A SYNOPSIS OF THE GENUS PACKERA (ASTERACEAE: SENECIONEAE) IN MEXICO

摘要

The species of Packera (Asteraceae: Senecioneae) have been treated in the past as the "Aureoid" group within the genus Senecio. Fifteen species and three varieties of Packera are recognized in Mexico; a key, an account of the nomenclature, and statements of ranges and habitats are presented. Three new combinations are proposed: Packera scalaris var. parrasiana (Greenm.) C.C. Freeman & T.M. Barkley, comb, nov.; Packera scalaris var. carmenensis (C.C. Freeman) C.C. Freeman & T.M. Barkley, comb, nov.; and Packera zimapanica (Hemsley) C.C. Freeman & T.M. Barkley, comb. nov.