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Eremothera boothii subsp. alyssoides
PINE CREEK 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).
Species: Eremothera boothiiView Description 

Habit: 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. Chromosomes: 2n=14.
Note: Cross-pollinated.

Eremothera boothii subsp. alyssoides (Hook. & Arn.) W.L. Wagner & Hoch
NATIVE
Habit: Plant hairs generally densely, minutely strigose (especially in inflorescence, hairs rarely spreading or glandular). Stem: 3--35 cm. Leaf: 10--40 mm, lanceolate to narrowly ovate; proximal oblanceolate or 0. Inflorescence: bracts leaf-like; flowers sometimes present at proximal nodes. Fruit: 1--1.4 mm wide, generally strongly wavy and twisted. Seed: all alike.
Ecology: Sandy slopes, flats, generally sagebrush scrub; Elevation: 600--1700 m. Bioregional Distribution: MP, W&I; Distribution Outside California: to southern Idaho, western Utah. Flowering Time: May--Aug Note: Intergrades widely with subspecies Eremothera boothii subsp. boothii, Eremothera boothii subsp. intermedia in Nevada; much like Eremothera boothii subsp. desertorum.
Synonyms: Camissonia boothii (Douglas) P.H. Raven subsp. alyssoides (Hook. & Arn.) P.H. Raven; Oenothera alyssoides Hook. & Arn.
eFlora Treatment Author: Warren L. Wagner & Peter C. Hoch, family description, key to genera; treatment of genera by Warren L. Wagner
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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 boothii subsp. alyssoides, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=89260, accessed on July 27, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on July 27, 2016.


Geographic subdivisions for Eremothera boothii subsp. alyssoides:
MP, W&I;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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.