Les graminées sont assez difficiles à identifier sur le terrain et certains genres, comme Eragrostis, comptent de nombreuses espèces difficiles à distinguer. Ce livre fournit des informations pratiques qui faciliteront la reconnaissance de ces espèces. Destiné aux botanistes, écologues, agronomes, gestionnaires de la nature, étudiants et techniciens, il servira aussi de référence aux éleveurs impliqués dans la gestion de la faune sauvage. Enfin, il contribue à la connaissance de la biodiversité végétale des écosystèmes d'Afrique tropicale.Table of contents: Preface. Thanks. Principal abbreviations used. Part I - Introduction. Ecology: Increaser and pioneer species; Tolerance to drought; Tolerance to salt; Tolerance to fire. Erosion control. Biological control. Economic importance of Eragrosis species: Food; Traditional medicine; Traditional crafts; Thatching; Lawns; Fodder. Part II - Phytogeography of Zimbabwe. Forests: Dry forests; Moist forests. Woodlands: Miombo woodland; Mopane woodland; Teak woodland; Terminalia/Combretum woodlands; Acacia woodlands. Grasslands. Part III - How to identify an Eragrosti : Poaceae; Eragrostis stapf; Eragrostis Wolf. Vegetative parts: Root system; Culms; Leaves. Reproductive parts: Inflorescence; Spikelet; Seed or caryopsis. Part IV - Description of Eragrostis species of Zimbabwe. Key to groups. Key to species. Group 1: Eragrostis paradoxa. Group 2: Eragrostis mollior; Eragrostis hispida. Group 3: Eragrostis lappula; Eragrostis hierniana; Eragrostis castellaneana; Eragrostis glischra; Eragrostis ciliaris; Eragrostis viscosa; Eragrostis amabilis; Eragrostis arenicola. Group 4: Eragrostis plana; Eragrostis latifolia; Eragrostis heteromera; Eragrostis planiculmis; Eragrostis bicolor; Eragrostis tenuifolia; Eragrostis saresberiensis; Group 5: Eragrostis superba. Group 6: Eragrostis caniflora; Eragrostis japonica; Eragrostis gummiflua; Eragrostis pallens; Eragrostis nindensis; Eragrostis echinochloidea; Eragrostis aspera; Eragrostis rog