Naturalisation in Extra-Tropical Countries. 371 



and other kinds of cabinet-work. Propagation from seeds or 

 cuttings. Growth in height at Port Phillip 30-40 feet in 20 years. 

 An evergreen plane was mentioned already by Plinius as occurring 

 in Candia [Sir J. Hooker], and has lately been re-discovered. 



Platanus racemosa, Nuttall. 



The Calif ornian Plane-Tree. A good promenade-tree, which 

 according to Prof. Bolander growls more rapidly and more compact 

 than P. occidentalis. Wood harder and therefore more durable, 

 also less liable to warp. According to Dr. Gibbons, the tree attains 

 a height of about 100 feet and a stem-diameter of 8 feet. The wood 

 is brittle ; in use however by turners. 



Plectocomia Himalaiana, Griffiths. 



Sikkim, up to 7,000 feet, extending to 27 north latitude. This 

 Rattan-Palm requires moist forest-land. Its canes are not durable ; 

 but the plant is an object worthy of scenic horticulture, and would 

 prove the hardiest among its cogeners. P. elongata (Blume) 

 ascends, according to Drude, to 4,500 feet. 



Plectocomia macrostachya, Kurz. 



Tenasserim, at about 3,000 feet elevation, therefore most likely 

 hardy in temperate lowlands. 



Plectranthus BXadagrascariensis, Eentham. 



Madagascar. This herb produces nutritious tubers [Mingard 

 and Daruty]. 



Plectronia ventosa, Linne. 



South-Africa. A hedge-bush, like P. ciliata (Sender) and P. 

 spinosa (Klotzsch). 



Plumiera acutifolia, Poiret. 



Tropical America. A small, thick-branched tree, hardy at some 

 distance beyond the tropics. It is of such easy cultivation, that it 

 may become important, like many other as yet neglected apocyn- 

 aceous plants, for the scent of its large and copious flowers. 



Poa Abyssinica, Jacquin. (Eragrostis Abyssinica, Link.) 



The Teff of Abyssinia, Nubia, Egypt, and nearest lands. The 

 grain of this annual grass there extensively used for bread of an 

 agreeable acidulous taste. According to Prof. Schweinfurth the P. 

 Aegyptiaca, Willdenow (E. Aegyptiaca, Delile) is identical. 



Poa airoides, Koeler. (Catabrosa aquatica, Beauvois.) 



The Water Whorl-grass. Europe, North -Africa, Northern and 

 Middle Asia, North-America. A creeping grass, suitable for 

 pastures subject to inundation ; hence fit also for irrigation. 



Y2 



