| A Monograph of the Lichen Genus Parmelia Acharius sensu stricto (Ascomycotina: Parmeliaceae) | 1987/01/01 | English | 6 |
| A Monograph of the Lichen Genus Parmelina Hale (Parmeliaceae) | 1976/01/01 | English | 3 |
| A Revision of the Lichen Genus Hypotrachyna (Parmeliaceae) in Tropical America | 1975/01/01 | English | 2 |
| Catalogue of Seed Plants of the West Indies | 2012/01/01 | English | 2 |
| Systematic Studies of Micronesian Plants | 1980/01/01 | English | 1 |
| Chromosome numbers in the Compositae, XII: Heliantheae | 1981/01/01 | English | 1 |
| Morphological and Anatomical Considerations of the Grass Subfamily Bambusoideae Based on the New Genus Maclurolyra | 1973/01/01 | English | 1 |
| A Monograph of the Lichen Genus Bulbothrix Hale (Parmeliaceae) | 1976/01/01 | English | 1 |
| Pollen morphology and the realtionship of the Plumbaginaceae, Polygonaceae, and Primulaceae to the order Centrospermae | 1976/01/01 | English | 1 |
| A Revision of the Genus Olyra and the New Segregate Genus Parodiolyra (Poaceae: Bambusoideae: Olyreae) | 1989/01/01 | English | 1 |
| A phylogenetic analysis of the Orchidaceae | 1986/01/01 | English | 1 |
| The Silica Bodies of Tropical American Grasses: Morphology, Taxonomy, and Implications for Grass Systematics and Fossil Phytolith Identification | 1998/01/01 | English | 1 |
| Classification, evolution, and phylogeny of the families of monocotyledons | 1989/01/01 | English | 1 |
| A Scanning Electron Microscope Survey of the Epidermis of East African Grasses, II | 1983/01/01 | English | 1 |
| Temperate and Tropical Podocarps: How Ecologically Alike Are They? | 2011/01/01 | English | |
| Podocarp Evolution: A Molecular Phylogenetic Perspective | 2011/01/01 | English | |
| Podocarps in Africa: Temperate Zone Relicts or Rainforest Survivors? | 2011/01/01 | English | |
| Ecology of the Podocarpaceae in Tropical Forests | 2011/01/01 | English | |
| Smithsonian Plant Collections, Guyana: 1995–2004, H. David Clarke | 2011/01/01 | English | |
| Ecology of Fire-Tolerant Podocarps in Temperate Australian Forests | 2011/01/01 | English | |
| Dispersal and Paleoecology of Tropical Podocarps | 2011/01/01 | English | |
| Ecology and Distribution of Neotropical Podocarpaceae | 2011/01/01 | English | |
| Conifer–Angiosperm Interactions: Physiological Ecology and Life History | 2011/01/01 | English | |
| Ecology and Distribution of the Malesian Podocarps | 2011/01/01 | English | |
| Podocarp Roots, Mycorrhizas, and Nodules | 2011/01/01 | English | |
| Podocarpaceae in Tropical Forests: A Synthesis | 2011/01/01 | English | |
| A Functional Analysis of Podocarp Ecology | 2011/01/01 | English | |
| The Ecology of Podocarps in Tropical Montane Forests of Borneo: Distribution, Population Dynamics, and Soil Nutrient Acquisition | 2011/01/01 | English | |
| Flora of the Marquesas, 1: Ericaceae-Convolvulacae | 1975/01/01 | English | |
| Generic and subtribal classification of American Vernonieae | 1999/01/01 | English | |