388 



D. Prain — The Vegetation of the Goco Grotip. 



No. 4, 



than in many places, for though the south-west monsoon, which blows for 

 half the year, sweeps only over a wide expanse of sea before it reaches 

 the islands, there is a very distinct and tolerably powerful north-east 

 monsoon which, during a considerable part of the remaining half-year, 

 blows from the direction of the adjacent Burmese coast. 



It is, however, easy to overrate the effect of this agency and however 

 well adapted certain f rints, such as those of the two Bipterocarpi, Terminalia 

 hialata, Pterocarpus indimis, Sterculia companulata, Forana spectabilis, 

 IlUgera conyzadenia, Ventilago calyculata, or seeds, such as those of 

 Sterculia alata, Gloriosa superha, ArlstolocUa tagala, may at first sight 

 appear to be for transmission by wind, it seems very doubtful on further 

 consideration if any of those mentioned could possibly be carried so far 

 as from the nearest mainland to these islands. In most of these cases the 

 wings of the fruits or seeds can only, as in that of Gyrocarpus, assist 

 in local dispei'sal. Regard must be paid, too, to the usual situation of 

 the species, and in the case of Orchids, for example, the seeds of 

 which are light, and well adapted for carriage in this way, it is doubtful 

 if Galanthe veratrifolia, which is always found in densely shady places, 

 could have been brought in this way. Similarly among the inland 

 Cryptogams, for all of which except Chara this means of dispersal is 

 doubtless possible, it seems more pi'obable that Acrostichum appendi- 

 culatxim, which affects the same localities as Galanthe, and Geratopteris 

 thalictr aides, which undoubtedly is sometimes, if not always, bird- 

 introduced, ought to be excluded from this list. 



The table below gives the whole of the possibly " wind-introduced " 

 species present in the gi^oup. 



Table XVII. DistriMdion of Wind-mirodnced "inland" species 



present in the Goco Group. 







S. E 



. Asia. 































'6 



Species. 







i 





cS 



=e 





i 











'a 



• 



a 





c3 



tS 



1— I 





c3 

 o 



< 



I— 1 



a 

 i— 1 





c3 

 u 



03 



< 



a 

 'o 



•a 

 « 



s 

 < 



8 



a 



Bombax insigne 



X 



X 



X 









? 





Eriodendron anfractuosum 



X 



X 



X 



X 



_ 



_ 



X 









Dodonasa viscosa ... ... 



X 



X 



X 



X 



X 



X 



X 



_ 



X 



[Vernonia cinerea] 



X 



X 



X 



X 



X 



X 



X 



_ 



_ 



5. Vernonia divergens 



— 



X 



X 



_ 



~ 



__ 



_ 



X 



. 



Bumea virens 



_ 



X 



X 



_ 







_ 



_ 



X 



__ 



[Strophanthus WalHcTiii]... 



- 



- 



[X] 



- 



- 



- 



- 





? 



