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

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



Frank G. Hawksworth and Delbert Wiens

Perennial, shrub, generally ± green, parasitic on aboveground parts of woody plants, dioecious or monoecious
Stem brittle; 2° branches generally many
Leaves simple, entire, opposite, 4-ranked, with blade or leaves scale-like (then each pair generally fused)
Inflorescence: spikes or open cymes, generally axillary, sometimes terminal; bracts opposite, 4-ranked, scale-like, each pair fused
Flower unisexual, radial, 2–4 mm; perianth parts in generally ± 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, gelatinous
Seeds 1(–2), without thickened coat
Genera in family: 7 genera, ± 450 species: tropical, generally n temp
Reference: [Kuijt 1982 J Arnold Arbor 63:401–410]
Sometimes included in Loranthaceae; parasitic on plants in many other families. Frs generally dispersed by birds or seeds explosively ejected. All parts of most members may be TOXIC.



Shrub, woody at least at base, glabrous or hairy, dioecious in CA
Stem generally > 20 cm, rounded, green, less often reddish
Leaf with blade or leaf scale-like (then each pair fused)
Inflorescence: spikes, many-flowered, open or ± interrupted, short-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 reddish, maturing (in temp) in 2 seasons, dispersed by consumption (by birds); pedicel 0
Species in genus: ± 200 species: temp, tropical Am
Etymology: (Greek: tree thief)
P. tomentosum (DC.) A. Gray collected in Texas for sale nationally in Christmas trade; other species similarly important locally
Reference: [Wiens 1974 Brittonia 16:11–54]


P. macrophyllum (Engelm.) Cockerell


Stem > 1 m, ± erect, green, short-hairy, especially near tip, ± glabrous in age; internodes 22–59 mm
Leaf 30–42 mm, 15–23 mm wide, obovate to elliptic-round, ± petioled to ± not, generally glabrous, if hairy not very densely so
Staminate inflorescence: fertile internodes 2–5(7), generally 30–35-flowered
Pistillate inflorescence: fertile internodes 2–4(5), 6–10(20)-flowered
Fruit ± 4–5 mm, white, pink-tinged or not, glabrous
Chromosomes: n=14
Ecology: On woody dicots other than Quercus (especially Alnus, Fraxinus, Juglans, Platanus, Populus, Prosopis, Robinia, Salix )
Elevation: < 1200 m.
Bioregional distribution: Outer North Coast Ranges, Inner North Coast Ranges, Sierra Nevada Foothills, Great Central Valley, Central Western California, South Coast, Transverse Ranges, Peninsular Ranges, Desert
Distribution outside California: to Colorado, w Texas, Baja California
Flowering time: Dec–Mar
Synonyms: P. flavescens (Pursh) A. Gray var. m. Engelm.; P. tomentosum subsp. m. (Engelm.) Wiens

previous taxon | next taxon
bioregional map for PHORADENDRON%20macrophyllum being generated

Retrieve Jepson Interchange Index to Plant Names entry for Phoradendron macrophyllum
Retrieve dichotomous key for Phoradendron
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

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