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Oenothera elata subsp. hirsutissima

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: OenotheraView DescriptionDichotomous Key

Common Name: EVENING-PRIMROSE
Habit: Annual to perennial herb, generally from taproot, occasionally rhizomed. Leaf: basal or cauline, alternate, generally pinnately toothed to lobed, generally sessile. Inflorescence: spike, raceme-like, or flowers in axils of distal, reduced leaves. Flower: radial or (sect. Gaura) bilateral, generally opening at dusk; sepals 4, reflexed in flower (sometimes 2--3 remaining adherent); petals 4, yellow, white, rose, or +- purple, generally fading +- orange to +- purple, tip notched or toothed; stamens 8, filaments sometimes (sect. Gaura) with paired teeth at base, anthers attached at middle; ovary chambers 4, stigma generally deeply lobed, generally > anthers and cross-pollinated (or +- = anthers and self-pollinated). Fruit: generally dehiscent, cylindric to ovoid or obovoid, cylindric to 4-winged or -angled, straight to curved, generally sessile (base sometimes seedless, stalk-like). Seed: in generally 2(1--3) rows per chamber, or clustered or reduced to 1--4 per fruit.
Species In Genus: 145 species: America, some widely naturalized. Etymology: (Greek: wine-scented)
Unabridged Note: Many species self-pollinated; some of these have chromosome peculiarities (ring of 14 in meiosis) and +- 50% pollen fertility; they yield genetically identical offspring.
Species: Oenothera elataView Description 

Habit: Biennial, densely minutely strigose and (especially in inflorescence) glandular; hairs also long, appressed to spreading, sometimes with red, blister-like base. Stem: erect. Leaf: cauline 4--25 cm, oblanceolate to lanceolate or elliptic, generally dentate to +- entire. Inflorescence: spike. Flower: hypanthium 20--48(55) mm; sepals 27--48 mm; petals 25--52 mm, yellow fading red-orange. Fruit: 20--65 mm, 4--7 mm wide, narrowly lanceolate, +- straight. Seed: 1--1.8 mm, angled, irregularly pitted. Chromosomes: 2n=14.
Note: Generally cross-pollinated. 3 subspecies, 2 in California.

Oenothera elata subsp. hirsutissima (S. Watson) W. Dietr.
NATIVE
Stem: 10--25 dm. Flower: sepals green or red-flushed, hairs glandular or not, also spreading, red, blister-like base +- 0, free tips in bud 3--6 mm; anthers 8--15 mm.
Ecology: Moist places, generally inland; Elevation: < 2800 m. Bioregional Distribution: CA; Distribution Outside California: western United States, northwestern Mexico. Flowering Time: Jun--Sep Note: Several intergrading forms.
Synonyms: Oenothera hookeri Torr. & A. Gray subsp. angustifolia (R.R. Gates) Munz; Oenothera hookeri subsp. grisea (Bartlett) Munz; Oenothera hookeri subsp. venusta (Bartlett) Munz
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. Oenothera elata subsp. hirsutissima, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=51751, accessed on May 01, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 01, 2016.


Oenothera elata subsp. hirsutissima
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© 2013 Keir Morse
Oenothera elata subsp. hirsutissima
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© 2012 Steve Matson
Oenothera elata subsp. hirsutissima
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© 2008 Gary A. Monroe
Oenothera elata subsp. hirsutissima
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© 2005 George W. Hartwell
Oenothera elata subsp. hirsutissima
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© 2006 George W. Hartwell
Oenothera elata subsp. hirsutissima
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© 2011 Neal Kramer

More photos of Oenothera elata subsp. hirsutissima in CalPhotos


Geographic subdivisions for Oenothera elata subsp. hirsutissima:
CA;
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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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Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.