Rosidae (or Thorne's Rosanae), an idea supported by the presence of
is largely absent from the traditional Rosidae, with the tricolporate
This raises the possibility that this group represents a distinct "rosid" radiation separate from much of the traditional subclass Rosidae
with its possible sapindopsoid or cunoniaceous origins (Hickey & Wolfe, 1975; Takhtajan 1980, 1983; Cronquist, 1981; Dickison, 1989).
In the large structural study on Rosidae by Hufford (1992), several new results came out that were later confirmed by molecular studies, such as nonmonophyly of hamamelids, the close relationships of Loasaceae and Hydrangeaceae, and the position of Sarraceniaceae in asterids.
Rosidae and their relationships to other nonmagnoliid dicotyledons: A phylogenetic analysis using morphological and chemical data.
At the symposium on Evolution, Systematics and Fossil History of the Hamamelidae, held on 22-25 March 1988 at the University of Reading, England and sponsored by the Systematics Association, Bill gave a paper comparing primitive Rosidae
The diversity of stamen structures in 'lower' Rosidae
(Rosales, Fabales, Proteales, Sapindales).
and their relationships to other magnoliid dicotyledons: A phylogenetic analysis using morphological and chemical data.