Naturalisation in Extra-Tropical Countries. 281 



regions. The milky juice from cuts into the stem when exsiccated 

 forms the Balata of commerce, a substance in its qualities allied 

 both to Gutta-percha and India-rubber [Jenman]. Wood very 

 dense and also elastic. 



Blimusops Sieberi, A. de Candolle. 



West- Indies and Florida. Tree reaching 30 feet in height- 

 Fruit of agreeable taste [Sargent]. 



Ittonarda didyma, Linne. 



Eastern North-America. Hardy to lat. 59 55 ' in Norway. A 

 perennial odorous herb, producing the medicinal Oswego- or 

 Beebalrn-Tea. M. fistulosa, L., and several others are also of very 

 strong scent. Their volatile oil contains thymol. 



BXonarda punctata Linne. 



Eastern North- America, where it is called " Native Horse-mint." 

 Bees extract an astonishing quantity of honey from this plant. 

 M. citriodora (Cervantes) is an allied lemon-scented species, 

 extending from the South-Western States to Mexico. 



XtXonodora Angolensis. Welwitsch. 



Tropical West-Africa, up to the comparatively cool elevation of 

 3,500 feet. A tree attaining 30 feet in height. The pleasantly 

 aromatic seeds come into the market, like those of the following 

 species ; they measure about half-an-inch in diameter and are pro- 

 duced in good numbers. 



IMConodora IWCyristica, Dunal. 



The Calabash-Nutmeg. West-Africa, within the tropics, ascend- 

 ing to 2,500 feet. A tree attaining as a maximum 60 feet in height 

 [Dr. Welwitsch]. Leaves occasionally 2 feet long and 8 inches 

 broad ; foliage thus grand. Hardy at Port Jackson, according to 

 Mr. Ch. Moore. The seeds serve as nutmegs. 



DXontia fontana, Linne 



In many of the cooler regions of the world. A very small annual 

 herb. Consumed in Thuringia and in the adjoining countries much 

 as salad [Prof. Noerdlinger] . Easily naturalised on springy 

 ground. 



JVConstera deliciosa, Liebmann. 



Mexico and Guatemala, in the mountainous region. One of the 

 grandest of aroid plants, climbing to a height of 12 feet or 

 occasionally more; leaf-stalks often 3 feet long. The fruit is 

 edible, and of a luscious ananas-flavor [Dr. Masters] . In Australia 

 it ripens as far south as Port Jackson. The plant is important 

 also for scenic culture. Succeeds as far south as Durban in Natal 

 [J. M. Wood]. 



