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Orobanche uniflora
NAKED BROOMRAPE

Higher Taxonomy
Family: OrobanchaceaeView DescriptionDichotomous Key

Common Name: BROOMRAPE FAMILY
Habit: Annual, perennial herb, shrub; often glandular; root-parasites, roots modified into absorptive structures. Stem: generally round in ×-section. Leaf: generally simple, generally alternate, reduced to +- fleshy scales in non-green plants lacking chlorophyll; stipules generally 0. Inflorescence: spike to panicle, generally bracted, or flowers 1--2 in axils. Flower: bisexual; calyx lobes 0--5; corolla generally strongly bilateral, generally 2-lipped (upper lip generally 2-lobed, lower lip generally 3-lobed), abaxial lobes outside other lobes in bud; stamens epipetalous, 4 in 2 pairs (sometimes 1 pair sterile), additional staminode 0(1), anther sacs unequal; ovary superior, chambers 1--2, placentas 2--4, parietal, style 1, stigma lobes 0 or 2. Fruit: capsule, generally +- ovoid, loculicidal, valves 2--4. Seed: many, small, angled; surface smooth or netted.
Genera In Family: 99 genera, 2060 species: worldwide, especially northern temperate and Africa. Note: High yield losses in many crops caused by Orobanche species in Africa, Mediterranean, Middle East, and eastern Europe.
eFlora Treatment Author: Margriet Wetherwax, except as noted
Scientific Editor: Robert Patterson, Bruce G. Baldwin.
Genus: OrobancheView DescriptionDichotomous Key

Common Name: BROOMRAPE
Habit: Annual, perennial herb, not green (holoparasites), generally glandular-puberulent distally; root attachment occasionally tuber-like. Stem: simple or branched. Inflorescence: generally +- spike-like (proximal flowers often short-pedicelled or on short branches), generally dense; flowers generally > 20; bracts generally lanceolate to deltate (wider on peduncle); bractlets 0 or 2. Flower: calyx lobes 4--5; corolla glandular-puberulent, generally lacking ring of hairs at stamen bases, upper lip erect to reflexed, 2-lobed, lower lip 3-lobed, spreading, throat floor with yellow folds; anthers glabrous to hairy; stigma lobes generally 2. Fruit: 2-valved; placentas generally 2, often lobed. Seed: < 0.7 mm.
Species In Genus: 140 species: worldwide, especially Mediterranean. Etymology: (Greek: vetch strangler, from parasitic habit)
eFlora Treatment Author: Alison E.L. Colwell & Lawrence R. Heckard

Orobanche uniflora L.
NATIVE
Stem: 0.5--5 cm. Inflorescence: generally raceme; flowers generally 1--3; bracts generally < 6, generally glabrous; pedicels 3--12 cm, scapose, bractlets 0. Flower: calyx lobes 5, generally 4--8 mm, > tube, narrowly triangular; corolla 12--35 mm, +- horizontal, generally pale +- purple to +- yellow, lobes generally rounded, minutely ciliate; anthers generally hairy; stigma lobes 2, margins recurved; orange nectary gland at base of ovary. Chromosomes: 2n=36,48,+-70.
Ecology: Generally moist places, on herbs, especially Sedum, Saxifragaceae, Asteraceae; Elevation: < 3100 m. Bioregional Distribution: NW, CaR, SN, ScV (Sutter Buttes), CW, SCo, n ChI, Wrn; Distribution Outside California: to Yukon Territory, eastern North America. Flowering Time: Apr--Jul Note: If recognized taxonomically, plants < 20 cm of northern and central California to Canada with corollas deep violet, 25--35 mm, assignable to Orobanche uniflora var. purpurea (A. Heller) Achey.
eFlora Treatment Author: Alison E.L. Colwell & Lawrence R. Heckard
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Previous taxon: Orobanche ramosa
Next taxon: Orobanche valida

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botanical illustration including Orobanche uniflora

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Citation for this treatment: Alison E.L. Colwell & Lawrence R. Heckard 2016. Orobanche uniflora, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=35481, accessed on February 08, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 08, 2016.


Orobanche uniflora
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© 2005 Keir Morse
Orobanche uniflora var. purpurea
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© 2012 Gary A. Monroe
Orobanche uniflora
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© 2005 Aaron Schusteff
Orobanche uniflora
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© 2009 Barry Breckling
Orobanche uniflora
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© 2008 Keir Morse
Orobanche uniflora
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© 2008 Keir Morse

More photos of Orobanche uniflora in CalPhotos


Geographic subdivisions for Orobanche uniflora:
NW, CaR, SN, ScV (Sutter Buttes), CW, SCo, n ChI, Wrn;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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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.