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Eremothera boothii subsp. decorticans

SHREDDING 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 W. 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.
Etymology: (Greek: desert + Oenothera) 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
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 (Douglas) W.L. Wagner & Hoch subsp. decorticans (Hook. & Arn.) W.L. Wagner & Hoch
NATIVE
Habit: 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.
Ecology: Open, generally steep and rocky, especially shale slopes; Elevation: < 1850 m. Bioregional Distribution: s SNF, Teh, s SnJV, SnFrB, SCoRI, WTR. Flowering Time: Mar--Jun
Synonyms: Camissonia boothii (Douglas) P.H. Raven subsp. decorticans (Hook. & Arn.) P.H. Raven; Oenothera boothii Douglas subsp. decorticans (Hook. & Arn.) Munz; Oenothera boothii subsp. rutila (Davidson) Munz; Oenothera decorticans (Hook. & Arn.) Greene; Gaura decorticans Hook. & Arn.
Jepson eFlora Author: Warren L. Wagner
Reference: [Wagner et al. 2007 Syst Bot Monogr 83:1--240]
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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


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Citation for this treatment: Warren L. Wagner 2012, Eremothera boothii subsp. decorticans, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=89263, accessed on December 03, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on December 03, 2024.

Eremothera boothii subsp. decorticans
click for image enlargement
©2017 Neal Kramer
Eremothera boothii subsp. decorticans
click for image enlargement
©2017 Neal Kramer
Eremothera boothii subsp. decorticans
click for image enlargement
©2007 California Academy of Sciences
Eremothera boothii subsp. decorticans
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©2010 Neal Kramer
Eremothera boothii subsp. decorticans
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©2015 Barry Breckling

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Geographic subdivisions for Eremothera boothii subsp. decorticans:
s SNF, Teh, s SnJV, SnFrB, SCoRI, WTR.
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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 occurrence).






 

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

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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 Flowering-Fruiting Monthly Counts

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 (fruiting time in some monocot genera).