Phytologia (March 1991) 70(3):209-225. TAXONOMIC NOTES ON CISTANTHE, CALANDRINIA, AND TALINUM (PORTULACACEAE) Mark A. Hershkovitz Department of Botany, University of California. Davis, California 95616 U.S.A ABSTRACT New combinations for South American species of Cistanthe are pro-vided along with taxonomic notes. Also, a new section of Calandrinia and a new combination in Talinum are established. The nomenclaniral changes reflect new morphological and cladistic data on Portulacaceae. KEY WORDS: Argentina, Calandrinia. Chile, Cisianthe, Mono-cosmia, Peru, Portalacaceae, Talinum. taxonomy In a previous paper (Hershkovitz 1990a), I established a sectional taxonomy and several combinations for Cistanthe Spach (Portulacaceae). These proposed changes reflected corroboration by leaf morphological evidence (Hershkovitz 1990b) of Carolin's (1987) cladistic analysis of Portulacaceae, in which he concluded that Cistanthe should be segregated from Calandrinia Kunth in H.B.K. I also proposed (Hershkovitz 1990b) that Monocosmia Fenzl in Endl. cL' Fenzl is phj'logenetically nested in Calandrinia and should be included therein. I provide below: (1) additional combinations for South American species of Cistanthe, along with miscellaneous notes and lists of material examined: (2) a sectional status for Monocosmia in Calandrinia] and (3) a new combination in Talinum Adans. for a species currently classified in Calandrinia. 1. Cistanthe NEW COMBINATIONS AND NOTES In my studies of leaf morphology in Portulacaceae (Hershkovitz 1990b), I noted that specimen identification and species delimitations of South American Cistanthe., heretofore classified in Calandrinia (of. Hershkovitz 1990a, 1990b) and Philippiam,ra Kuntze (= Silvaea Philippi), were not adequately facilitated 209
BioStor
