180 
LIST OF GREENHOUSE SHRUBS. 
CALOTHAMNUS. 
C. QUADRiFiDA is a beautiful little shrub of delicate growth ; it thrives in sandy 
heath mould, mixed with a little light loam, and requires to be carefully watered^ or 
it is very liable to drop off in damp weather. It is increased by cuttings, which 
will require to be treated like those of Erica. See Vol. I. page 237, 238, and 113. 
CORR^A. 
C. SPECIOSA and versicolor are well known and easily cultivated plants, 
growing readily in heath mould and light loam. They are propagated by cuttings 
of the ripe wood planted in sand, and covered with a glass, but not plunged in a 
hotbed, or they are liable to damp of£ ; the best way is to treat them in the same 
way as Erica cuttings. They grow slowly, and are therefore considered rather 
difficult to strike, but if planted thinly, and allowed plenty of time, they grow very 
freely. 
CROTALARIA. 
C. PURPUREA. A handsome species of very easy growth, easily propagated by 
both seeds and cuttings of half-ripened wood, which should be covered with a glass. 
CASSIA. 
C. PULCHELLA grows easily in a mixture of heath mould and loam, and strikes 
freely from cuttings of the ripe wood^ also from seeds ; but they seldom ripen in our 
greenhouses unless planted in very favourable situations. 
CRASSULA. 
C. cocciNEA and versicolor are two succulent plants, usually potted in the 
same kind of soil as Cactese ; but we prefer growing them in a mixture of rich loam 
and leaf mould, or very rotten dung. The flowers produced from this compost are 
of a very deep rich colour, and the leaves have not that unhealthy appearance they 
have in a poor soil. All the care requisite is not to overwater them, as the danger 
is greater by this mode of growing them than in the usual one ; give a good 
drainage, never water overhead, and let the soil always appear dry before any be 
given in the pot. They increase freely by cuttings, which should be laid a day or 
two on a shelf to dry, afterwards planted close round the edge of a small pot, 
filled with the above soil, and be plunged in a cucumber frame, where they will 
scarcely require any water until after they are potted off, 
CRAT^GUS. 
C. GLABRA, now usually called Photinia serrulata, is rather a rare plant, it 
has bright shining leaves, and will grow very freely in any light rich loam ; they 
grow beautifully planted out in the border of a conservatory, and also thrive well 
in the open air trained against a wall, or in warm situations in the open border. 
Cuttings of the ripe wood planted in sand about the middle of September, on a 
warm south border, covered with a hand glass, will strike root very freely ; it may 
also be grafted and inarched on the common thorn and other plants of a similar 
habit. 
CALLISTEMON. 
C. SCAB R A. This beautiful species (usually called metrosideros) is a most 
desirable plant for a conservatory. It is nearly hardy, and thrives well in the open 
borders in warm situations ; heath mould mixed with about a third of light loam 
