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A revised classification of Santalales

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Abstract:

We present here a revised classification of Santalales, an angiosperm order that contains 18 families, 160 genera, and over 2200 species. Both nonparasitic and parasitic flowering plants occur in the traditionally circumscribed family Olacaceae whereas all other families are composed entirely of parasites. The five evolutionary radiations of aerial parasitism produced mistletoes that constitute most of the generic and specific diversity seen in the order. This classification, although based primarily upon results from molecular phylogenetic investigations, brings together all currently available information that contributes to our understanding of relationships among these plants. Monophyletic groups (clades) obtained from molecular analyses were named using a Linnaean ranked system. Four new families are named that formerly resided in Santalaceae s.l.: Amphorogynaceae, Cervantesiaceae, Comandraceae, and Nanodeaceae. A new tribal and subtribal classification for Loranthaceae is presented where nine new subtribe names are proposed.

Keywords: CLASSIFICATION; MISTLETOE; MONOPHYLETIC; PARASITIC PLANT; SANDALWOOD ORDER

Document Type: Research Article

Affiliations: 1: Department of Plant Biology, Southern Illinois University, 1125 Lincoln Drive, Carbondale, Illinois 62901-6509, U.S.A.;, Email: nickrent@plant.siu.edu 2: UMR1259 GenHort, AGROCAMPUS OUEST Centre d'Angers / Institut National d'Horticulture et de Paysage, INRA, Univ-Angers, 2 rue Le Nôtre, 49045 Angers, France 3: Laboratorio Ecotono, CONICET - Universidad Nacional del Comahue, Quintral 1250, (8400) Bariloche, Argentina 4: Department of Biology, Utah State University, 5305 Old Main Hill, Logan, Utah 84322, U.S.A.

Publication date: April 1, 2010

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