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Vascular Plants of California
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Eulobus californicus


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: 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.
Species In Genus: 4 species: 3 in Baja California, 1 from west-central California to western and southern Arizona, northwestern Mexico. 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
NATIVE
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]
Unabridged Reference: Raven 1969 Contr US Natl Herb 37:161--396
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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, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=25362, accessed on August 25, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on August 25, 2019.

Eulobus californicus
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© 2010 Neal Kramer
Eulobus californicus
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© 2004 Christopher L. Christie
Eulobus californicus
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© 2009 Keir Morse
Eulobus californicus
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© 2010 Neal Kramer
Eulobus californicus
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© 2010 Thomas Stoughton
Eulobus californicus
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© 2005 Christopher L. Christie

More photos of Eulobus californicus in CalPhotos



Geographic subdivisions for Eulobus californicus:
NCoRO (Sonoma Co.), SnJV (Fresno Co.), SCoR, SW, D
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map of distribution 1
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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.
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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.