10 Select Plants for Industrial Culture 



Acacia Verek, Guillemin and Perrottet. 



From Senegambia to Nubia. Affords the best white gum arabic 

 of the Nile-region, and a large quantity of this on a commercial scale. 

 A. Etbaica (Schweinfurth) from the same region produces also a 

 good mercantile gum. 



Acanthophoenix rubra, H. Wendland. 



Mauritius and Reunion. This palm has proved hardy in Florida, 

 also as far south as Sydney (C. Moore). Height reaching 60 feet. 

 The upper rings of the stem are of a bright red. In gardens usually 

 passing as an Areca. 



Acanthosicyos horrida, Welwitsch. 



In the deserts of Angola, Benguela and Damarland. This thorny 

 erect, cucurbitaceous shrub bears fruit of the size and color of oranges 

 and of pleasant acidulous taste. The seeds are also edible. No rain 

 occurs in the Acanthosicyos- and Welwitschia-region, but the mean 

 heat does not exceed 70 F. and the soil is kept somewhat moist 

 through capillarity from beneath. 



Acer Campbellii, J. Hooker and Thomson. 



The chief Maple of the North-Eastern Himalayas. A large tree. 

 Freely reproduced by seed or coppice. Wood pale, close-grained, 

 particularly valuable for planking (Gamble). 



Acer campestre, Linn^. 



The British Maple. Extends from South- and Middle-Europe to 

 Northern Africa, also to many parts of Asia. Height reaching 40 

 feet, in shelter and deep soil; the yellow and purple tints of its foliage 

 in autumn render the tree then particularly beautiful. Occurs in Nor- 

 way to 63 26' N. L. (Prof. Schuebeler). The wood is compact and 

 fine-grained, and sought for choice furniture, machinery and musical 

 instruments. The tree can be trimmed into hedges. Comparatively 

 quick in growth, and easily raised from seed. These remarks apply 

 to many kinds of maples. 



Acer circinatum, Pursh. 



The Vine-Maple of North- Western America, forming in some 

 parts of Oregon impenetrable forests on account of its long branches 

 bending to the ground and striking root; its autumnal tint gives 

 quite a picture to the landscape.' The stem is sometimes 40 feet 

 long, but slender. Found to be hardy as far north as Christiania 

 or even Nyborg, in lat. 70 10', where the mean annual temperature 

 is 29 F., the highest 95 and the lowest 40 F. (Professor Schue- 

 beler). The wood is heavier and of closer grain than that of A. 

 macrophyllum (Dr. Gibbons); very tough, used for helves. 



Acer dasycarpum, Ehrhart. (.4. saccharinum, Linne".) 



The Silver-Maple of North-America. Requires a rather warmer 

 climate than the other American maples, but has proved hardy in 

 Norway as far as 59 55' N. (Schuebeler). Height reaching 50 feet; 

 stem sometimes 9 feet in diameter. Much praised for street-planting; 



