166 



NOTES ON DIPTEROCARPS. 



All of these Shoreas, e.g. 8 . leprosula, S. rigida, S. macro p- 

 tera, and S. bracteolata, have epigeal cotyledons with short petioles; 

 but the Indian 8. robusta, Roxb., differs greatly from them in 

 having cotyledons capable of being hypogeal, with greatly elongat- 

 ing petioles, in which characters it approaches Diptero carpus. 



In the Botanic Gardens, Singapore, where S. macro ptera is 

 particularly abundant, many abnormal seedlings appeared in 1916. 

 Some of these had three cotyledons, followed by three leaves in a 

 whorl: some had three cotyledons followed by what may be called 

 two and a half leaves (fig. 15) or by three and a half leaves 

 (figure 16) ; and sometimes abnormally split leaves would follow 

 the normal number of cotyledons (fig. 17). Notice was particular- 

 ly taken of these in the wish to ascertain how Anisoptera (see this 

 Journal p. 44) has a whorl of four leaves following the cotyledons. 



Fig. 14. 



Fig. 16. 



Fig. 15 



