in Extra-Tropical Countries. 255 



Passiflora pedata, Linne. 



From the West-Indies to Guiana. This is among the species, 

 mentioned by Dr. Rosenthal as yielding edible fruits. 



Passiflora quadrangularis, Linn<*. 



Brazil. One of the most commonly cultivated Granadillas. The 

 fruits attain a large size. 



Passiflora serrata, Linne". 



From the West-Indies to Brazil. 



Passiflora SUberosa, Linn. (P. pallida, Linn. ) 



From Florida to Brazil. A careful investigator, Dr. Maxw. Mas- 

 ters, has recently defined about 200 species of Passion-flowers. 



Passiflora tiliifolia, Cavanilles. 



Peru. Fruit edible, according to Dr. Rosenthal. 



Paullinia sorbilis, Martius. 



Brazil. A climbing shrub, possibly hardy in the warm temperate 

 zones, where many tropical Cupaniae and other sapindaceous trees 

 endure the clime. The hard Guarana-paste of chocolate-color is 

 prepared from the seeds by trituration in a heated mortar with admix- 

 ture of a little water, kneading into a dough and then drying. This 

 paste, very rich in coffein, serves for a pleasant beverage, and is also 

 used medicinally. 



Paulownia imperialis, Siebold. 



Japan. A tree, hardier than Cercis Siliquastrum, of value for scenic 

 effects. It will endure the climate of Norway to lat. 58 58' (Profes- 

 sor Schuebeler). Rises in 10 years to 30-40 feet. 



Peireskia aculeata, Miller. 



The Barbadoes-Gooseberry. West-Indies. A tall shrub, adapted 

 for hedges in localities free of frost. The cochineal-insect can be 

 reared on this plant also. The berries are edible; the leaves available 

 for salad. Several other species exist in tropical America, among 

 which P. Bleo, Humb., is particularly handsome ; but they may not 

 all be sufficiently hardy for utilitarian purposes in an extra-tropical 

 clime. 



Peireskia portulacifolia, Haworth. 



West-Indies. This attains the size of a fair tree. 



Pelargonium odoratissimum, Alton. 



South-Africa. A perennial trailing herb, from the leaves of which 

 a fragrant oil can be distilled. Pelargonium-oil is extensively pro- 

 duced in Algeria as a cheap substitute for attar of roses. There the 

 rate of annual production of the " essence of geranium " being about 

 12,000 Ibs. One ton weight of fresh leaves will yield about 2 Ibs. vola- 

 tile oil (Piesse). The same remark applies to the shrubby P. radula 



