Flora of North America species comparison

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Clarkia biloba

two lobed clarkia, twolobe clarkia
Stems

erect, 30–100 cm, strigillose.
Leaves

petiole to 15 mm;

blade linear to lanceolate, 2–8 cm.
Inflorescences

open racemes, axis recurved at tip in bud;

buds pendent.
Flowers

floral tube 1–4 mm;

sepals reflexed together to 1 side;

corolla rotate to bowl-shaped, petals purplish to pale pink, lavender, or bright pink to magenta, often red-flecked, broadly to narrowly fan-shaped, 10–25 mm, shallowly to deeply 2-lobed;

stamens 8, unequal, outer anthers lavender, inner ones smaller, paler.
Capsules

10–25 mm.
Seeds

brown, 1 mm, minutely scaly to puberulent, crest inconspicuous.

Clarkia biloba
Distribution
from USDA
California
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 3 (3 in the flora).

Clarkia biloba is most closely related to C. lingulata, which is derived from C. biloba subsp. australis. Some populations of C. biloba subsp. brandegeeae (originally described as a form of C. dudleyana) are morphologically very similar to some individuals of C. dudleyana but the two taxa are separated geographically, have different chromosome numbers, and hybrids between them are sterile.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Clarkia > sect. Phaeostoma > subsect. Lautiflorae
Sibling taxa
C. affinis, C. amoena, C. arcuata, C. australis, 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
Subordinate taxa
C. biloba subsp. australis, C. biloba subsp. biloba, C. biloba subsp. brandegeeae
Key
1. Petals bright pink to magenta, narrowly fan-shaped, length greater than 1.5 times width.
subsp. australis
1. Petals lavender to pale or purplish pink, broadly fan-shaped, length not greater than 1.5 times width.
→ 2
2. Petals purplish to pale pink, deeply 2-lobed, lobes usually 1/5–1/2 petal length.
subsp. biloba
2. Petals lavender, shallowly 2-lobed, lobes usually less than 1/5 petal length, sometimes obscure.
subsp. brandegeeae
Synonyms Oenothera biloba, Godetia biloba
Name authority (Durand) A. Nelson & J. F. Macbride: Bot. Gaz. 65: 60. (1918)
Source FNA vol. 10. Treatment authors: Harlan Lewis†, Peter C. Hoch.
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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