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Eremothera minor
NELSON'S EVENING-PRIMROSE

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).

Eremothera minor (A. Nelson) W.L. Wagner & Hoch
NATIVE
Habit: Plant generally +- red, generally densely and minutely +- gray strigose, in inflorescence also glandular; rosette +- 0. Stem: +- erect, 3--30 cm, peeling. Leaf: 5--45 mm, +- oblanceolate; distal-most +- linear, +- entire. Inflorescence: erect; flowers from plant base. Flower: hypanthium 0.5--1.9 mm; sepals 0.8--1.8 mm; petals 0.8--1.3 mm, white fading +- red. Fruit: 15--25 mm, 0.8--1.2 mm wide, spreading, +- cylindric, tapered to tip, twisted and wavy. Seed: 1.1--1.2 mm, minutely pitted in rows. Chromosomes: 2n=14.
Ecology: Sandy slopes, flats, sagebrush scrub; Elevation: +- 1200 m. Bioregional Distribution: MP (Wendel, Surprise Valley); Distribution Outside California: to Washington, Wyoming, Colorado. Flowering Time: Apr--Jul Note: Self-pollinated.
Synonyms: Camissonia minor (A. Nelson) P.H. Raven; Oenothera minor (A. Nelson) Munz
eFlora Treatment Author: Warren L. Wagner & Peter C. Hoch, family description, key to genera; treatment of genera by Warren L. Wagner
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

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Citation for this treatment: Warren L. Wagner & Peter C. Hoch, family description, key to genera; treatment of genera by Warren L. Wagner 2016. Eremothera minor, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=89223, accessed on February 12, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 12, 2016.


Geographic subdivisions for Eremothera minor:
MP (Wendel, Surprise Valley);
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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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).

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Data provided by the participants of the Consortium of California Herbaria.
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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.