Numéro ou élément de périodique | Mention de date : | Titre |
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| Année 1998
| Opal Phytoliths in Southeast Asian Flora
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| Année 1997
| Genera of New World Eragrostideae (Poaceae : Chloridoideae)
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| Année 1997
| A Contribution to the Guianan Flora: Dalechampia, Haematostemon, Omphalea, Peru, Plukenetia, and Tragia (Euphorbiaceae) with Notes on Subfamily Acalyphoideae
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| Année 1996
| Revision of Pearcea (Gesneriaceae)
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| Année 1993
| A History of Botanical Exploration in Amazonian Ecuador, 1739-1988
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| Année 1993
| Flora of Micronesia, 5 : Bignoniaceae-Rubiaceae
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| Année 1992
| Revision of Kohleria (Gesneriaceae)
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| Année 1991
| A Taxonomic Revision of the Moss Families Hookeriaceae and Hypopterygiaceae in Malaya
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| Année 1991
| Flora of Dominica, Part 2 : Dicotyledoneae
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| Année 1991
| The Morphology and Taxonomy of Aneilema R. Brown (Commelinaceae)
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| Année 1990
| Vascular System of the Male and Female Florets of Raddia brasiliensis (Poaceae; Bambusoideae : Olyreae)
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| Année 1990
| A Synopsis of the Lichen Genus Xanthoparmelia (Vainio) Hale (Ascomycotina, Parmeliaceae)
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| Année 1990
| A Review of Philippine Hookeriaceous Taxa (Musci)
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| Année 1989
| A Revision of the Genus Glyra the New Segregate Genus Parodiolyra (Poaceae: Bambusoideae : Olyreae)
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| Année 1989
| Morphological, Anatomical, and Taxonomic Studies in Anomochloa and Streptochaeta (Poaceae: Bambusoideae)
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| Année 1987
| A Monograph of the Lichen Genus Parmelia Acharius sensu stricto (Ascomycotina : Parmeliaceae)
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| Année 1986
| Atlas of Hairs for Neotropical Melastomataceae
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| Année 1986
| A Phylogenetic Analysis of the Orchidaceae
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| Année 1985
| Classification of the Outlying Species of New World Panicum (Poaceae : Paniceae)
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| Année 1984
| Revision of the South American Genus Otachyrium (Poaceae : Panicoideae)
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| Année 1984
| History of Botanical Exploration in Territorio Federal Amazonas, Venezuela
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| Année 1983
| A Generic Review of the Tribe Liabeae (Asteraceae)
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| Année 1981
| Chromosome Numbers in Compositae, XII : Heliantheae
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| Année 1981
| Pollen Morphology and Phylogenetic Relationships of the Berberidaceae
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| Année 1981
| A Revision of the Tribal and Subtribal Limits of the Heliantheae (Asteraceae)
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| Année 1981
| Growth and Population Dynamics of Espeletia (Compositae) in the Venezuelan Andes
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| Année 1981
| Polynesian Plant Studies 6-18
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| Année 1980
| Flora of Micronesia, 4 : Caprifoliaceae-Compositae
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| Année 1980
| Systematic Studies of Micronesian Plants
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| Année 1979
| A Revision of the Genus Polylepis (Rosaceae; Sanguisorbeae)
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| Année 1979
| A Study of the Genus Schistocarpha (Heliantheae: Asteraceae)
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| Année 1978
| Revision of the Genus Psyllocarpus (Rubiaceae)
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| Année 1977
| A Revision of the Lichen Family Thelotremataceae in Panama
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| Année 1977
| Pollen Morphology and the Relationship of the Plumbaginaceae, Polygonaceae, and Primulaceae to the Order Gentrospermae
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| Année 1976
| Flora of Micronesia, 3 : Convolvulaceae
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| Année 1976
| The Genus Colpomenia Derbes et Sober (Phaeophyta) in the Gulf of California
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| Année 1976
| New Records of Marine Algae from the 1974 R /V Dolphin Cruise to the Gulf of California
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| Année 1976
| A Monograph of the Lichen Genus Parmelina Hale (Parmeliaceae)
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| Année 1976
| A Monograph of the Lichen Genus Bulbothrix Hale (Parmeliaceae)
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| Année 1976
| A Monograph of the Lichen Genus Pseudoparmelia Lynge (Parmeliaceae)
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| Année 1976
| A Revision of American Velloziaceae
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| Année 1976
| A Study of the Tribe Gesnerieae, with a Revision of Gesneria (Gesneriaceae: Gesnerioideae)
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| Année 1975
| A Monograph of the Genus Eperua (Leguminosae: Caesalpinioideae)
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| Année 1975
| The Mosses of Juan Fernandez Islands
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| Année 1975
| A Monograph of the Lichen Genus Relicina (Parmeliaceae)
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| Année 1975
| A Revision of the Lichen Genus Hypotrachyna (Parmeliaceae) in Tropical America
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| Année 1975
| Flora of Micronesia, 2 : Casuarinaceae, Piperaceae, and Myricaceae
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| Année 1975
| Flora of the Marquesas, 1 : Ericaceae-Convolvulacae
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| Année 1975
| Vascular Flora of the Northern Marianas Islands
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| Année 1975
| Polynesian Plant Studies 1-5
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