APOSTASIACEZ OF THE MALAY PENINSULA. 393 
Labellum integrum, album, basi oblongum, apice (epichilio) 
ovato-orbiculare deflexum; callus medianus conicus adest. 
Columna crassa, alba. Anthera pyriformis, obtuse rostrata; 
pollinia 6, angusta, elongata, inequalia, in discum ovatum 
attenuata; rostellum lineari-oblongum, bifidum. Stigma 
columna latius, quadratum, purpureo-marginatum. 
Hab. Singapore: Kranji! Chan Chu Kang! 
Selangor: Seppan! 
Also Rhio. 
A tufted plant remarkable for its shining dark green leaves 
and branching inflorescence of minute flowers. When dry, the 
whole plant becomes black. It is common on trees in mangrove 
swamps and banks of tidal rivers. 
THELASIS, Blume. 
T. ELoncATA, Blume, Orch. Archip. Ind., p. 23, t. 7, fig. 2, et 
t. 5, fig. C. 
Hab. Singapore: Kranji, on mangroves! &c. 
Johore: Batu Pahat! 
Pahang: Pekan! 
The common plant is so similar to Blume’s figure, that I 
have no doubt as to its being the plant he intended. It is 
abundant on the branches of trees in mangrove swamps. 
Cuming’s n. 2062, Philippines, looks exactly the same to me. 
It is a small insignificant plant with light green flowers. 
Var. major, Ridl., var. nova. Omnino major et validior. 
Pseudo-bulbi ferme pollicares. Folia 4 poll. longa, $ lata. Scapi 
5 poll. longa, validi; vagina in medio 3} poll. longa. Spica 
crassa. Bractese majores. 
Hab. Selangor: Kwala Lumpur, Kelsall! 
Pahang: Tahan River Woods! 
Different as this form looks from the common little stunted 
plant, I can only think it is a much larger and stronger 
variety, growing in wetter, more shaded, spots. 
T. caprrara, Blume, Bijdr., p. 386, et Orch. Archip. Ind., 
p. 20, t. 7, fig. 1. 
Hab. Perak: Scortechini. 
T. macrosuLBon, Ridl., sp. nova. Radices tenues copiose. 
Pseudo-bulbus e 2 nodis structus; nodus inferior } poll. longus 
