Flora of North America species comparison

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Clarkia rostrata

Clarkia epilobioides

beak clarkia

canyon clarkia, willow-herb clarkia
Stems

erect, to 60 cm, puberulent.

erect, 20–70 cm, sparsely puberulent.
Leaves

petiole to 10 mm;

blade lanceolate, 1–6 cm.

petiole to 7 mm;

blade linear to narrowly lanceolate or oblanceolate, 1.5–2.5 cm.
Inflorescences

open racemes, axis recurved at tip in bud;

buds pendent.

open racemes, sometimes few-branched, axis recurved at tip in bud;

buds pendent.
Flowers

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.

usually cleistogamous;

floral tube 1–3 mm;

sepals reflexed together to 1 side or in pairs;

corolla bowl-shaped, petals fading pink, obovate;

stamens 8, unequal, anthers white or cream, outer ones larger than inner.
Capsules

10–30 mm, beak 7–15 mm.

10–30 mm;

pedicel 5–11 mm.
Seeds

unknown.

brown, 0.5–1 mm, scaly, crest inconspicuous.
2n

= 18.

= 18.

Clarkia rostrata

Clarkia epilobioides
Phenology Flowering Apr–May. Flowering Apr–May.
Habitat Oak-pine woodlands. Shady sites, woodlands, chaparral.
Elevation 500 m. (1600 ft.) 0–1000 m. (0–3300 ft.)
Distribution
from FNA
CA
[BONAP county map]
from FNA
AZ; CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
Discussion

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.)

Clarkia epilobioides is known from south-central Arizona in Gila, Maricopa, Pima, and Pinal counties, and widely in west-central and southwestern California and adjacent Baja California, Mexico. In California, it occurs from Contra Costa and San Mateo counties in the San Francisco Bay area to San Diego County in the south, including most of the Channel Islands.

Clarkia epilobioides is modally self-pollinating, and up to half of its flowers do not open, yet set a full complement of seeds (H. Lewis and M. E. Lewis 1955). However, outcrossing does occur, and C. epilobioides is one of the parents of the tetraploid species C. similis, from which it differs by having white, unflecked petals; it is also one of the parents of the tetraploid C. delicata.

(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. Phaeostoma > subsect. Sympherica Onagraceae > subfam. Onagroideae > tribe Onagreae > Clarkia > sect. Phaeostoma > subsect. Micranthae
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. rubicunda, C. similis, C. speciosa, C. springvillensis, C. stellata, C. tembloriensis, C. unguiculata, C. virgata, C. williamsonii, C. xantiana
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. 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 epilobioides, Godetia epilobioides
Name authority W. S. Davis: Brittonia 22: 281. (1970) (Nuttall ex Torrey & A. Gray) A. Nelson & J. F. Macbride: Bot. Gaz. 65: 60. (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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