Plants and vegetation of NW Ethiopia a new look at Rodolfo E.G. Pichi Sermolli's results from the "Missione di Studio al Lago Tana", 1937 von Friis, Ib 1945-, Demissew, Sebsebe 1953-, Weber, Odile, Breugel, Paulo van 1971-

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The Rolf and Gertrud Dahlgren Prize for 2017 awarded to Hans Walter Lack von Friis, Ib 1945-

Flora of the Sudan-Uganda border area east of the Nile von Friis, Ib 1945-, Vollesen, Kaj

Skovtrsaefloraen i det nordøstlige tropiske Afrika (Etiopien, Djibouti og Somalia) en sammenfattende redegørelse for tidligere studier = The forest tree flora of Northeast tropical... von Friis, Ib 1945-

A list of botanical collectors in Ethiopia, with information about collecting localities and whereabouts of collections von Friis, Ib 1945-

The two alternative systems of nomenclature proposed and used for orchids by Du Petit-Thouars, with special regard to Corymborkis Thouars von Friis, Ib 1945-, Rasmussen, Finn N.

Flora of the Sudan-Uganda border area east of the Nile von Friis, Ib 1945-, Vollesen, Kaj

Atlas of the potential vegetation of Ethiopia von Friis, Ib 1945-, Demissew, Sebsebe 1953-, Breugel, Paulo van 1971-

Inhaltsverzeichnis

Flora of the Sudan-Uganda border area east of the Nile von Friis, Ib 1945-, Vollesen, Kaj

The New World species of Boehmeria and Pouzolzia (Urticaceae, tribus Boehmerieae) a taxonomic revision von Wilmot-Dear, Christine Melanie 1952-, Friis, Ib 1945-

Skovtraesfloraen i det nordøstlige tropiske Afrika (Etiopien, Djibouti og Somalia) en sammenfattende redegørelse for tidligere studier von Friis, Ib 1945-

Notes on the botanical collections and publications of Pehr Forsskal von Friis, Ib 1945-

Linociera giordanoi (Oleaceae) the correct name for a widespread African species von Friis, Ib 1945-

A field-trip to the forests of Western Kenya April - May 1975 von Friis, Ib 1945-

Dorstenia soerensenii sp. nov. (Moraceae) from sothwestern Ethiopia and related species von Friis, Ib 1945-

A new species of Haemanthus (Amaryllidaceae) from Southwest Ethiopia von Friis, Ib 1945-, Björnstad, Inger N.

The western woodlands of Ethiopia a study of the woody vegetation and flora between the Ethiopian highlands and the lowlands of the Nile Valley in the Sudan and South Sudan von Friis, Ib 1945-

The plants of Pehr Forsskal's "Flora Aegyptiaco-Arabica" collected on the Royal Danish expedition to Egypt and the Yemen ; 1761 - 63 von Hepper, Frank Nigel, Friis, Ib 1945-

Forests and forest trees of Northeast tropical Africa their natural habitats and distribution patterns in Ethiopia, Djibouti and Somalia von Friis, Ib 1945-

Urticaceae von Friis, Ib 1945-