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ONAGRACEAE EVENING-PRIMROSE FAMILY

Warren L. Wagner & Peter C. Hoch, family description, key to genera; treatment of genera by Warren L. Wagner, except as noted

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.
22 genera, ± 657 species: worldwide, especially western North America; many cultivated (Clarkia, Epilobium, Fuchsia, Oenothera). [Wagner et al. 2007 Syst Bot Monogr 83:1–240] Gaura moved to Oenothera. Fuchsia magellanica Lam. naturalized in northern California. —Scientific Editors: Robert Patterson, Bruce G. Baldwin.
Unabridged references: [Munz 1965 North America Fl II 5:1–278]

Key to Onagraceae

EULOBUS
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.
4 species: 3 in Baja California, 1 from west-central California to western and southern Arizona, northwestern Mexico. (Greek: well lobed) [Wagner et al. 2007 Syst Bot Monogr 83:1–240] Incl in Camissonia in TJM (1993).
Unabridged references: [Raven 1969 Contr US Natl Herb 37:161–396]

E. californicus Torr. & A. Gray
NATIVE
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.
2n=14,28. Open places in coastal-sage scrub, chaparral, desert scrub; < 1300 m. Outer North Coast Ranges (Sonoma Co.), San Joaquin Valley (Fresno Co.), South Coast Ranges, Southwestern California, Desert; southern and western Arizona, northwestern Mexico. [Camissonia californica (Torr. & A. Gray) P.H. Raven] Self-pollinated. Apr–Jun [Online Interchange]
Unabridged synonyms: [Oenothera leptocarpa Greene; Camissonia californica (Nutt. ex Torr. & A. Gray) P.H. Raven]
Unabridged note: Expanded author citation: Eulobus californicus Nutt. ex Torr. & A. Gray

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 24 2014
Citation for this treatment: [Author of taxon treatment] 2013. Eulobus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=25362, accessed on Jul 24 2014

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Bioregions in which Eulobus californicus occurs Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.