You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
After discussing briefly the morphological homogeneity of the classical Sympetalae, where only true sympetaly occurs, the author gives a summary of the systems of orders of Sympetalae by Wettstein (1935), Melchior (1964) and Cronquist (1957, 1965, 1968). He proposes then a new system of orders and families based on the main evolutionary and progressive tendencies prevailing in the living Sympetalae. This system starts with the most simple haplostemonous and tetracyclic orders: the Ligustrales and Plantaginales, to end with the diplostemonous Ericales and finally with the pleiomerous Ebenales.
Bulletin du Jardin botanique National de Belgique / Bulletin van de Nationale Plantentuin van België © 1972 Botanic Garden Meise