434 Select Plants for Industrial Culture and 



Psophocarpus tetragon olobus, De Candolle. 



Tropical Africa, perhaps to Madagascar. A climber with annual 

 stem ; pods to one foot long, used as peas. P. palustris (Desvaux) 

 is closely allied, and has shorter pods. Likely to ripen fruits also 

 outside the tropics. 



Psoralea esculenta, Pursh. 



North- America. This herb is mentioned here, as its tuberous 

 roots, known as the Prairie-Turnip, may be capable of great 

 improvement by cultivation, and of thus becoming a valuable 

 esculent. 



Psoralea patens, Lindley. 



Continental Australia. A perennial easily disseminated herb, of 

 which herds and flocks are very fond ; the plant is free of 

 deleterious properties. P. plicata (Delile) is a closely allied species, 

 which extends from South-Western Asia to Tropical Africa. 



Psychotria Eckloniana, F. v. Mueller. ( Grumilia cymosa, E. Meyer. ) 



South-Africa. Dr. Pappe describes the wood of this tree as of a 

 beautiful citron-yellow. 



Ptaeroxylon Tltile, Ecklon and Zeyher. 



Sneezewood. This tree supplies one of the most durable of South- 

 African timbers, which is consequently largely used for fencing 

 poles, submarine work, and for shoes for Yellow-wood in house- 

 building, but it is very hard and difficult to work. Splits easily and 

 burns well. Still employed by the Kaffirs as tinder, and formerly 

 used by them to produce fire by friction [T. R. Sim]. 



Pterocarpus Indicus, Roxburgh. 



The Lingo of China and Padauk of India. A tree of considerable 

 dimensions, famed for its flame-red durable wood. It furnishes also 

 a kind of dragon-blood resin. 



Pterocarpus marsupium, Roxburgh. 



India, ascending in Ceylon and the Circars to fully 3,000 feet 

 altitude ; hence this tree would doubtless grow without protection 

 in those tracts of the temperate zone, which are free from frost. 

 The tree is large when in its final development ; its foliage is 

 deciduous. It exudes the best medicinal kino, which contains 

 about 75 per cent, of tannic acid. P. santalinus (Linne fil.), which 

 provides the Saunders or Red Sandal-Wood, is also indigenous to 

 the mountains of India and important for dye-purposes. 



