Pp. vii plus 111 plus 6 reference plus 8 index. Institute of Andean Biology, University of San Marcos, Lima, Peru, 1948. John Hopkins Press, Baltimore, Maryland
First Edition. pp. xxviii and 1294. Figs. 252 (129 in color) grouped in 45 plates. Flexible fabricoid, fore-edge index. The Blakiston Company, Philadelphia, 1949. $8.50