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|Jepson eFlora: Taxon page
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|Family: Orobanchaceae||View Description||Dichotomous Key|
|Genus: Orobanche||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Orobanche cooperi (A. Gray) A. Heller
Habit: Plant 10--40 cm, generally dark +- purple above ground, glandular-puberulent; root attachment occasionally a coral-like thickening. Stem: simple or branched, often forming large clumps, stout, little enlarged at base. Inflorescence: 4--5 cm wide; proximal pedicels < 5 cm, distal 0. Flower: calyx 8--12 mm, lobes 5, > tube, triangular, acuminate; corolla 18--32 mm, +- purple, hairs long-stalked, generally glandular, tube lacking ring of hairs, lips 5--10 mm, upper lobes 6--10 mm, > lower, obtuse; anthers generally hairy; stigma lobes 2, thin, recurved. Chromosomes: 2n=24,48,72.
Ecology: Sandy flats, washes, on Asteraceae (generally Ambrosia, Encelia farinosa); Elevation: -30--1500 m. Bioregional Distribution: D; Distribution Outside California: to Utah, Arizona, Baja California. Flowering Time: Jan--May Note: An undescribed form (probably best a subsp.), 2n=96, with smaller, shorter-lobed corolla and peltate, bowl-shaped stigma occurs on same hosts over range of sp.
Synonyms: Orobanche ludoviciana Nutt. var. cooperi (A. Gray) Beck; Orobanche ludoviciana var. latiloba Munz
eFlora Treatment Author: Alison E.L. Colwell & Lawrence R. Heckard
Jepson Online Interchange
Previous taxon: Orobanche californica subsp. jepsonii
Next taxon: Orobanche corymbosa
Citation for this treatment: Alison E.L. Colwell & Lawrence R. Heckard 2016. Orobanche cooperi, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=35468, accessed on August 29, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on August 29, 2016.