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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.
99 genera, 2060 species: worldwide, especially northern temperate and Africa. [Bennett & Matthews 2006 Amer J Bot 93:1039–1051] High yield losses in many crops caused by Orobanche species in Africa, Mediterranean, Middle East, and eastern Europe. —Scientific Editors: Robert Patterson, Bruce G. Baldwin.
Key to Orobanchaceae
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.Key to Orobanche
140 species: worldwide, especially Mediterranean. (Greek: vetch strangler, from parasitic habit) [Heckard 1973 Madroño 22:41–70]
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.
2n=24,48,72. Sandy flats, washes, on Asteraceae (generally Ambrosia, Encelia farinosa); -30–1500 m. Desert; to Utah, Arizona, Baja California. 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. Jan–May [Online Interchange]
Unabridged synonyms: [Orobanche ludoviciana Nutt. var. cooperi (A. Gray) Beck; Orobanche ludoviciana var. latiloba Munz]
Previous taxon: Orobanche californica subsp. jepsonii
Next taxon: Orobanche corymbosa
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Oct 25 2014
Citation for this treatment: [Author of taxon treatment] 2013. Orobanche, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=35468, accessed on Oct 25 2014
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|Geographic subdivisions indicated for the distribution of Orobanche cooperi|| 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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(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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