APPENDIX A 283 



8,000 to 9,000 feet : The slope of the mountains 

 becomes much steeper, and the forest thins out into 

 open spaces covered with bracken and occasional big 

 trees, having very much the appearance of the higher 

 slopes of the New Forest. This gives way to a belt 

 of small tree-heath {Erica arborea) and Podocarpus, and 

 so to the zone of bamboos, which begin on the east 

 side of Ruwenzori at about 8,500 feet, and continue 

 up to 10,000 feet, while on the western slopes of the 

 range they begin at 7,000 feet. 



9,000 to 10,000 feet : The big tree-heaths begin about 

 9,500 feet ; their branches are covered with long wisps 

 of grey lichen. A good many terrestrial orchids 

 were found at this level {Epipactis africana, Cynorchis 

 anacamptoides, Satyrium crassicaule, and Polystachya 

 gracilentd), all endemic species ; while the epiphytic 

 Angrcectmi Scotellii, and two new species oi Polystachya, 

 were also collected. A big bushy Impatiens, the 

 endemic species /. runssoriensis, was found at this 

 altitude. Ferns, notably polypodiums and a long, 

 narrow-leaved hart's-tongue, are numerous, and the 

 biggest of the alchemillas, A. ruwenzoriensis, forms 

 large silvery beds. A Helichrysum (//. argyrocotyle, 

 sp. nov.) in the moist places and a small yellow orchid 

 (Polystachya Doggettii) on the rocks contribute agree- 

 able touches of colour. 



In addition, the following novelties were collected at 

 9,000 feet : Senecio jugicola, Coleiis latidens, Pycnostachys 

 Ellioiii, and a remarkable amaryllidaceous plant which 

 seems to represent a new genus [Choananthus), com- 

 bining in some respects the characters of Hccmanthus 

 and Cyrtanthus. At 10,000 feet were found Thalictrmn 

 rhynocarpum, a species widely spread on the mountains 

 of Tropical and South Africa ; a variety of Cotyledon 

 umbilicus, known also from the mountains of Abyssinia 

 and Kilimanjaro ; several endemic species {Rubus 



