CONTENTS. 
I. — History of the Botanical Exploration of Aden, 
II.— Physical Aspects of Aden. 
1. Area and Position. 
2. Geology. 
3. Topography. 
4. Conditions of Plant-Life. 
(a) Soil. 
(5) Rain. 
(c) Humidity and Temperature » 
III. — The Vegetation. 
1. Statistical account. 
2. General aspects. 
(a) Peninsula of Aden. 
(5) Little Aden. 
3. Adaptation. 
4. Flowering season and climates 
5. Plants and Animals. 
6. Colour of Flowers. 
7. Geographical Relations. 
8. Origin. 
9. Means of dissemination. 
(a) Wind. 
(b) Water. 
(c) Animals. 
(d) Man. 
(e) Mechanical Propulsion. 
10. Gardening and Cultivation. 
IV. — Systematical Part. 
1. Synopsis of orders. 
2. Description of species. 
V.— Bibliograyph . 
Index. 
