March."] green-house — repotting. 221 
is an excellent evergreen, but has no beauty in its flower. 
The foliage, when bruised, has a camphorated odour. (Soil 
No. 10.) 
Oistus, or Rock rose. There are above thirty species, 
principally natives of Europe, consequently hardy there, and 
form a great ornament to their gardens, being very abundant 
and various in flower ; but with us they will not stand the 
rigour of winter. We have no doubt, however, but, through 
time, some kinds may be grown that will withstand the great- 
est cold of the Middle States ; they are low shrubby plants, 
of easy cultivation. O. ladanifevus, 0. salignus, Qpopulifo- 
iius, C. undulatus, and C. formosvs, are perhaps the best; 
the flowers are of short duration, frequently only for one 
day ; but the quantity makes up this deficiency, being con- 
stantly in flower in May and June, and sometimes flower 
again in autumn. C. creticus is most productive of the gum 
laudanum, which is secreted about its leaves and branches. 
The flowers are generally five-petaled, and some of them 
large and showy; centre full of stamens. (Soil No. 3.) 
Citrus. This genus contains the most grand and noble of 
fruit-bearing trees ; Loudon says, " The golden apples of the 
heathens, and forbidden fruit of the Jews, are supposed to 
allude to this family." They are all handsome evergreen 
shrubs or trees, bearing highly odoriferous flowers, and beau- 
tiful golden fruit. In cultivation, the orange fruit is dry 
and more insipid than in the tropics, but the lemon is far 
superior in its quality. The varieties of orange are exten- 
sive, nearly eighty kinds being cultivated in Italy ; but, with 
us, the sweet, sour, and rough-skinned are the principal 
sorts, and more recently we cultivate the mandarin, Otahei- 
tan, and other beautiful dwarf Chinese varieties ; also, the 
striped-leaved varieties of Bergamotte. The lemon are nearly 
as numerous, though not so apparently distinct ; it is very 
valuable as a cultivated fruit, and should be in every green- 
house or conservatory. The lime and the shaddock should 
not be overlooked, as they are very ornamental, especially 
the latter when it arrives at a fruit-bearing state. (Soil No. 
18, when young plants, and when fruit-bearing keep from it 
the portion of sand.) 
Clematis, Virgin's Bower. There are only six of these 
belonging to the green-house, all climbing plants. C. aris- 
tdta } and C. brachiata are the best; flowers in racemose 
19* 
