Naturalisation in Extra-Tropical Countries. 395 



Ptychosperma laccospadix, Bentham. 



North-Eastern Australia up to the cool elevation of 5,000 feet 

 [Sayer and Davidson]. Height to 15 feet, with a very slender 

 stem, thus well adapted for decoration of rooms. 



Ptychosperma JVIusschenbroekiana, Beccari. 



Tern ate, Insular India, up to 3,000 feet. Height of this palm 

 reaching 90 feet. Almost sure to be hardy in sheltered localities 

 of the warmer temperate zone. 



Pueraria Thunberglana, Bentham. 



Japan. There starch is prepared from the tubers of this climber. 

 The fibre of the bark is woven locally into cloth [Dyer]. 



Pueraria tnberosa, DeCandolle. 



Southern Asia, up to 4,000 feet. A tall woody twiner. Its large 

 tubers are edible, and might improve by culture. 



Pugioninm cornntum, Gaertner. 



From the Caspian Sea to China. This herb is grown by the 

 Mongols as a vegetable [Hance]. 



Punica Granatum, Linne. 



The Pomegranate. North-Africa and South- Westesn Asia, in 

 the Himalayas up to 6,000 feet. Well-known for its showy habit, 

 rich-colored flowers, peculiar fruit and medicinal astringeiicy, but 

 much overlooked regarding its value as a hedge-plant. Will grow 

 freely from cuttings. Purposely cultivated in Algeria for walking- 

 sticks [J. R. Jackson]. Passed with very few other plants through 

 years of drought in Central Australia [Rev. H. Kempe]. The 

 bark contains 32 per cent, tannin [Muspratt], and is also used for 

 dyeing the yellow Morocco-leather [Oliver]. The peel of the fruit 

 serves likewise for dye. For anthelmintic purposes particularly 

 the root-bark is administered. Concerning pelletierin and other 

 alkaloids from the root-bark, ample information is given, in Huse- 

 mann's and Hilger's Pflaiizenstoii'e (1884). A second species was 

 discovered by Prof. I. 13alfour in Socotra. 



Pycnanthemuxn incanum, Michaux. 



North- America. A perennial herb, in odor resembling both 

 Pennyroyal and Spearmint. It likes to grow on rocky woodland, 

 and on such it might be easily naturalised. 



Pycnanthemum montanum, Michaux. 



The Mountain-Mint of North- America. A perennial herb of 

 pleasant, aromatic, mint-like taste. These two particular species 

 have been chosen from several North- American kinds to demon- 



