THE FLOEAL WOELD AND GAEDEN GUIDE. 
187 
° !y of them to remain out during drenching rains, although none of 
tnem are so tender as serrulata ; and in placing them in the green- 
house for the winter it will not be necessary to be so particular in 
choosing a place for them as in the former case, as they are not so 
delicate, provided they have a nice, airy, light situation, and are 
wintered moderately dry. Most of the Boronias are very liable to 
the attacks of mildew, which, if not kept down, will ultimately 
destroy the plants. This frequently makes its appearance in autumn, 
after, and sometimes before they are placed in their winter quarters. 
As soon as it is perceived, apply sulphur, which entirely destroys it. 
I have always found sulphur efficient, and I have made a practice, 
every autumn, of dusting the plants all over with it, and allowing it 
to remain upon them until spring, when a syringe and some clean 
water will remove it, and they then look green and healthy. 
THE GENUS CTTISUS. 
BY A COKEESPOXDENT. 
HE species and varieties belonging to this genus are 
among the gayest aud most easily cultivated of our 
winter and early spring flowering plants, producing, 
with ordinary management, an abundance of bright- 
coloured cheerful-looking flowers, for some three months 
in succession ; and for amateurs, having only a small collection of 
plants, nothing could be more useful. Beginners should commence 
with young plants, of C. racemosus, for instance, which if procured 
at once, will form nice little specimens for blooming in spring; they 
should be placed in a cold frame, or a cool airy part of the green- 
house, giving them plenty of water at the root, syringing them 
overhead on the mornings and evenings of bright days, and keeping 
them near the glass, to induce close, short-jointed growth. If the 
pots are found to be well-filled with roots, which, in the case of 
healthy plants received from the nursery, will be sure to be the 
case, give a liberal shift, say into pots two sizes larger than those in 
which they have been growing. 
For soil, use about equal parts of good, rich, light turfy loam, 
and strong fibry peat, broken up, so that it w r ould pass through a 
half-iuch-mesh sieve, and well intermixed with sharp sand, and some 
lumpy bits of charcoal, to keep the mass open after the decay of the 
fibre. Care should be observed to thoroughly drain the pots, for 
the plants will be found to require a very liberal supply of water ; 
and unless perfect drainage is secured, the soil will he apt to 
become sour towards the bottom of the pots. Beyond the ordinary 
routine of watering, syringing, etc., very little attention will be 
necessary during the growing season ; but if a spider should make 
its appearance, no time must be lost in eradicating it, by laying the 
plants on a clean mat, and thoroughly washing the under sides of 
Jane. 
