Jepson Herbarium
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Indexes to all accepted names and synonyms: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

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 w 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 n CA. —Scientific Editors: Robert Patterson, Bruce G. Baldwin.
Unabridged references: [Munz 1965 North America Fl II 5:1–278]

Key to Onagraceae

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.
7 species: w North America. (Greek: desert + Oenothera) [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]

Plant generally ± red; rosette generally 0 (to well-developed); hairs minutely strigose and spreading, some glandular, especially in inflorescence.
Stem: erect, peeling.
Leaf: lanceolate to narrowly elliptic or narrowly ovate, sparsely minutely dentate or serrate; proximal oblanceolate or 0.
Inflorescence: nodding; flowers generally 0 at proximal nodes.
Flower: hypanthium 4–8 mm; sepals (2.7)4–8 mm; petals 3–7.5 mm, generally white (red).
Fruit: 8–35 mm, 1–3.8 mm wide, cylindric, tapered to tip, ± curved outward to strongly wavy and twisted, persistent, tardily dehiscent.
Seed: 1.4–2.1 mm, generally of 2 kinds, minutely pitted in rows, pale brown and coarsely papillate, dark brown.
2n=14. [Camissonia boothii (Douglas) P.H. Raven] Cross-pollinated. [Online Interchange]
Unabridged synonyms: [Oenothera boothii Douglas]

Plant stout, ± glabrous except inflorescence; rosette well developed.
Stem: 12–65 cm.
Leaf: generally 20–80 mm, generally lanceolate or proximal narrowly ovate, entire to minutely dentate.
Inflorescence: bracts inconspicuous.
Fruit: 1.7–2.3 mm wide, curved outward.
Open, generally steep and rocky, especially shale slopes; < 1850 m. s Sierra Nevada Foothills, Tehachapi Mountain Area, s San Joaquin Valley, San Francisco Bay Area, Inner South Coast Ranges, Western Transverse Ranges.

Previous taxon: Eremothera boothii subsp. condensata
Next taxon: Eremothera boothii subsp. desertorum

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].

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Bioregions in which taxon 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.
Chart based on elevation range in Manual and elevations and coordinates of CCH records. Data provided by the participants of the Consortium of California Herbaria. Note: About half of the CCH records include both elevation and coordinates.	Data provided by the participants of the Consortium of California Herbaria. View all CCH records   CCH collections by month Duplicates counted once; synonyms included. Species do not include records of infraspecific taxa. Blue line denotes Manual flowering time.