| # | Title | Journal | Year | Citations |
|---|
| 1 | Molecular Diversity of Microcystis Strains (Cyanophyceae, Chroococcales) Based on 16S rDNA Sequences | Systematics and Geography of Plants | 2000 | 102 |
| 2 | Succession and Regeneration Patterns of East African Mountain Forests. A Review | Systematics and Geography of Plants | 2001 | 75 |
| 3 | Diatomees invasives exotiques ou rares en France: Principales Observations effectuees au cours des dernieres decennies | Systematics and Geography of Plants | 2000 | 73 |
| 4 | The Phytogeography and Flora of Western Cameroon and the Cross River-Sanaga River Interval | Systematics and Geography of Plants | 2001 | 54 |
| 5 | Myxocarpy in the Nepetoideae (Lamiaceae) with Notes on Myxodiaspory in General | Systematics and Geography of Plants | 2001 | 48 |
| 6 | Tribal Delimitation of Naucleeae (Cinchonoideae, Rubiaceae): Inference from Molecular and Morphological Data | Systematics and Geography of Plants | 2001 | 43 |
| 7 | Tribal Relationships in Caprifoliaceae: Evidence from a Cladistic Analysis Using ndhF Sequences | Systematics and Geography of Plants | 1999 | 41 |
| 8 | Patterns of African Vascular Plant Diversity: A GIS Based Analysis | Systematics and Geography of Plants | 2001 | 39 |
| 9 | The Effect of Nutrient and Water Availability on Nectar Secretion and Nectary Structure of the Dominant Labiatae Species of Phrygana | Systematics and Geography of Plants | 1999 | 37 |
| 10 | Inflorescence Morphology and the Systematics of Aristolochiaceae | Systematics and Geography of Plants | 1999 | 37 |
| 11 | Cosmopolitan Chrysophytes | Systematics and Geography of Plants | 2000 | 37 |
| 12 | Microrefugia, Small Scale Ice Age Forest Remnants | Systematics and Geography of Plants | 2001 | 32 |
| 13 | Phylogenetic Studies in Streptocarpus (Gesneriaceae): Reconstruction of Biogeographic History and Distribution Patterns | Systematics and Geography of Plants | 2001 | 32 |
| 14 | Cape Elements on High-Altitude Corridors and Edaphic Islands: Historical Aspects and Preliminary Phytogeography | Systematics and Geography of Plants | 2001 | 31 |
| 15 | Margaritopsis (Rubiaceae, Psychotrieae) Is a Pantropical Genus | Systematics and Geography of Plants | 2001 | 30 |
| 16 | La destruction catastrophique des forets d'Afrique centrale survenue il y a environ 2500 ans exerce encore une influence majeure sur la repartition actuelle des formations vegetales | Systematics and Geography of Plants | 2001 | 27 |
| 17 | Vulnerabilite des plantes utilisees comme antipaludiques dans l'arrondissement de Mintom au sud de la reserve de biosphere du Dja (Cameroun) | Systematics and Geography of Plants | 2001 | 25 |
| 18 | Physiological Aspects and Experimental Reversion of Flowering in Fargesia murieliae (Poaceae, Bambusoideae) | Systematics and Geography of Plants | 1999 | 22 |
| 19 | Small-Scale Variations in Species Composition of Miombo Woodland in Sengwa, Zimbabwe: The Influence of Edaphic Factors, Fire and Elephant Herbivory | Systematics and Geography of Plants | 2001 | 21 |
| 20 | Utilisations traditionnelles de Garcinia lucida et Garcinia kola (Clusiaceae) au Cameroun | Systematics and Geography of Plants | 2001 | 21 |
| 21 | Flower and Fruit Development in the Genus Phacelia (Phacelieae, Hydrophyllaceae): Characters of Systematic Value | Systematics and Geography of Plants | 1999 | 19 |
| 22 | On the Identity of Navicula (Frustulia) Rhomboides and Frustulia saxonica (Bacillariophyceae) | Systematics and Geography of Plants | 2000 | 19 |
| 23 | Floral Development of Galopina tomentosa with a Discussion of Sympetaly and Placentation in the Rubiaceae | Systematics and Geography of Plants | 2000 | 18 |
| 24 | Generic Relationships and Character Evolution in Cyperus s.l. (Cyperaceae) | Systematics and Geography of Plants | 2001 | 18 |
| 25 | Connaissances ethnomycologiques des peuples Nagot du centre du Benin (Afrique de l'Ouest) | Systematics and Geography of Plants | 2001 | 18 |
