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Vascular Plants of California
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Eremothera chamaenerioides


Higher Taxonomy
Family: OnagraceaeView DescriptionDichotomous Key
Common Name: EVENING-PRIMROSE FAMILY
Habit: Annual to perennial herb (to tree). Leaf: cauline or basal, alternate, opposite, or whorled, generally simple and toothed (to pinnately compound); stipules 0 or generally deciduous. Inflorescence: spike, raceme, panicle, or flowers 1 in axils; bracted. Flower: generally bisexual, generally radial, often opening at either dawn or dusk; hypanthium generally prolonged beyond ovary (measured from ovary tip to sepal base); sepals 4(2--7); petals 4(2--7, rarely 0), often fading darker; stamens 2 × or = sepals in number, anthers 2-chambered, opening lengthwise, pollen interconnected by threads; ovary inferior, chambers generally as many as sepals (sometimes becoming 1), placentas axile or parietal, ovules 1--many per chamber, style 1, stigma 4-lobed (or lobes as many as sepals), club-shaped, spheric, or hemispheric. Fruit: capsule, loculicidal (sometimes berry or indehiscent and nut-like). Seed: sometimes winged or hair-tufted.
Genera In Family: 22 genera, +- 657 species: worldwide, especially western North America; many cultivated (Clarkia, Epilobium, Fuchsia, Oenothera). Note: Gaura moved to Oenothera. Fuchsia magellanica Lam. naturalized in northern California.
eFlora Treatment Author: Warren L. Wagner & Peter C. Hoch, family description, key to genera, treatment of genera by Warren L. Wagner, except as noted
Scientific Editor: Robert Patterson, Bruce G. Baldwin.
Genus: EremotheraView DescriptionDichotomous Key


Habit: Annual from taproot. Leaf: basal and/or cauline, alternate, simple to 2-pinnate. Inflorescence: spike. Flower: opening at dusk; sepals 4, reflexed singly or in pairs; petals 4, generally white, pink, or rarely red, without spots or ultraviolet reflective area, fading red; longer stamens opposite sepals, anthers attached at middle, pollen grains 3-angled; stigma hemispheric, generally > anthers and cross-pollinated or +- = anthers and self-pollinated. Fruit: straight to coiled, sessile. Seed: in 1 row per chamber, obovoid to oblanceoloid, minutely pitted, sometimes those near base of fruit coarsely papillate.
Species In Genus: 7 species: western North America. Etymology: (Greek: desert + Oenothera) Note: Incl in Camissonia in TJM (1993).
eFlora Treatment Author: Warren L. Wagner
Reference: [Wagner et al. 2007 Syst Bot Monogr 83:1--240]
Unabridged Reference: Raven 1969 Contr US Natl Herb 37:161--396
Eremothera chamaenerioides (A. Gray) W.L. Wagner & Hoch
NATIVE
Habit: Plant generally +- red, glandular-hairy, inflorescence also minutely strigose; rosette generally +- 0. Stem: erect, 8--50 cm, peeling. Leaf: < 80 mm, narrowly elliptic to narrowly lanceolate, sparsely minutely dentate. Inflorescence: nodding. Flower: hypanthium 1.6--2.3 mm; sepals 1.5--2.5 mm; petals 1.8--3 mm, white fading +- red. Fruit: 35--55 mm, 0.8--0.9 mm wide, spreading, cylindric, +- straight. Seed: 0.9--1 mm, minutely pitted in rows. Chromosomes: 2n=14.
Ecology: Sandy slopes, flats, desert scrub; Elevation: +- -50--1300 m. Bioregional Distribution: W&I, D; Distribution Outside California: to Utah, Texas, northwestern Mexico. Flowering Time: Mar--Jun Note: Self-pollinated. Related to Eremothera refracta.
Synonyms: Camissonia chamaenerioides (A. Gray) P.H. Raven; Oenothera chamaenerioides A. Gray
Jepson eFlora Author: Warren L. Wagner
Reference: [Wagner et al. 2007 Syst Bot Monogr 83:1--240]
Unabridged Reference: Raven 1969 Contr US Natl Herb 37:161--396
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Citation for this treatment: Warren L. Wagner 2012, Eremothera chamaenerioides, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=89222, accessed on May 22, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on May 22, 2019.

Eremothera chamaenerioides
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© 2015 Keir Morse
Eremothera chamaenerioides
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© 2015 Keir Morse
Eremothera chamaenerioides
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© 2004 James M. Andre
Eremothera chamaenerioides
click for enlargement
© 2015 Keir Morse
Eremothera chamaenerioides
click for enlargement
© 2015 Keir Morse
Eremothera chamaenerioides
click for enlargement
© 2015 Keir Morse

More photos of Eremothera chamaenerioides in CalPhotos



Geographic subdivisions for Eremothera chamaenerioides:
W&I, D
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map of distribution 1
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.