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Evolution and Distribution of Grasses
Vol 68, Page 5
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Some Evolutionary Trends in the Bambusoideae (Poaceae)
Vol 68, Page 15
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Evolution of Reproductive Systems in the Gramineae
Vol 68, Page 48
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Coevolution of Grasses and Herbivores
Vol 68, Page 75
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Grasses and the Culture History of Man
Vol 68, Page 87
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Three New Species of Flourensia (Asteraceae-Heliantheae) From South America
Vol 68, Page 105
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New Species and a New Combination in Palmae, Theaceae, Araliaceae, Apocynaceae, and Bignoniaceae From the Choco and Amazonian Peru
Vol 68, Page 112
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A New Peruvian Styloceras (Buxaceae): Discovery of a Phytogeographical Missing Link
Vol 68, Page 122
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Four New Species of Dioscorea From Amazonian Peru
Vol 68, Page 125
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Systematics, Phylogeny and Evolution of Dietes (Iridaceae)
Vol 68, Page 132
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Additions to the Ericaceae of Panama
Vol 68, Page 154
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Additional Panamanian Species of Burmeistera (Campanulaceae: Lobelioideae)
Vol 68, Page 167
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Sapotaceae of Panama
Vol 68, Page 172
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The Mexican and Central American Species of Adelobotrys (Melastomataceae)
Vol 68, Page 204
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New Taxa From the Uplands of Western Panama
Vol 68, Page 213
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New Species of Connarus (Connaraceae) From Peru
Vol 68, Page 218
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Chromosome Numbers of Miscellaneous Angiosperms
Vol 68, Page 222
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A New Species of Hernandia (Hernandiaceae) From Panama
Vol 68, Page 224
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Pectis Linifolia (Compositae: Tageteae) Added to the Flora of Panama
Vol 68, Page 225
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Setaria Variifolia (Swallen) Davidse, A New Combination (Gramineae: Panicoideae)
Vol 68, Page 226
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Errata: Structural, Behavioral, and Physiological Adaptations of Bees (Apoidea) for Collecting Pollen
Vol 68, Page 231
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Dispersal Versus Gene Flow in Plants
Vol 68, Page 233
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Evolution of Sexual Systems in Flowering Plants
Vol 68, Page 254
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On the Evolution of Complex Life Cycles in Plants: A Review and an Ecological Perspective
Vol 68, Page 275
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Floral Rewards: Alternatives to Pollen and Nectar
Vol 68, Page 301
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Geographical Aspects of Bird-Flower Coevolution, with Particular Reference to Central America
Vol 68, Page 323
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The Distributional Patterns of New World Nectar-Feeding Bats
Vol 68, Page 352
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The Energetics of Pollination
Vol 68, Page 370
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Reproductive Structures and Evolution in Ludwigia (Onagraceae). III. Vasculature, Nectaries, Conclusions
Vol 68, Page 379
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Systematics and Biology of Homeria (Iridaceae)
Vol 68, Page 413
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Nectarivory and Potential Pollination by a Neotropical Marsupial
Vol 68, Page 505
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A Contribution to the Floral Biology and Reproductive System of Couroupita Guianensis Aubl. (Lecythidaceae)
Vol 68, Page 514
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A Preliminary Note on Pollination in the Chenopodiaceae
Vol 68, Page 524
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Studies in Ipomoea (Convolvulaceae) I. The Arborescens Group
Vol 68, Page 527
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Chromosome Cytology of Burniaceae
Vol 68, Page 546
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Chromosome Numbers in Legumes II
Vol 68, Page 551
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A Note on the Rediscovery of Argyrolobium Involucratum (Thunb.) Harv. and the Generic Borderline Between Argyrolobium and Melolobium (Fabaceae- Crotalarieae)
Vol 68, Page 558
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Notes on the Cytology and Distribution of Anapalina, Tritoniopsis, and Sparaxis, Cape Iridaceae
Vol 68, Page 562
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A Revision of Syngonium (Araceae)
Vol 68, Page 565
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Life-Cycle Variation in Geophytes
Vol 68, Page 652
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Haplomitrium Monoicum, A Remarkable New Species of Calobryales (Hepaticae) from New Caledonia, Together with a Reclassification of Subg. Haplomitrium
Vol 68, Page 668
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Two New Species of Bonafousia (Apocynaceae) from Panama and Colombia- Ecuador
Vol 68, Page 677
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Studies in the Capparidaceae XV: Capparis Panamensis, N. SP
Vol 68, Page 681
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On the True Identity of Lagenanthus Parviflorus Ewan (Gentianaceae)
Vol 68, Page 685