196 THE FLORA OF SINGAPORE - 



S. sp. Small plant, Bukit Timah, No. G547. 



Psilotum flaccidum Wall. On trees in mangrove swamps, Kranji 



P complanatum Sw. Mangroves, Sungei Mora', Kranji. 



Rhizocarpeae. 



Azo'la pinnata R. Br. A small floating plant. Ditches, common, 

 Tanglin, Ang Mo Kio, Galang. 



Addenda. 



Lvdiuiji i parvifiova Roxb. Ditch js, Tanglin. 



Enhydrias anrjustipetala Ridl. Common in ponds an 1 ditches, 

 Tanglin. This new genus must be put in place of HydrUla 

 verticil lata, for which it was mistaken. 



