581.97281 Lun V Lundell, Cyrus Longworth, 1907- The vegetation of Petén. With an appendix: Studies of Mexican and Central American plants-I. By Cyrus Longworth Lundell. Washington, D. C., Carnegie Institution of Washington, 1937 ix, [l], 244p. 2 illus., plates, fold. map. diagrs. (2 fold.) 29 1/2- x 23cm (Carnegia Institution of Washington. Publication no. 478)