Flora of North America species comparison

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Clarkia williamsonii

Fort miller clarkia, Fort miller clarkia or fairyfan
Stems

erect, to 100 cm, puberulent.
Leaves

petiole 0–10 mm;

blade linear to narrowly lanceolate, 2–7 cm.
Inflorescences

open racemes, axis straight;

buds erect, mucronate.
Flowers

floral tube 7–13 mm;

sepals reflexed individually or in pairs, tips distinct in bud;

corolla bowl-shaped, petals usually lavender, white near middle with purple spot distally, rarely uniformly wine-red, 10–30 mm;

stamens 8, subequal;

ovary 8-grooved, shorter than adjacent internode;

stigma usually exserted beyond anthers.
Capsules

10–30 mm.
Seeds

brown or gray, 1–1.5 mm, scaly, crest 0.1 mm.
2n

= 18.

Clarkia williamsonii
Phenology Flowering Apr–Sep.
Habitat Foothill woodlands, yellow-pine forests.
Elevation 400–2000 m. (1300–6600 ft.)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Clarkia williamsonii occurs widely along the western slope of the Sierra Nevada from Nevada to Kern counties, and the Tehachapi Mountains barely to Los Angeles and Santa Barbara counties (one collection each). There are unverified reports from Riverside and Shasta counties.

Clarkia williamsonii is similar to C. speciosa and some populations of the hexaploid C. purpurea but can be distinguished from the former by petal color pattern and from both by having sepals that have distinctly free tips in bud, a trait most obvious in pressed specimens when the tips tend to spread apart.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Clarkia > sect. Godetia
Sibling taxa
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. xantiana
Synonyms Godetia williamsonii
Name authority (Durand & Hilgard) H. Lewis & M. E. Lewis: Madroño 12: 34. (1953)
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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