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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
Perennial, woody at least at base, glabrous or short-hairy. Stem: generally > 20 cm, not angled, green, less often ± red. Leaf: with blade or < 1 mm, scale-like. Inflorescence: spikes, few- to many-flowered, peduncled; flowers ± sunken into axis. Flower: perianth parts generally 3. Staminate flower: anthers 2-chambered. Pistillate flower: perianth parts persistent. Fruit: ± 3–6 mm, ± spheric, 1-colored, white, pink, or ± red, bird-dispersed; pedicel 0.Key to Phoradendron
± 240 species: temperate, tropical America. (Greek: tree thief) [Abbott & Thompson 2011 J Bot Res Inst Texas 5:139–141; Kuijt 2003 Syst Bot Monogr 66:1–643]
Unabridged note: Phoradendron leucarpum (Raf.) Reveal & M.C. Johnst. (Phoradendron serotinum (DC.) A. Gray; name change relative to TJM2 made necessary by ruling of Committee for Spermatophyta) collected in Texas for sale nationally in Christmas trade; other species similarly important locally. Plants at some sites (e.g., Pinnacles National Monument) do not conform to key(s) and/or descriptions, as to hosts and/or morphology (see Kuijt 2003); such problems thus far unsolved, though minimized here.
Stem: 2–8 dm, erect or pendent, generally woody only at base, ± green or yellow-green, glabrous; internodes 5–20 mm. Leaf: < 1 mm, scale-like. Staminate inflorescence: fertile internodes 1(2), 6(8)-flowered. Pistillate inflorescence: fertile internode 1, 2-flowered. Fruit: ± 4 mm, pink-white, glabrous.
Pinyon/juniper woodland, ponderosa-pine forest, on Calocedrus decurrens, Juniperus; 1700–2600 m. Klamath Ranges, North Coast Ranges, High Cascade Range, n Sierra Nevada Foothills, High Sierra Nevada, Inner South Coast Ranges, Transverse Ranges, Peninsular Ranges, Great Basin Floristic Province, Mojave Desert; to Oregon, Colorado, Texas, Mexico. Jul–Sep [Online Interchange]
Unabridged synonyms: [Phoradendron libocedri (Engelm.) Howell]
Previous taxon: Phoradendron californicum
Next taxon: Phoradendron leucarpum
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Mar 6 2015
Citation for this treatment: [Author of taxon treatment] 2013. Phoradendron, Revision 1, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=37902, accessed on Mar 6 2015
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|Geographic subdivisions indicated for the distribution of Phoradendron juniperinum|| 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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