, Volume 49, Issue 2, pp 181–188 | Cite as

Phoradendron olae Kuijt, a new species from Mexico pivotal in the taxonomy of the genus, with comments on P. californicum Nutt.

  • Job Kuijt


Materials are presented to the effect thatPhoradendron californicum Nutt., the nomenclatural type of the genusPhoradendron (Viscaceae), is related to southern, cataphyllous species, not to northern, acataphyllous ones. The evidence consists of the frequent occurrence of basal cataphylls in the species, variation in basal phyllotaxy, and a basically biseriate arrangement of flowers on fertile internodes. The suggestion of this southern, cataphyllous affinity is supported by the recent discovery of a strictly cataphyllous Mexican species,P. olae Kuijt, which shows median basal phyllotaxy and is in many features extremely similar toP. californicum. The nomenclatural consequences of this discovery would lead to subgen.Boreales (Trel.) Engler (and probably subgen.Aequatoriales (Trel.) Engler) being synonymized under subgen.Phoradendron, characterized by basal cataphylls (though not in all species). However, no generic subdivision of any sort is supported at this time.

Key words

Phoradendron Boreales Aequatoriales Viscaceae Mexico 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature Cited

  1. Engler, A. & K. Krause. 1935. Loranthaceae.In: A. Engler & K. Prantl, Die natürlichen Pflanzenfamilien. Ed. 2. 16b: 98–203.Google Scholar
  2. Kuijt, Job. 1959. A study of heterophylly and inflorescence structure inDendrophthora andPhoradendron (Loranthaceae). Acta Bot. Neerl. 8: 506–546.Google Scholar
  3. Kuijt, Job. 1973. Further evidence for the systematic position ofPsittacanthus sonorae (Loranthaceae). Madroño 22: 177–185.Google Scholar
  4. Kuijt, Job. 1986. Observations on establishment and early shoot emergence ofViscum minimum (Viscaceae). Canad. J. Bot. 64: 1075–1080.CrossRefGoogle Scholar
  5. Kuijt, Job. 1989. A note on the germination and establishment ofPhoradendron californicum (Viscaceae). Madroño 36: 175–179.Google Scholar
  6. Kuijt, Job. 1996. Cataphylls and taxonomy inPhoradendron andDendrophthora (Viscaceae). Acta Bot. Neerl. 45: 263–277.Google Scholar
  7. Trelease, W. 1916. The genusPhoradendron. University of Illinois Press, Urbana.Google Scholar
  8. Urban, I. 1898. Über die Loranthaceen-GattungDendrophthora Eichl. Ber. Deutsch. Bot. Gesells. 14: 284–294.Google Scholar
  9. Wiens, D. 1964. Revision of acataphyllous species ofPhoradendron. Brittonia 16: 11–54.CrossRefGoogle Scholar

Copyright information

© The New York Botanical Garden 1997

Authors and Affiliations

  • Job Kuijt
    • 1
  1. 1.Department of BiologyUniversity of VictoriaVictoriaCanada

Personalised recommendations