Flora of North America species comparison

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Clarkia stellata

Clarkia arcuata

Lake Almanor clarkia, lake amador clarkia

glandular clarkia, glandular clarkia or fairyfan, glandular fairyfan
Stems

erect, to 100 cm, puberulent.

erect, to 8 cm, glabrous or puberulent.
Leaves

petiole 5–30 mm;

blade lanceolate to elliptic or ovate, 1–5 cm.

sessile;

blade linear to narrowly lanceolate or oblanceolate, 1.5–6cm, surfaces glabrate.
Inflorescences

open racemes, axis in bud recurved 1–3 nodes distal to open flowers;

buds pendent, narrowly obovoid, tip acute.

racemes, axis recurved at tip in bud;

buds pendent.
Flowers

floral tube 1.5–2 mm;

sepals reflexed individually;

corolla rotate, petals lavender-purple, not dark-flecked or spotted, obovate, 6–8 × 3–5 mm, inconspicuously 3-lobed;

stamens 8, subequal, subtended by ciliate scales, pollen yellow;

ovary shallowly 4-grooved, puberulent;

stigma not exserted beyond anthers.

floral tube 3–7 mm, puberulent with spreading hairs and shorter glandular hairs;

corolla bowl-shaped, petals pinkish lavender, lighter proximally, often with dark reddish spot at base, broadly obovate or obdeltate, 10–30 mm;

stamens 8, subequal;

ovary 8-grooved, sparsely puberulent, hairs mostly glandular;

stigma exserted beyond anthers.
Capsules

20–25 mm;

pedicel 1–3 mm.

10–35 mm;

pedicel 5–15 mm.
Seeds

unknown.

brown, 2 mm, minutely scaly, crest 0.5 mm, prominent.
2n

= 14.

= 14.

Clarkia stellata

Clarkia arcuata
Phenology Flowering Jun–Jul. Flowering Apr–Jun.
Habitat Open coniferous forests. Openings in woodlands and chaparral, serpentine soil.
Elevation 1000–1500 m. (3300–4900 ft.) 0–1600 m. (0–5200 ft.)
Distribution
from FNA
CA
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Clarkia stellata is known from the southern Cascade–northern Sierra Nevada region, including Lassen, Nevada, Plumas, Shasta, Sierra, and Tehama counties (with unverified reports from Butte and Modoc counties).

Clarkia stellata is probably a self-pollinating derivative of C. mildrediae subsp. lutescens, to judge from pollen color. The two species are readily distinguishedby the much smaller flowers of C. stellata and the position of the stigma. Hybrids have low fertility due to chromosomal rearrangement. Clarkia stellata is morphologically very similar to the self-pollinating tetraploid C. rhomboidea but can be distinguished from it by yellow pollen and shallowly lobed, unspotted petals.

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

Clarkia arcuata is primarily distributed in the foothills of the Sierra Nevada from Mariposa to Tehama counties, sparsely south to Kern County, and with one disjunct occurrence in Shasta County; it has also been reported from Napa County.

Clarkia arcuata is morphologically most similar to C. lassenensis, from which it differs in fruit characteristics. The two species have distinct areas of distribution and attempts to produce hybrids have not been successful.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10. FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Clarkia > sect. Myxocarpa Onagraceae > subfam. Onagroideae > tribe Onagreae > Clarkia > sect. Rhodanthos > subsect. Flexicaules
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. tembloriensis, C. unguiculata, C. virgata, C. williamsonii, C. xantiana
C. affinis, C. amoena, 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, C. xantiana
Synonyms Oenothera arcuata, Godetia hispidula, O. hispidula
Name authority Mosquin: Leafl. W. Bot. 9: 215. (1962) (Kellogg) A. Nelson & J. F. Macbride: Bot. Gaz. 65: 62. (1918)
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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