Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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OROBANCHACEAE

BROOM-RAPE FAMILY

Lawrence R. Heckard

Annual, perennial herb, non-green root-parasites; roots modified into absorptive structures; plant an erect, fleshy, mostly underground stem (peduncle) with terminal inflorescence
Leaf: true leaves 0
Inflorescence: spike, raceme, or panicle; bracts alternate, scale-like
Flower bisexual; calyx cylindric or cup-shaped, lobes 0–5, persistent; corolla ± 2-lipped, lobes generally 5; stamens 4, epipetalous in 2 pairs (sometimes a 5th vestigial); ovary superior, chamber 1, placentas generally 2–4, parietal, simple or lobed, stigma generally 2–4-lobed, generally bowl- to funnel-shaped
Fruit: capsule, loculicidal; valves 2–4
Seeds many, small, angled; surface netted
Genera in family: 14 genera, 200 species: especially n temp
Reference: [Thieret 1971 J Arnold Arbor 52:404–432]
Recent taxonomic note: Recently treated to include hemiparasitic genera of Scrophulariaceae (e.g., Castilleja, Cordylanthus, Orthocarpus, Pedicularis, Triphysaria [Olmstead et al. 2001 Mol Phylogen Evol 16:96–112]
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OROBANCHE

BROOM-RAPE

Annual, perennial herb, generally glandular-puberulent above; root attachment sometimes tuber-like
Stem simple or branched
Inflorescence generally ± spike-like (lower 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 generally 4–5; corolla glandular-puberulent (hairs short and tack-shaped or long-stalked), generally lacking ring of hairs at stamen bases, upper lip erect to reflexed, generally 2-lobed, lower lip 3-lobed, spreading, yellow-lined; anthers glabrous to hairy; stigma lobes 2, spreading or peltate
Fruit 2-valved; placentas generally 2 or 4, often lobed
Seed < 0.7 mm
Species in genus: 140 species: worldwide, especially Medit
Etymology: (Greek: vetch strangler, from parasitic habit)
Reference: [Heckard 1973 Madroño 22:41–70]

Native

O. californica Cham. & Schldl.

Plant 4–35 cm, pale to dark purple aboveground, glandular-puberulent
Stems 1 or clustered, slender to stout, branched below or throughout
Inflorescence long or branched and ± flat- to convex-topped; pedicels 0–4 cm, shorter upward
Flower: calyx 12–20 mm, generally pale to pinkish, lobes linear-triangular, >> tube; corolla 20–50 mm, purplish or white to rose with darker veins, moderately glandular-puberulent, lips 10–14 mm, generally widely flaring; upper lip obtuse to rounded; anthers woolly; placentas 4, stigma lobes 2, triangular, margins recurved
Ecology: Generally dry, ± rocky soils, on herbs, generally Asteraceae
Elevation: < 2500 m.
Bioregional distribution: California Floristic Province (except s Channel Islands), Modoc Plateau, s East of Sierra Nevada
Distribution outside California: to British Columbia, Baja California
Synonyms: O. grayana G. Beck misapplied
Sspp. highly variable, intergrading.

Native

subsp. jepsonii (Munz) Heckard

Plant 10–35 cm
Stem generally branched, > 6 cm
Inflorescence 5–20 cm
Flower: corolla 25–40 mm, whitish or pinkish to pale yellowish brown, tube gradually widened to 5–8 mm, veins generally purplish
Chromosomes: 2n=48
Ecology: Uncommon. Generally dry flats, slopes, generally on herbs and shrubs of Asteraceae
Elevation: < 2200 m.
Bioregional distribution: Klamath Ranges, North Coast Ranges, Cascade Range, Sierra Nevada Foothills, Great Central Valley, San Francisco Bay Area, South Coast Ranges
Synonyms: O. grayana var. j. Munz
Plants < 12 cm with flat- to round-topped inflorescence on Heterotheca villosa in SCoRO have been called subsp. condensa Heckard. Stout plants from s CCo, s SCoRO, c SCo, n ChI that key here are an undescribed subsp.

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bioregional map for OROBANCHE%20californica%20subsp.%20jepsonii being generated
 
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Orobanche californica subsp. jepsonii
Retrieve dichotomous key for Orobanche
Overlay Consortium of California Herbaria specimen data by county on this map
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