MAY.] HOT-HOUSE OF REPOTTING, &c. 219 



scriptions will be limited, and simply such as are given 

 for the Green-house in March. 



Acacias. Several of these are desirable in the Hot- 

 house, for the grandeur of their foliage, beauty of 

 flower, and a few of them as specimens of valuable 

 medicinal plants. A. Homtoni, now Annesleia Houstoni, is 

 one of the most magnificent of the Mimosa tribe, bloom- 

 ing from August to November in large terminale spikes, 

 of a crimson colour, stamens very long, and beautiful ; 

 leaves bipinnated in pairs. A. grandiflbra, likewise gi- 

 ven to Annesleia, and similar to the former in colour ; 

 has very large compound bipinnate leaves, with from 

 twenty to forty pairs. A. Catechu, flowers yellow, wood 

 spiny, leaves bipinnated, about ten pairs. The inner 

 wood of this tree is of a brown colour, from which the 

 Catechu used in medicine is prepared It is disputed 

 whether A. Vera, or A-. Ardbica produces the gum Ara- 

 bic. We are inclined to think it is the latter, which 

 grows principally on the Atlas mountains. The gum 

 exudes spontaneously from the bark of the tree in a 

 soft half fluid state. There are many others of this 

 genus belonging to the Hot-house, but being shy in 

 flowering, are not generally esteemed. Most of the 

 flowers have the appearance of yellow balls of down, 

 and are hermaphrodite. The pots should all be well 

 drained. 



Aloe. These grotesque looking succulent plants 

 are principally natives of the Cape of Good Hope, and 

 consequently will do well in the warmest part of the 

 Green-house, although when convenient, they frequent- 

 ly get a situation in the Hot-house. It is not requisite, 



