TABLE OF CONTENTS

A REVISION OF PHILODENDRON SUBGENUS PHILODENDRON (ARACEAE) OF CENTRAL AMERICA
BY DR. THOMAS B. CROAT

ABSTRACT

INTRODUCTION

MATERIALS AND METHODS

ACKNOWLEDGMENTS

HISTORY OF THE GENUS PHILODENDRON

HEINRICH WILHELM SCHOTT

ADOLF ENGLER

KURT KRAUSE

MODERN WORK

COLLECTING HISTORY

FOSSIL HISTORY

INTRAGENERIC RELATIONSHIP

INFRAGENERIC RELATIONSHIP

KEY TO SUBGENERA OF PHILODENDRON

RELATIONSHIP WITHIN P. SUBGENERA PHILODENDRON

DISCUSSION OF SUBGENERIC CLASSIFICATION

1. P. Sect. Baursia

2. P. Sect. Philopsammos

3. P. Sect. Philodendron

1. P. Subsect. Macrolonchium

2. P. Subsect. Canniphyllium

3. P. Subsect. Platypodium

4. P. Subsect. Psoropodium

5. P. Subsect. Solenosterigma

6. P. Subsect. Philodendron

7. P. Subsect.Achyropodium

4. P. Sect. Calostigma
1. P. Subsect. Macrobelium

2. P. Subsect. Glossophyllum

3. P. Subsect. Oligocarpidium

4. P. Subsect. Bulaoana

5. P. Subsect. Eucardium

5. P. Sect. Tritomophyllum

6. P. Sect. Schizophyllum

7. P. Sect. Polytomium

8. P. Sect. Macrogynium

9. P. Sect. Camptogynium

KEY TO SECTIONS AND SUBSECTIONS OF P. SUBG: PHILODENDRON
KEY TO PHILODENDRON SUBGENUS PHILODENDRON OF CENTRAL AMERICA
KEY 1

KEY 2

KEY 3

KEY 4

MORPHOLOGY OF VEGETATIVE STRUCTURES
ANATOMY
VEGETATIVE ANATOMY

VASCULAR ANATOMY

HABIT AND GROWTH PATTERNS

STEMS

PETIOLAR SCARS

ROOTS

CATAPHYLLS

LEAVES

PETIOLES

BLADES

BLADE SHAPE

POSTERIOR LOBES

SINUS SHAPE

BLADE SIZE

VENATION MIDRIBS

PRIMARY LATERAL VEINS

BASAL VEINS

POSTERIOR RIBS

LESSER ORDER VEINS


MORPHOLOGY OF REPRODUCTIVE STRUCTURES

 
INFLORESCENCES

PEDUNCLES

SPATHES

SPATHE COLOR SPADIX ANDROECIUM POLLEN

GYNOECIUM

OVARY LOCULE NUMBER

OVULES PER LOCULE

OVULE SIZE


OVULE AND FUNICLE MORPHOLOGY

STYLE AND STIGMA MORPHOLOGY

STYLE TYPES

STYLAR CANALS

PLACENTATION

POLLINATION BIOLOGY
BREEDING BEHAVIOR MORPHOLOGY OF FRUITING STRUCTURES INFRUCTESCENCES AND FRUITING BEHAVIOR
BERRIES BERRY COLOR SEEDS
PHENOLOGY A. Flowering in dry-season and wet season

B. Flowering only in wet season

C. Flowering only in dry season

D. Flowering all year

E. Flowering bimodally

CYTOLOGY
GEOGRAPHICAL DISTRIBUTION AND ENDEMISM

ABUNDANCE

TAXONOMIC TREATMENT