| 26 | What Do We Really Know about the Afromontane Archipelago? | Systematics and Geography of Plants | 2001 | 18 |
| 27 | Functional Impact of the Vascular Architecture of Flowers in Annonaceae and Magnoliaceae, and Its Bearing on the Interpretation of the Magnoliaceous Gynoecium | Systematics and Geography of Plants | 1999 | 15 |
| 28 | Les Micro-algues de deux cours d'eau (Bia et Agnebi) de Cote d'Ivoire | Systematics and Geography of Plants | 2000 | 15 |
| 29 | Generic Delimitation of Hyacinthaceae, with Special Emphasis on Sub-Saharan Genera | Systematics and Geography of Plants | 2001 | 15 |
| 30 | In Vitro Germination of Several South African Summer Rainfall Disa (Orchidaceae) Species: Is Seed Testa Structure a Function of Habitat and a Determinant of Germinability? | Systematics and Geography of Plants | 2001 | 15 |
| 31 | Diversite, affinites phytogeographiques et origines presumees de la flore de Mayotte (Archipel des Comores) | Systematics and Geography of Plants | 2001 | 15 |
| 32 | The Epiphytic Diatom Assemblages from Terrestrial Mosses in Zackenberg (Northeast Greenland) | Systematics and Geography of Plants | 2000 | 14 |
| 33 | A High Elevation Ancestry for the Usambara Mountains and Lowland Populations of African Violets (Saintpaulia, Gesneriaceae) | Systematics and Geography of Plants | 2001 | 14 |
| 34 | Diversite et productivite des champignons comestibles de la foret classee de Wari-Maro (Benin, Afrique de l'Ouest) | Systematics and Geography of Plants | 2001 | 14 |
| 35 | Historical Distribution of 'Red List Diatoms' (Bacillariophyceae) in Flanders (Belgium) | Systematics and Geography of Plants | 2000 | 13 |
| 36 | Symbiotic Seed Germination in Twelve Kenyan Orchid Species | Systematics and Geography of Plants | 2001 | 13 |
| 37 | Premieres etudes sur la diversite vegetale des inselbergs de Guinee Equatoriale continentale | Systematics and Geography of Plants | 2001 | 13 |
| 38 | Domestication of Gnetum africanum and G. buchholzianum (Gnetaceae), Over-Exploited Wild Forest Vegetables of the Central African Region | Systematics and Geography of Plants | 2001 | 13 |
| 39 | Studies in Perenniporia (Basidiomycetes, Polypores): African Taxa I. Perenniporia dendrohyphidia and Perenniporia subdendrohyphidia | Systematics and Geography of Plants | 2001 | 12 |
| 40 | A New Species of Coffea (Rubiaceae) from Central Africa, with Notes on Tentative Other Taxa | Systematics and Geography of Plants | 1999 | 11 |
| 41 | Actinella comperei (Eunotiophycidae, Bacillariophyta): A New Endemic Freshwater Diatom from Tasmania (Australia) | Systematics and Geography of Plants | 2000 | 11 |
| 42 | The Taxonomic Value of Bacterial Symbiont Identification in African Psychotria (Rubiaceae) | Systematics and Geography of Plants | 2001 | 11 |
| 43 | Reinstatement of the Afro-Malagasy Genus Coptosperma (Rubiaceae, Ixoroideae, Pavetteae) | Systematics and Geography of Plants | 2001 | 10 |
| 44 | The Synonymy of Schickendantzia with Alstroemeria (Alstroemeriaceae) | Systematics and Geography of Plants | 1999 | 9 |
| 45 | Floral Ontogeny of Anacampseros subg. Anacampseros sect. Anacampseros (Portulacaceae) | Systematics and Geography of Plants | 1999 | 9 |
| 46 | A Revision of the Viorna Group of Species (Section Viorna sensu Prantl) in the Genus Clematis (Ranunculaceae) | Systematics and Geography of Plants | 1999 | 9 |
| 47 | Quatre nouveaux taxons d'Orchidaceae des genres Liparis, Bulbophyllum, Polystachya et Calanthe decouverts a Sao Tome et Principe | Systematics and Geography of Plants | 2000 | 9 |
| 48 | The Occurrence of Long, Narrow Corolla Tubes in Southern African Lamiaceae | Systematics and Geography of Plants | 2001 | 9 |
| 49 | Distribution des epiphytes vasculaires sur les haies vives dans la region de Bafou (Cameroun) | Systematics and Geography of Plants | 2001 | 9 |
| 50 | Application du SIG IVOIRE a la distribution potentielle des especes en fonction des facteurs ecologiques | Systematics and Geography of Plants | 2001 | 9 |
