Alkanna tinctoria, Tausch. 
Ou sandy places around tlie Mediterranean Sea. It yields 
the Alkanna root, used for dyeing oleaginous and other sub- 
stances. It might be naturalized. 
Allium Schcenoprasum, L. 
The Chives. Europe, Hortheru Asia and hTorth America. 
Available for salads and condiments. This species of Allium 
seems not yet so generally adopted in our culinary cultiva- 
tion as Allium Ascalonicum (the Shallot), A. Cepa (the 
ordinary Onion), A. fistulosum (the Welsh Onion), A. 
Porrum (the Leek), or A. sativum (the Garlick). A. Scoro- 
doprasum, or the Sand Leek of Europe and North Africa, 
resembles both Glarlick and Shallot. 
Aloe ferox, Mill. 
South Africa. This species yields the best Cape Aloe, as 
observed by Dr. Pappe. The siurply inspissated juice of the 
leaves of the various species of this genus constitutes the 
Aloe drug. It is best obtained by using neither heat nor 
pressure for extracting the sap. By re-dissolving the 
aqueous part in cold water, and reducing the liquid through 
boiling to dryness, the Extract of Aloes is prepared. All 
species are highly valuable in our Colony, where they are 
hardy, and can be used, irrespective of their medicinal 
importance, to beautify any rocky or otherwise arid spot. 
Aloe linguiformis, Miller. 
South Africa. According to Thunberg, from this species 
the purest gum-resin is obtained. 
Aloe plicatilis, Mill. 
South Africa. The drug of this species acts milder than 
that of A. ferox. 
Aloe purpurascens, Haworth. 
South Africa. Again one of the plants, which furnishes the 
Cape Aloe of commerce. 
Aloe socotrina, L,. 
Hills of the Island of Socotra. Also cultivated in Barbadoes 
and elsewhere, thus yielding the Socotrin Aloe. 
