LANKESTERIANA LA REVISTA CIENTIFICA DEL JARDIN BOTANICO LANKESTER UNIVERSIDAD DE COSTA RICA Editors CARLOS 0. MORALES FRANCO PUPULIN Editorial Board MARTA ALEIDA DIAZ ERIC HAGSATER JOHN T. ATWOOD DORA EMILIA MORA-RETANA ROBERT L. DRESSLER PHILIP SEATON JOAQUIN GARCIA-CASTRO JORGE WARNER Scientific Board J. ACKERMANN M. GRAYUM D.H. BENZING B.E. HAMMEL G. CARNEVALI D.H. JANZEN M. CHASE M. LOWMAN T. CROAT H. LUTHER P. CRIBB J. MONGE-NAJERA G. GERLACH A. PRIDGEON L.D. GOMEZ G. ROMERO J. GOMEZ-LAURITO N.H. WILLIAMS LANKESTERIANA is published at irregular intervals at prices listed below by the Jardin Botanico Lankester, Universidad de Costa Rica, P.O. Box 1031-7050 Cartago, Costa Rica, A.C. POSTMASTER: Send address changes to Jardin Botanico Lankester, Universidad de Costa Rica, P.O. Box 1031-7050 Cartago, Costa Rica, A.C. EDITORIAL OFFICE: Jardin Botanico Lankester, Universidad de Costa Rica, P.O. Box 1031-7050 Cartago, Costa Rica, A.C. MANUSCRIPTS: Send to Editorial Office INFORMATION FOR CONTRIBUTORS: Send request to Editorial Office. MEMBERSHIP OFFICE: Jardin Botanico Lankester, Universidad de Costa Rica, P.O. Box 1031-7050 Cartago, Costa Rica, A.C. SUBSCRIPTION RATES: $ 4.00 per issue CR, $ 6.00 elsewhere. SUBSCRIPTION TERM: Calendar year only, including three copies. Differences in issue number will be compensated with next year subscription. REMITTANCES: All checks and money orders must be payable through a Costa Rica bank in U.S. dollars or Colones. Pay toJardin Botanico Lankester, Fundevi. BACK ISSUES: Single issues are availbale for sale, single copies at $ 6.00 (CR) and $ 8.00 (elsewhere). Send inquiries to Jardin Botanico Lankester, Universidad de Costa Rica, P.O. Box 1031-7050 Cartago, Costa Rica, A.C. CHANGES OF ADDRESS: Send mailing label or complete old address and new address to Membership Office. CLAIMS: Copies lost in mails must be claimed at the Membership Office within 90 days from issue date. After 90 days, the single-issue price will be charged for replacement. REPRINTS: No free copies supplied. Price quotations and order blanks will be sent with galley proofs. Send orders, inquiries, and payment for reprints to Membership Office, Jardin Botanico Lankester, Universidad de Costa Rica, P.O. Box 1031-7050 Cartago, Costa Rica, A.C.