publication venue for Phylogenetic relationships and evolution of growth form in Cactaceae (Caryophyllales, Eudicotyledoneae). 98:44-61. 2011-01-01 New insights into the phylogenetic relationships, character evolution, and phytogeographic patterns of Calceolaria (Calceolariaceae). 96:2240-2255. 2009-01-01 Specialization clines in the pollination systems of agaves (agavaceae) and columnar cacti (cactaceae): A phylogenetically controlled meta-analysis. 96:1887-1895. 2009-01-01