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Key to families | Table of families and genera
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|Family: Onagraceae||View Description||Dichotomous Key|
|Genus: Oenothera||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Oenothera longissima Rydb.
Habit: Biennial, rosetted, minutely strigose; hairs also generally long, spreading, with red, bristle-like base, sometimes some glandular. Stem: erect, 6--30 dm. Leaf: cauline 5--22 cm, narrowly oblanceolate to +- elliptic, +- entire to dentate. Inflorescence: spike. Flower: hypanthium 60--135 mm; sepals 23--47 mm, free tips in bud 2--6 mm; petals 28--65 mm, yellow fading red-orange. Fruit: 25--55 mm, 4--9 mm wide, +- cylindric, +- straight. Seed: 1--2 mm, angled, irregularly pitted. Chromosomes: 2n=14.
Ecology: Seasonally moist places in creosote-bush scrub, pinyon/juniper woodland; Elevation: 1000--1700 m. Bioregional Distribution: e DMtns (New York Mtns); Distribution Outside California: to Colorado, Arizona. Flowering Time: Jul--Sep Note: Generally cross-pollinated.
Synonyms: Oenothera longissima subsp. clutei (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
Previous taxon: Oenothera laciniata
Next taxon: Oenothera primiveris
Citation for this treatment: Warren L. Wagner & Peter C. Hoch, family description, key to genera; treatment of genera by Warren L. Wagner 2017. Oenothera longissima, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=35019, accessed on February 26, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 26, 2017.