FERNS OF THE MALAY PENINSULA. 59 



OPHIOGLOSSACEAE. 



Opitioglossum. 



0. reticulatum L. Penang in dry spots in the waterfall valley 



(Ridley 9837, 11391). Distrib. Eastern Tropics. 

 0. nudicaule L. fil. In grassy spots. Singapore, Bukit Pan- 

 Jang (Ridley 4205), Chan Chu Kang (Ridley 2421). 

 Distrib. Tropics. 



0. pendulum L. Singapore, Tanglin, Bukit Mandai, etc. 

 (Ridley) ; Selangor, Rawang, Camphor Woods (Ridley) ; 

 Pcrak, Gunong Batu Putili (Wray 1133). This plant 

 usually grows on Platyccrium but also on trees. It has 

 a habit of suddenly appearing and spreading widely and 

 then apparently disappearing. At one time the only 

 locality I knew for it was on a tree in the Barracks 

 Grounds. This died and the plant disappeared there, 

 but then appeared in the Botanic Gardens, and spread 

 rapidly. Distrib. Eastern Tropics. 



Helminthostachys. 



Jtl. zeylanica L. In damp muddy spots in open country in 

 thickets. Malacca, Brisu (Derry) ; Pahang, common 

 along the Pahang River, Pekan, Pulau Manis, Pulau 

 Jellam, Kuala Tembcling ; Selangor, near the Batu Caves 

 (Ridley 8152); Perak (Scortechini), Blanja (Wray 

 140) ; Tringanu, Ismail Rantau (Down). Distrib. 

 Eastern Tropics. 



Addendum. 



Alsophila glabra Hook. Bukit Timah and other forests in 

 Singapore in damp spots. This is the plant mentioned as 

 Amplkosmia alteram from Singapore. It is named by 

 Mr. Matthew. 



E. A. Soc, No. 50, 1908. 



