22 SELECT PLANTS FOR INDUSTRIAL CULTURE 



Aloe linguiformis, Miller. 



South Africa. According to Thunberg, from this species the purest 

 gum-resin is obtained. 



Aloe plicatilis, Miller. 



South Africa. The drug of this species acts milder than that of 

 A. ferox. 



Aloe purpurascens, Haworth. 



South Africa. Another of the plants which furnish the Cape aloe 

 of commerce. The South African aloe arborescens (Miller) and 

 A. Cominelyni (Willdenow) are also drawn into use for aloe, 

 according to Baillon, Saunders and Hanbury. 



Aloe SOCOtrina, Lamarck. (A. vera, Linne.) 



Hills of the Island of Socotra. Extending as a native plant along 

 the Red Sea and the shores of India. Also cultivated in Barbadoes 

 and elsewhere, thus yielding the Socotriii aloe and Moka aloe. 



Aloe spicata, Thunberg. 



South Africa. This also provides Cape aloe. It is an exceedingly 

 handsome plant. 



Aloe vulgaris, Lamarck. 



The Yellow-flowered Aloe. Countries around the Mediterranean 

 Sea, also Canary Islands, on the sandy or rocky sea-coast. Such 

 places could also here readily be utilised for this and allied plants. 

 Dr. Sibthorp identified this species with the A\6rj of Dioscorides ; 

 hence it is not probable that A. vulgaris is simultaneously also 

 of American origin, although it is cultivated in the Antilles, and 

 furnishes from thence the main supply of the Barbadoes aloe, also 

 Curagao aloe. In East India this species also seemingly only exists in 

 a cultivated state. Haworth found the leaves of this and of 

 A. striata softer and more succulent than those of any other aloe. 

 It is said to be the only species with yellow flowers among those 

 early known. It is also this species only which Professor Willkomm 

 and Professor Parlatore record as truly wild in Spain and Italy. 



Aloe Zeyheri, Harvey. 



South Africa. A magnificent, very tall species ; doubtless valuable 

 like the rest. 



Aloexylon Agallochum, Loureiro. 



Cochin-China, on the highest mountains. The precious aloe- wood, 

 so famed for its balsamic fragrance and medicinal properties, is 

 derived from this tree. 



