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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Perennial herb, shrub, generally ± green, parasitic on aboveground parts of woody plants; dioecious [monoecious]. Stem: brittle; 2° branches generally many. Leaf: simple, entire, opposite, 4-ranked, with blade or scale-like (then each pair generally fused). Inflorescence: spikes or cymes, axillary or terminal; bracts opposite, 4-ranked, scale-like, each pair fused. Flower: unisexual, radial, 2–4 mm; perianth parts in 1 series. Staminate flower: perianth parts 3–4(7); anthers generally sessile, opposite and generally on perianth parts. Pistillate flower: perianth parts generally 2–4; ovary inferior, 1-chambered, style unbranched, stigma ± obscure. Fruit: berry, shiny. Seed: 1(2), without thickened coat, gelatinous.
7 genera, ± 450 species: tropics, generally northern temperate. All parts of most members may be TOXIC. [Kuijt 2003 Syst Bot Monogr 66:1–643] Sometimes included in Loranthaceae; parasitic on plants in many other families. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Kuijt 1969 Biol Parasitic Fl Plants; Kuijt 1982 J Arnold Arbor 63:401–410; Kuijt 2003 Syst Bot Monogr 66:1–643]
Key to Viscaceae
Shrub, glabrous, evergreen. Stem: generally < 20 cm, rounded, green, less often ± red; 2° branches opposite or whorled. Leaf: with blade. Inflorescence: few-flowered cyme, dense, subtended by pair of fused bracts; peduncle 0 or short. Flower: perianth parts generally 4. Staminate flower: anthers several-chambered, cushion-like. Pistillate flower: perianth parts generally deciduous. Fruit: 6–10 mm, spheric, white in California, bird-dispersed; pedicel short, ± straight, or 0.
± 125 species: temperate, tropics, Old World. (Latin: from viscid seed cover) [Hawksworth & Scharpf 1987 Eur J Forest Pathol 16:1–5]
Previous taxon: Phoradendron leucarpum subsp. tomentosum
Next taxon: Viscum album
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 4 2015
Citation for this treatment: [Author of taxon treatment] 2013. Viscum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=10282, accessed on Sep 4 2015
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