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The person charging this material is re-
sponsible for its return to the library from
which it was withdrawn on or before the
Latest Date stamped below.
UNIVEKITY OF ILLINOIS LIUATT AT MtAMA-OiAMPAIGM
L161— O-109*
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FIELDIANA: BOTANY
A Continuation of the
BOTANICAL SERIES
of
FIELD MUSEUM OF NATURAL HISTORY
VOLUME 31
The Library of the
JAN 1 8 1979
FIELD MUSEUM OF NATURAL HISTORY
CHICAGO, U. S. A.
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520.5
-FB
y.3i
TABLE OF CONTENTS
PAGE
1. Two New Species of Palms from Nicaragua. By S. F. Glassman ... 1
2. Tropical American Plants, VI. By Louis O. Williams 11
3. Agriculture, Tehuacan Valley. By C. Earle Smith, Jr 49
4. Flora, Tehuacan Valley. By C. Earle Smith, Jr 101
5. Preliminary Studies in the Palm Genus Syagrus Mart, and Its Allies.
By S. F. Glassman 145
6. Tropical American Plants, VII. By Louis O. Williams 165
7. Supplement to Orchids of Guatemala. By Donovan S. Correll .... 175
8. Preliminary Notes on Scrophulariaceae of Peru. By Gabriel Edwin . . 223
9. New Species in the Palm Genus Syagrus Mart. By S. F. Glassman . . 233
10. Tropical American Plants, VIII. By Louis 0. Williams 247
11. Notes on the Flora of Costa Rica, I. By William C. Burger 273
12. A New Eurystyles from Nicaragua. By Alfonso H. Heller 279
13. New Species in the Palm Genus Syagrus Mart. By S. F. Glassman . . 285
14. A Revision of the Family Geastraceae. By Patricio Ponce de Leon . . 303
15. Studies in American Plants. By Dorothy N. Gibson 353
16. Two New Nicaraguan Juglandaceae. By Antonio Molino R 357
17. Studies in the Palm Genus Syagrus Mart. By S. F. Glassman .... 363
18. Tropical American Plants, IX. By Louis O. Williams 401
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NOTES ON THE FLORA OF COSTA RICA, I
WILLIAM C. BURGER
A NEW EURYSTYLES FROM NICARAGUA
ALFONSO H. HELLER
NEW SPECIES IN THE PALM GENUS
SYAGRUS MART., II
S. F. GLASSMAN
A REVISION OF THE FAMILY GEASTRACEAE
PATRICIO PONCE DE LEON
FIELDIANA: BOTANY
VOLUME 31, NUMBERS 11, 12, 13, 14
FIELD MUSEUM OF NATURAL HISTORY
FEBRUARY 22, 1968
i/flittrsity of Illinois
JUL 11 1368
Ml
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A NEW EURYSTYLES FROM
NICARAGUA
ALFONSO H. HELLER
Associate, Field Museum of Natural History
FIELDIANA: BOTANY
VOLUME 31, NUMBER 12
Published by
FIELD MUSEUM OF NATURAL HISTORY
FEBRUARY 22, 1968
PUBLICATION 1037
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Library of Congress Catalog Card Number: 67-31600
PRINTED IN THE UNITED STATES OF AMERICA
BY FIELD MUSEUM PRESS
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A New Eurystyles From Nicaragua
The orchidaceous genus Eurystyles of the "Spiranthinae" is one
of the three genera of this group which Dr. Williams maintained in
his Enumeration of the Orchidaceae of Central America, British Hon-
duras and Panama (1956). In this work and in his previous ones
he took a most conservative view of generic limits in the group.
The generic placement of the present species offers some difficul-
ties for it shows some characters which indicate that it might belong
in Lankesterella — for example, obsolete rostellar processes. However,
the majority of characters point to Eurystyles.
The geographical origin of this species is of interest. It is the most
northern of the half dozen or so species of the genus. Two species are
known from Costa Rica and the remaining ones in the genus are
South American. Although the distance from the habitats of the
known Central American species in Costa Rica is not great, the actual
biological break represented by the low San Juan depression, between
Costa Rica and Nicaragua, is a rather more formidable one than the
actual distance in miles would indicate.
Eurystyles borealis Alfonso H. Heller, sp. nov.
Herbae epiphyticae parvae usque ad 3 cm. altae. Folia elliptica vel obovata,
apiculata, breviter petiolata, in vivo vernicosa; inflorescentia capitata, usque ad
25-flora; sepalum dorsale elliptico-lanceolatum, acutum; sepala lateralia lineari-
lanceolata, acuta, bases subscrotiformae; petala lineari-spathulata, obtusa; label-
lum spathulatum, trilobulatum, basis angustata; rostellum nullum.
Small epiphytic plants to 3 cm. tall. Stems none or very much reduced; roots
white, to 2 cm. long and 3 mm. in diameter, obscurely pubescent on the underside;
leaves basil, elliptic to obovate, apiculate, short petiolate, strikingly vernicose when
living (but not visible in the dried type), margins undulate in living material and
obscurely crenulate, shortly and obscurely ciliate, 15-27 mm. long and 8-16 mm.
broad; inflorescence congested and capitate, borne on a bracteate, pilose pedicel
1-2 cm. long, flowers about 25 or fewer, the head of flowers about 1.5 cm. long and
broad; flowers white, sessile, about 6 mm. long, subtended by ovate, acuminate,
fimbriate- ciliate, pubescent bracts to 1 cm. long and about as broad when spread;
ovary to about 2 mm. long; sepals with echinate pubescence dorsally above the
279
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280
FIELDIANA: BOTANY, VOLUME 31
Front
Side
FIG. 1. Habit and expanded leaf natural size. Flowers and floral dissections
X 10. Drawn from living material by A. H. Heller.
middle, dorsal sepal elliptic-lanceolate, acute, about 3.5 mm. long and 1 mm. broad,
lateral sepals linear-lanceolate, slightly enlarged and obscurely scrotiform at the
base in living material, about 6 mm. long and 1 mm. broad; petals free or lightly
adnate to the lateral sepals, linear-spathulate, obtuse, oblique, about 3.5 mm. long
and 1 mm. broad; lip spathulate, broadest and trilobulate at the apex, narrowed
to a linear claw at the base, obscurely verruculose at the apex; column about 4.5
mm. long, with two porrect teeth below the anther, rostellum obsolete.
NICARAGUA: epiphyte in forest, Cerro Villa Flor, about 2 km.
south of Honduras border, Dept. Nueva Segovia, December 28, 1966,
Heller 10861 (type in Field Museum of Natural History).
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HELLER: NEW EURYSTYLES FROM NICARAGUA 281
Eurystyles borealis differs from the known species of the genus in
lacking a rostellar process. It differs from E. standleyi Ames and
E. auriculata Schltr., the other Central American species, in lacking
basal auricles on the lip. It is the northernmost species of the genus
and the only one north of the San Juan depression.
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Publications 1036, 1037, 1038, and 1039
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UNIVERSITY OF ILLINOIS-URBANA
