Phylogeny of the tribe Colletieae, Rhamnaceae

AAGESEN, LONE

BOTANICAL JOURNAL OF THE LINNEAN SOCIETY

Año: 1999 vol. 131 p. 1 - 43

0024-4074

A cladistic analysis based on 63 morphological characters was carried out on the tribe Colletieae including two presumed closely related genera, Ceanothus and Noltea as outgroups. In addition to a parsimony analysis of the equally weighted characters, analyses investigating the effects of character weighting, removal of a presumed hybrid species as well as the impact of uncertainly scored characters were undertaken. In all analyses Noltea was placed as sister group to a well supported monophyletic Colletieae. Nineteen different ingroup topologies were found, with the additional analyses mainly supporting two of them.Within the Colletieae a basal dichotomy divides Trevoa and Retanilla from the remainder of the tribe. While the Trevoa–Retanilla clade is fully resolved, the second lacks detailed resolution. Within this clade the Colletia species form a well supported monophyletic group, while monophyly of the disjunct genus Discaria could not be confirmed.