Jepson Flora Project: Jepson Interchange    

 
link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

    THIS PAGE IS NO LONGER UPDATED
    AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

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]
.

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. cooperi (A. Gray) A. Heller

Plant 10–40 cm, generally dark purplish aboveground, glandular-puberulent; root attachment sometimes a coral-like thickening
Stems simple or branched, often forming large clumps, stout, little enlarged at base
Inflorescence 4–5 cm wide; lower pedicels < 5 cm, upper 0
Flower: calyx 8–12 mm, lobes > tube, triangular, acuminate; corolla 18–32 mm, purplish, 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, Hymenoclea, Encelia ) (weed on tomatoes, DSon, in 1960's)
Elevation: < 500 m.
Bioregional distribution: Desert
Distribution outside California: to Utah, Arizona, Baja California
Flowering time: Jan–May
Synonyms: O. ludoviciana vars. c. (A. Gray) G. Beck and latiloba Munz
An undescribed form (probably best a subsp.), 2n=96, with smaller, shorter-lobed corolla and peltate, and bowl-shaped stigma occurs on same hosts, over range of sp.

previous taxon | next taxon
bioregional map for OROBANCHE%20cooperi being generated
 


Retrieve Jepson Interchange Index to Plant Names entry for Orobanche cooperi
Retrieve dichotomous key for Orobanche
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page
Glossary


University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California