4 THE GESNERACE^E OF THE MALAY PENINSULA, 



tube bearded with yellow hairs. The headquarters of 

 the genus is India and Southern China, but a number of 

 species occur in Java and Sumatra, mostly in the lime- 

 stone districts. Six species occur in the Peninsula, five 

 of which are endemic and one gets to Siam. 



Loxocarpus, a small genus referred to Didymocarpus as a section 

 by Mr. Clarke, seems sufficiently distinct in its short 

 tubed and short stamened flowers and horn-like capsule. 

 All the species are closely allied. There are about 7, 

 of which three endemic ones occur in the Malay Pen- 

 insula, the remainder in Borneo. 



The next three genera comprise the plants with short tubed 

 flowers, 2 very short stamens with longer style, and 

 narrow cylindric fruit. Paraboea is merely distinguished 

 from Boea by its capsule not twisting when splitting. 

 The genus was amalgamated with Didymocarpus by 

 Clarke, but should certainly be kept separate. In 

 P. cordata and two allied species, the corolla is campanu- 

 late. The other species have hardly any tube to the 

 corolla at all. This latter section is confined to lime- 

 stone rocks, while P. cordata and its allies are found on 

 granite or sandstone. The flowers are all small and 

 white or at most tinted with pink. There are about 20 

 species known, some from Borneo and Siam. All the 12 

 Malay Peninsula species are endemic. 



Boea resembles Paraboea except that the capsule is spirally 

 twisted in dehiscing. It includes about 22 species, rang- 

 ing India, Khasiya hills, through Burma, China, Formosa 

 and Cochin Qhina, the Malay islands to New Guinea, and 

 the Philippines to Australia and New Ireland. All the 

 species known to me inhabit limestone rocks, except 

 B. elegans, which grows on the granite precipices of Kedah 

 Peak. They are usually half-shrubby plants with silvery 

 white leaves covered with felted silky hairs. There are 

 two sections, one has usually tall leafy stems rising 

 from a large rosette of leaves, with a woody stem 

 below which grows in clefts of rocks. The flowers 



Jour. Straits Branch 



