TO LOWER SIAM. 



59 



Kayea 

 Eurya 

 Archytaca! 



Shorea 



Hopea 



Anisoptcra 



Durioriece 



Tarrietia 



PentacB 



Commersonia 



Coptosapclta 



Gr&jiia! ' 



Lucinea 



Urophyllum 



Adenosacmc ! 



Morinda 



Lasianthus 



Hydnophytum! 



Pentaphragma ! 



Sty rax 



Leuconotis ! 



Dyer a ! 



Urceola 



Parameria 



Epigynum ! 



Didissandra ! 



Platyclinis 

 Tylostylis! 

 Ceratostylis 

 Plocoglottis ! 

 Di podium ! 

 Benanthera 

 Oxyanthera! 

 Aphyllorchis 

 Vrydagzynca 

 Cystorchis ! 

 Macodes ! 

 Neuiviedia ! 

 Plagiostachys ! 

 Nicolaia ! 

 Lowia ! 

 Nenga ! 

 Iguanura ! 

 Cyrtostachys ! 

 Drymophlocus ! 

 Ceratolobas ! 

 Eiigeissona ! 

 Homalomena 

 Schismatoglottis 

 Cyrtospcrma ! 

 Lipocarpha 

 Leptaspis ! 



This list, with the previous one, gives a good idea of the 

 complete change of flora at the boundary line. A few genera 

 from the North have crossed the line into Province Wellesley 

 and down the Pahang coast, and a few Malayan; types have 

 gone north and crossed to Burmah where they are scantily 

 represented, but ~on the whole the two floras are* as distinct 

 as possible. One can gather from the flora that at no great 

 length of time ago the Malay Peninsula was cut off from 

 Burmah south of Kedah, by the sea. There were^ hoyvever, a 

 series of limestone islands lying scattered in the sea not only 

 in this area but along the coasts of the great island, of the 



R. A. Soc, No. 59, I9H. 



