|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
Annual, parasitic vine
Stem twining, ± thread-like, yellow-green to bright orange, generally glabrous
Leaves 0 or scale-like, ± 2 mm, generally triangular to lanceolate
Inflorescence: cyme or cluster (rarely flowers solitary), generally head- or spike-like, axillary, sometimes bracted
Flower bisexual, radial; calyx generally persistent, lobes generally 45, generally overlapped; corolla generally deciduous, < 6 mm, mostly white, tube generally appendaged opposite stamens, lobes 45; stamens 45, alternate corolla lobes; ovary superior, chambers 2(3), 2-ovuled, styles generally 2, stigma generally 1 per style, generally ± head-like
Fruit: capsule (circumscissile or irregularly dehiscent) or berry-like
Genera in family: 1 genus, ± 150 species: especially Am tropical; some crop pests
Recent taxonomic note: Recently treated within Convolvulaceae [Angiosperm Phylogeny Group 1998 Ann Missouri Bot Gard 85:531553].
Etymology: (Arabic: ancient name)
Flower 2.64 mm; calyx persistent, lobes 5, spreading to recurved, lanceolate, acute to acuminate, 0.51 X corolla tube; corolla persistent, shallowly bell-shaped, gland-dotted, lobes 5, ± 36 mm, reflexed to spreading, lanceolate, acute, appendages 00.1 mm; filaments 0.71.4 mm, anthers 0.21.1 mm; ovary 12 mm, generally obovoid, gland-dotted, top generally depressed, styles 0.73 mm
Fruit 1.52 mm, enveloped by perianth, generally obovoid; top generally depressed
Ecology: On herbs and shrubs on roadsides, chaparral, grassland, yellow-pine forest
Elevation: generally < 2500 m.
Bioregional distribution: California Floristic Province, East of Sierra Nevada, Sonoran Desert
Distribution outside California: to Washington, Colorado, Mexico
Flower: corolla not papillate; ovary (and fruit) conic, top acute
Ecology: On herbs
Elevation: probably < 500 m.
Bioregional distribution: e Sonoran Desert (near Colorado River).