Clarkia rostrata
Clarkia xantiana
beak clarkia
gunsight clarkia, Xantus' clarkia
erect, to 60 cm, puberulent.
erect, to 80 cm, glabrous, glaucous.
petiole to 10 mm;
blade lanceolate, 1–6 cm.
petiole 0–2 mm;
blade linear to lanceolate, 2–6 cm.
open racemes, axis recurved at tip in bud;
buds pendent.
open racemes, axis straight;
buds pendent.
floral tube 1.5–2.5 mm, with ring of hairs at distal margin inside;
sepals reflexed together to 1 side;
corolla bowl-shaped, petals pinkish lavender shading white near middle, often flecked reddish purple, base reddish purple, 10–25 mm;
stamens 8, unequal, width of all filaments equal or inner slightly thinner, outer anthers lavender, inner smaller, paler.
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.
10–30 mm, beak 7–15 mm.
15–25 mm;
pedicel 0–5 mm.
unknown.
brown, 1.3–1.5 mm, tuberculate, crest minute.
= 18.
Clarkia rostrata
Clarkia xantiana
Clarkia rostrata is known only from the Merced River drainage in the central Sierra Nevada Foothills, including Mariposa, Merced, Stanislaus, and (barely) Tuolumne counties. Because of its very limited distribution, C. rostrata is listed as rare by the California Native Plant Society.
Clarkia rostrata is closely related to C. cylindrica and C. lewisii but can be distinguished readily from both by the conspicuous beak of the capsule.
(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.)
1. Petals 12–20 mm; stigmas exserted beyond anthers. | subsp. xantiana |
1. Petals 6–12 mm; stigmas not exserted beyond anthers. | subsp. parviflora |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
