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Evolution, Cytology and Subgeneric Classification in Moraea (Iridaceae)
Vol 63, Page 1
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Evolution of the Santa Lucia Fir (Abies bracteata) Ecosystem
Vol 63, Page 24
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Studies in Bignoniaceae 18: Notes on S. Moore's Mato Grosso Bignoniaceae
Vol 63, Page 42
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Studies in Bignoniaceae 19: Generic Mergers and New Species of South American Bignoniaceae
Vol 63, Page 46
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Inflorescence Units in the Cyperaceae
Vol 63, Page 81
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The Morphology of Some Critical Brazilian Species of Cyperaceae
Vol 63, Page 113
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Cytotaxonomic Studies in the Tribe Quillajeae (Rosaceae)
Vol 63, Page 200
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Chromosome Number in Gomortega keule
Vol 63, Page 207
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The Unit of Genetic Change in Adaptation and Speciation
Vol 63, Page 210
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The Nature of Limits to Natural Selection
Vol 63, Page 224
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Enzyme Polymorphism and Adaptation in Alpine Butterflies
Vol 63, Page 248
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On the Relative Advantages of Cross-and Self-Fertilization
Vol 63, Page 262
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Intraspecific Variation in Pollen-Ovule Ratios and Nectar Secretion- Preliminary Evidence of Ecotypic Adaptation
Vol 63, Page 277
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On Selective Pressures and Energy Allocation in Populations of Ranunculus repens L., R. bulbosus L. and R. acris L
Vol 63, Page 290
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Barnardiella: A New Genus of the Iridaceae and Its Relationship to Gynandriris and Moraea
Vol 63, Page 309
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Chromosome Cytology of Hessea, Strumaria, and Carpolyza (Amaryllidaceae)
Vol 63, Page 314
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Chromosome Cytology, Pollen Structure, and Relationship of Retzia capensis
Vol 63, Page 321
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Generic and Sectional Delimitation in Onagraceae, Tribe Epilobieae
Vol 63, Page 326
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Additional Panamanian Passifloraceae
Vol 63, Page 341
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The Panamanian Species of Bauhinia (Leguminosae)
Vol 63, Page 346
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Notes on Central and South American Cissus (Vitaceae)
Vol 63, Page 358
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New Names and Taxa in the Solanaceae
Vol 63, Page 363
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A New Panamanian Sterculia with Taxonomic Notes on the Genus
Vol 63, Page 370
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Rhynchostegiopsis carolae (Musci, Hookeriaceae): A New Species from Costa Rica
Vol 63, Page 373
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A New Gypsophilous Species of Gaillardia (Asteraceae) from Chihuahua, Mexico
Vol 63, Page 375
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Chromosome Counts in Solanum
Vol 63, Page 377
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A New Species of Chamaesyce (Euphorbiaceae) from the Bahamas
Vol 63, Page 378
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Chromosome Counts in Grielum and Cercis
Vol 63, Page 379
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Nomenclatural Changes in Alnus (Betulaceae)
Vol 63, Page 380
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An Earlier Name for Oenothera strigosa (Onagraceae)
Vol 63, Page 382
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Specific Status for Camissonia claviformis Subsp. wigginsii (Onagraceae)
Vol 63, Page 383
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The Genus Moraea in the Winter Rainfall Region of Southern Africa
Vol 63, Page 657
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Studies in Neotropical Paleobotany. II. The Miocene Communities of Veracruz, Mexico
Vol 63, Page 787
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Origin of the Creosote Bush (Larrea) Deserts of Southwestern North America
Vol 63, Page 843
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Chromosome Numbers in Compositae. XIII. Eupatorieae
Vol 63, Page 862
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New or Noteworthy Chromosome Records in the Angiosperms
Vol 63, Page 889