S^f.0^3 Vol. 77, pp. 127-156 30 October 1964 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTC STUDIES ON ANDEAN COMPOSITAE: By Jose Cuatrecasas Department of Botany, Smithsonian Institution, Washington, D.C. This continuation of my contributions to our knowledge of the Compositae of the Andes deals mainly with interesting collections made by Prof. H. Ellenberg in 1957 in connection with ecological research in several regions of Peru, and with specimens collected by Dr. J. J. Wurdack in his recent explora-tions of the region of Chachapoyas. Both extensive collections indicate a high degree of affinity between the floras of northern Peru (Jalca region) and the Ecuador-Colombian paramo. A more detailed discussion of these affinities will be presented after completion of the identification of all specimens. Cha-chapoyas having been the headquarters of Andrew Mathews, Wurdack found many topotype specimens of species based on Mathews' collections, but in his thorough explorations he also encountered a great number of undescribed species. Some of them are described here. A part of the novelties found in the Ellenberg collections of Compositae was published in my con-tribution TV of this series (Brittonia 12 3 , 1960). One of the most interesting findings of Ellenberg is a new genus in the Eupatorieae-Pickerinae, here proposed. An Ecuadorian col-lection by Barclay is also considered here. The work upon which this paper is based has been sponsored by the National Science Foundation. The preceding article of this series was published in the same Proceedings, vol. 74: 7-28, 1961. Diplostephium barclayanum Cuatr., sp. nov. Frutex ad 1 m altus ramis erectis terminalibus crasse denseque albo-lanatis. Folia alterna coriacea, lamina lineari-lanceolata apice brevissime 15— Proc. Biol. Soc. Wash., Vol. 77, 1964 ( 127) SMITHSONIAN **. tNSTmnioH OCT <| 7954
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