84 
INTRODUCTION. 
nifolia, 1200-3500; D. purpurascens, 800-1100; D. ferruginea, 
1800-8500; D. pygmea, 1300; D. ophrydea, 1400-2500 ; 
D. affinis, 1400-2500; D. reticulata, 2000-2800; D. torta, 
2000; D. inflexa, 2500-3550; D. obliqua, 1000-2300 ; 
D. clavigera (height not recorded). 
Disperis paludosa, —2500. 
Corycium bifidum (height not recorded). 
Pterygodium platypetalum, 1800; P. acutifolium, 1400-3500; 
P. carnosum, 1800-8550. 
Ceratandra bicolor, 1800-2400; C. Harveiana, 2400; C. globosa, 
3000 ; C. parviflora (height not recorded), 
Total, 59 species. 
II1.—Species which are found growing above, and also below, an elevation 
of 500 feet. 
Liparis Capensis, 50-2500. 
Kulophia lamellata, 50-1400. 
Bartholina Ethele, 150-1000. 
Holothrix squamulosa, 50-2500; H. villosa, 50-2400. 
Satyrium carneum, 100-800; §. candidum, 50-2400; S. bicorne, 
50-2500; S. coriifolium, 50-700; S. odorum, 50-2500. 
Disa cornuta, 50-8550 ; D. tenella (height not recorded) ; D. tenuis, 
100-1400; D. multiflora, 100-600; D. micrantha, 50-3550 ; 
D. rufescens, 100-8300. 
Disperis capensis, 50-8500; D. cucullata, 200-800; D. villosa, 
50-600. 
Corycium excisum, 50-800. 
Pterygodium catholicum, 50-800; P. caffrum, 200-800. 
Ceratandra chloroleuca, 50-8500. 
Total, 23 species. 
From the foregoing it will be seen that certain species have a very 
considerable vertical range; fifteen enjoying a range of from 2000 to 
3000 feet, and six species a range of more than 3000 feet. This 
peculiarity is shared in common with many other flowering-plants on 
the same spot, and is doubtless due to the equability of the temperature 
and of the moisture of the atmosphere of the Peninsula at different 
elevations, owing to its close proximity on nearly every side to the sea. 
It stands in marked contrast to the results of differences of elevation 
on the mountains a short distance inland. 
VII.—Cotour anp Opour oF THE FLOWERS. 
The colours of the flowers of Orchids play an important part, as is 
well known, in the economy of their fertilisation. Blue and red 
