FIELDIANA: BOTANY A Continuation of the BOTANICAL SERIES of FIELD MUSEUM OF NATURAL HISTORY VOLUME 32 FIELD MUSEUM OF NATURAL HISTORY CHICAGO, U.S.A. TABLE OF CONTENTS 1. A New Guatemalan Spigelia. By Dorothy N. Gibson 1 2. Three New Nicaraguan Epidendrums. By Alfonso H. Heller 7 3. Syagrus oleracea ( Mart. ) Becc. and Closely Related Taxa. By S. F. Classman 13 4. Tropical American Plants, X. By Louis O. Williams 35 5. Two New Guatemalan Tournefortias. By Dorothy N. Gibson 65 6. A New Member of Morganella. By Patrick) Ponce de Leon 69 7. A New Odontoglossum from Nicaragua. By Alfonso H. Heller 73 8. Studies in the Palm Genus Syagrus Mart. II. By S. F. Glassman 77 9. Revision of the Genus Vascellum ( Lycoperdaceae ) . By Patrick) Ponce de Leon 109 10. A Conspectus of the Palm Genus Butia Becc. By S. F. Glassman 127 11. Studies in American Plants, II. By Dorothy N. Gibson 173 12. Tropical American Plants, XI. By Louis O. Williams 179 13. The Juglandaceae of Guatemala. By Louis O. Williams and Antonio Molina R 207 14. An Overlooked Genus of the Scrophulariaceae. By Louis O. Williams 211 15. A Synopsis of the Palm Genus Syagrus Mart. By S. F. Glassman 215 16. A New Hybrid in the Palm Genus Syagrus Mart. By S. F. Glassman 241 Vic "> - 0 TWO NEW GUATEMALAN TOURNEFORTIAS DOROTHY N. GIBSON A NEW MEMBER OF MORGANELLA PATRICIO PONCE DE LEON A NEW ODONTOGLOSSUM FROM NICARAGUA ALFONSO H. HELLER STUDIES IN THE PALM GENUS SYAGRUS MART. II S. F. CLASSMAN BIOLOGY U8RAM 101 BURRILL The Library of the JAN 1 8 1979 91979 _,__,,^ FIELDIANA: BOTANY VOLUME 32, NUMBERS 5, 6, 7, 8 Published by FIELD MUSEUM OF NATURAL HISTORY AUGUST 11, 1969 TWO NEW GUATEMALAN TOURNEFORTIAS DOROTHY N. GIBSON Supervisor of the Herbarium Field Museum of Natural History A NEW MEMBER OF MORGANELLA PATRICIO PONCE DE LEON Assistant Curator, Cryptogamic Herbarium Field Museum of Natural History A NEW ODONTOGLOSSUM FROM NICARAGUA ALFONSO H. HELLER Associate, Field Museum of Natural History STUDIES IN THE PALM GENUS SYAGRUS MART. II S. F. CLASSMAN Research Associate, Palms Field Museum of Natural History and University of Illinois, Chicago Circle FIELDIANA: BOTANY VOLUME 32, NUMBERS 5, 6, 7, 8 Published by FIELD MUSEUM OF NATURAL HISTORY AUGUST 11, 1969 Printed with the Assistance of The Frederick R. and Abby K. Babcock Fund PRINTED IN THE UNITED STATES OF AMERICA BY FIELD MUSEUM PRESS CONTENTS Two New Guatemalan Tournefortias by Dorothy N. Gibson 65 A New Member of Morganella by Patricio Ponce de Leon 69 A New Odonloglossum from Nicaragua by Alfonso H. Heller 71 Studies in the Palm Genus Syagrus Mart. II by S. F. Glassman 75 FIELDIANA . BOTANY Volume 32, No. 7 August 11, 1969 Publication 1072 A New Odontoglossum from Nicaragua ALFONSO H. HELLER ASSOCIATE, FIELD MUSEUM OF NATURAL HISTORY The genus Odontoglossum is not a large one in Central America and in Nicaragua. I have recorded only two other species, 0. krameri Reichb. f. and 0. oerstedii Reichb. f. Other species are to be expected here as exploration continues. Odontoglossum subcruciforme Heller Herbae epiphyticae. Pseudobulbi ovati, compresati, bi- (uni-?)- foliati; folia ligulata, emarginata, obtusa, subcoriacea, basi conduplicati et leviter angustati; inflorescentia racema pauciflora e basi pseudobulbi; flores pedicellati; sepalum dorsale oblanceolatum, acutum; sepala lateralia anguste-lanceolata, acuta vel acuminata; petala elliptico-lanceolata acuminata, breviter unguiculata; labellum trilobatum, subcruciforme, lobi laterales rotundati lobus medianus oblongo-ovatus, acutus; columna brevis, erecta, auriculato-dentata. Epiphytic herbs, the pseudobulbs borne proximately on a short rhizome, ovoid, compressed, with two prominent ridges on each side, about 6 cm. long and 3.5 cm. broad, pseudobulbs subtended by a basal sheath and by two unequal cataphylls, the outer one smaller, the inner one to 10 cm. long and similar to a normal leaf; leaves one or two from the apex of the pseudobulbs, ligulate, emar- ginate, obtuse, subcoriaceous, conduplicate and somewhat narrowed to the base, about 15 cm. long and 2.5 cm. broad; inflorescence a few-flowered raceme borne from the base of the pseudobulbs, up to about 45 cm. long, the basal portion with internodes 4-5 cm. long and each with a closely appressed sheath about 1 cm. long; flowers pedicellate, about seven, the pedicels slender, about 2 cm. long, subtending bracts cucullate, ovate, about 4 mm. long; dorsal sepal oblanceolate, acute, about 1.6 cm. long and 0.5 mm. broad; lateral sepals narrowly lanceolate, acute or acuminate, slightly contracted to a claw-like base, about 2.2 cm. long and 0.4-0.5 cm. broad; petals obliquely elliptic-lanceolate, acuminate, short ungui- culate at the base, about 1.6 cm. long and 0.5-0.6 cm. broad; lip trilobate, some- what cruciform, about 1.8 cm. long and 1.2 mm. broad across the lateral lobes, the two prominent auriculate lateral lobes below the middle, rounded, the mid-lobe oblong-ovate, acute, about 9 mm. long and 7 mm. broad, disc with a rounded, sulcate, pubescent callus on the claw of the lip, provided with a pair of central keels each with a lateral horn-like process on the outer side, the callus about 1 cm. long; column short, stout, erect, auriculate-dentate on each side opposite base of stigma; ovary elongating in fruit. Library of Congress Catalog Card Number: 75-92^74 73 74 HELLER: NEW ODONTOGLOSSUM 75 Nicaragua: epiphyte, flowers brown maculate, Yali, Dept. Jino- tega, alt. 1,100 m., Feb. 1968, flowered in cultivation May 1968, Heller 11305 (type,1/). This species has the habit of Odontoglossum stenoglossum (Schltr.) L. Wms. and 0. pauciflorum L. Wms., but the structure of the flowers more nearly resembles that of 0. schlieperianum Reichb. f. and the coloring that of 0. maculatum Llave & Lex. The illustration was prepared in Nicaragua from living material, the enlarged flower and lip drawn by Miss Davida Simon from preserved materials. FIG. 1. Odontoglossum subcruciforme. A, habit, X 1A; B, flower with labellum pulled downward, X 2; C, labellum, X 3; D, column and lip from side, X 2;E, pollinia, much enlarged. Publications 1071, 1072, 1073, and 1074