GENERA AND SPECIES 103 



in the chapter on the potting of terrestrial Orchids. The 

 species are evergreen, and require but a short resting season. 

 They require shade. 



Phalaenopsis. These are warm-house species from the 

 Philippines, Java, Borneo, India, and other places. Pot 

 the plants in Sphagnum-moss. They succeed best when 

 suspended, but if they are grown on the stage they should 

 be elevated on inverted pots. A moist atmosphere is 

 essential. P. amabilis Rimestadiana will grow in the 

 intermediate house ; so will also most of the other species, 

 if placed in a moist corner. 



Peristeria. The genus is best known in gardens by P. 

 elata (Dove Orchid). The cultivation is similar to that for 

 Phaius. 



Physosiphon. A small genus allied to Stelis. P. Loddi- 

 gesii has racemes of orange-coloured flowers. 



Platyclinis. These are pretty, intermediate-house Or- 

 chids, with pendulous racemes of white or yellow flowers, 

 generally fragrant. 



Pleione. See Coelogyne. 



Pleurothallis. A large genus of elegant, dwarf-growing 

 Orchids for the intermediate house. 



Promenaea. See Zygopetalum. 



Renanthera. These showy species are natives of Tro- 

 pical Asia and Malaya. They should be grown like Aerides 

 and Vandas. R. Imschootiana is a compact, free-growing 

 species, with showy, crimson flowers. 



Restrepia. A cool-house genus usually grown with the 

 Masdevallias, and requiring similar treatment. 



Rodriguezia. This genus includes the species usually 

 called Burlingtonia in gardens. Suspend the plants in the 



