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Vascular Plants of California
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Eulobus californicus

Higher Taxonomy
Family: OnagraceaeView DescriptionDichotomous Key
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 W. Patterson, Bruce G. Baldwin.
Genus: EulobusView Description 

Habit: Annual to subshrub, from taproot; stem often thick and fleshy. Leaf: basal and/or cauline, alternate, simple, narrowly elliptic to narrowly lanceolate, pinnately lobed to occasionally entire. Inflorescence: loose wand-like spike. Flower: opening at dawn; hypanthium short, +- with a lobed, red-brown, fleshy disk within; sepals 4, reflexed (occasionally 2--3 remaining adherent); petals 4, yellow, finely flecked with red near base, this area not ultraviolet reflective, remainder of petals strongly so, fading orange-red; longer stamens opposite sepals, anthers attached at middle, pollen grains 3-angled; stigma +- hemispheric or cylindric, generally > anthers and cross-pollinated, or +- = anthers and self-pollinated. Fruit: straight to curved, sessile. Seed: in 1 row per chamber, narrowly obovoid, finely papillate, generally purple-spotted.
Etymology: (Greek: well lobed) 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
Eulobus californicus Nutt. ex Torr. & A. Gray
Habit: Annual, +- glabrous or leaves minutely strigose, inflorescence sparsely glandular-hairy; rosette well developed. Stem: erect, straight, 2--180 cm, slender, +- glaucous or green. Leaf: < 30 cm, narrowly elliptic, irregularly and sharply pinnately lobed, much reduced distally on stem. Inflorescence: flowers widely spaced. Flower: hypanthium 0.6--1.5 mm; sepals 3.9--8 mm; petals 6--14 mm. Fruit: reflexed, 45--110 mm, cylindric early, drying 4-angled, +- straight. Seed: 1.3--1.6 mm, olive-green, purple-spotted. Chromosomes: 2n=14,28.
Ecology: Open places in coastal-sage scrub, chaparral, desert scrub; Elevation: < 1300 m. Bioregional Distribution: NCoRO (Sonoma Co.), SnJV (Fresno Co.), SCoR, SW, D; Distribution Outside California: southern and western Arizona, northwestern Mexico. Flowering Time: Apr--Jun Note: Self-pollinated.
Synonyms: Camissonia californica (Nutt. ex Torr. & A. Gray) P.H. Raven; Oenothera leptocarpa Greene
Jepson eFlora Author: Warren L. Wagner
Reference: [Wagner et al. 2007 Syst Bot Monogr 83:1--240]
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Eulobus californicus

botanical illustration including Eulobus californicus

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Citation for this treatment: Warren L. Wagner 2012, Eulobus californicus, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on June 23, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora,, accessed on June 23, 2024.

Eulobus californicus
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©2010 Thomas Stoughton
Eulobus californicus
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©2010 Neal Kramer
Eulobus californicus
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©2009 Barry Breckling
Eulobus californicus
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©2023 Neal Kramer
Eulobus californicus
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©2010 Neal Kramer

More photos of Eulobus californicus
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Geographic subdivisions for Eulobus californicus:
NCoRO (Sonoma Co.), SnJV (Fresno Co.), SCoR, SW, D
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).


Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

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 (fruiting time in some monocot genera).