Remarks on the Culture of Exotic Vegetables. 301 



sometimes require water to be given, but too much is inju- 

 rious, and in the Citrus tribe produces disease, which is 

 shewn by the leaves becoming of a sickly yellow colour, and 

 together with the immature fruit falling off. 



The insects which infest those trees may be destroyed by 

 making a ]ye of soft or black soap, nearly of the consistence 

 of cream, adding thereto four ounces of tobacco-dust, and 

 one ounce of sulphur vivum to each gallon. On the stems 

 this mixture may be applied with a brush, and the leaves 

 sprinkled therewith by a garden engine or watering-pot. 



Of citrus medica, lemon, or zuurlemoen, there are three 

 leading varieties in the colony ; of these the large oval-shaped 

 with a prominent nipple, is the best, as being the most acid 

 variety. 



The citron is considered a variety of C. medica. 



Citrus decumana. Shaddock or pampelmoes, is deserving 

 extensive culture for sea stock, as it keeps good for some time. 



Citrus nobilis. Mandarin orange or narretje. Several va- 

 rieties of this fruit are in the colony, many of which are 

 insipid. Grafts of better kinds should be placed on those 

 stocks. 



A young healthy plant of the Maltese bloody-orange was 

 brought to the colony in 1827. When this variety becomes 

 known, and can be increased, it will supercede many of the 

 varieties of the Cape orange. 



The Bahia orange, a large fruit without seeds in the centre, 

 but having a navel at the crown containing the rudiments of 

 seeds, would be valuable to the colony ; plants of this sort 

 may, perhaps, be procured from Rio de Janeiro ; it was, how- 

 ever, scarce there in 1816. 



Nat. Ord. CAMELIEiE. Decandolle. Monodelphia Poly- 

 andria, Lin. 



CAMELLIA thea. Boheatea. 



This plant, which has become so interesting in regard to 

 commercial pursuits, and whose leaves are even considered as 

 a necessary of life to many millions of people in every rank of 

 society, has been long since introduced to this country, but 

 without attracting that notice, which even common curiosity 

 might excite. I am not aware, however, of its being in ex- 

 istence at present in the colony ; it was here in 1814. 



This plant may be readily propagated by seeds, layers, and 

 cuttings, treating them in a similar way as the citrus. If 

 cultivated to any extent, the young plants should be placed 

 in rows in a nursery-bed for one year, with about nine 

 inches between each plant. On the final planting out where 

 they are to remain, a distance of three feet is requisite. 



The tea-shrub grows freely in light sandy soil, but some- 



