildrediae, C. modesta, C. mosquinii, C. prostrata, C. pulchella, C. purpurea, C. rhomboidea, C. rostrata, C. rubicunda, C. similis, C. speciosa, C. springvillensis, C. stellata, C. tembloriensis, C. unguiculata, C. virgata, C. williamsonii
Subordinate taxa
C. xantiana subsp. parviflora, C. xantiana subsp. xantiana
Name authority unknown A. Gray: Proc. Boston Soc. Nat. Hist. 7: 146. (1859)
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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