132 



WILLIS: THE FtORAS OF 



direction for about half the year. At the changes of the 

 monsoon, in April and October, there is a period of variable 

 winds, but these are usually extremely light. The general 

 result then, so far as carriage of seeds and plants is concerned, 

 will be that these will tend to travel mainly in the north-east- 

 south-west direction, whether carried by wind or by birds. 

 Peaks which lie to the south-east or north-west of the main line 

 will also be in actual fact more isolated than if they lay a 

 similar distance to the north-east or south-west. 



Now, the climatic conditions on most of these hill tops are 

 to all intents and purposes exactly similar, and why, if natural 

 selection is the rule, should we, in Eugenia, for instance, get 

 E. Ferr/usonii in the north-east mountains, a variety of it upon 

 Adam's Peak, E. cyclophylla on Adam's Peak, E. roturuiifolia 

 and E. sclewpliylla above 6,000 feet, E. phillyrceoides on 

 Kalupahanakanda, E. aprica in the north-east mountains, and 

 E. pedunculata on Rangala ? Or again, the genera Hedyotis, 

 Anaphalis, Strobilanthes, Phyllanthus, &c., may be similarly 

 considered. 



With this introduction, we may proceed to give the actual 

 list of endemic species in Ceylon confined to one hill top or 

 small group of mountains : — 



Ranunculiis sagittit'olius 

 Acrotrema lyratum 

 Goniothalamus Thora.soni 

 Calophyllum cordato-oblongum 

 Balanocarpus zeylanicus 

 Stemonoporus afiinis 

 S. reticulatus 

 S. Lewisianus 

 Elseocarpus obovatus 

 E. montanus 

 E. zeylauicus 

 Inapatiens elongatus 

 Oclma rufescens 

 Rliaronus Arnottianus 

 Semecarpus parvifolia 

 Desmodium jucundum 



• 

 Poterium indicum 



* Possibly elsewhere. 



•)• Possibly Hinidum korale, but in any case strictly localized. 



