300 
tinct-looking plant, with foliage of great 
substance. A fine kind. Brazil. 
ft. crenata. A distinct and handsome 
free-growing variety. 
f. Jonghei. Similar in habit to R. 
corcovadensis, but with bigger leaves. 
Brazil. 
kt. Porteana. A handsome kind. 
InsEcts.—The juices of these Rhopalas 
seem to be proof against insects, except 
mealy bug, which can easily be kept down 
by syringing. 
RICHARDIA (CALLA). 
For the distinct and elegant form of 
their flowers, as for their bold, handsome 
leaves, these greenhouse plants are alike 
remarkable ; the ease with which they can 
be grown still further enhances their 
merits. The pure white trumpet-shaped 
flowers of R. eethiopica are equally attractive 
when used for filling large vases as they 
are when growing on the plant. In addi- 
~ tion to their merits as cool greenhouse 
plants they bear forcing well, so that with 
a sufficient supply and means for bringing 
them on in heat they can be had in flower 
from the beginning of the year until 
far on in summer. The common white 
species may be termed an aquatic, and it 
will live and flower out-of-doors in a small 
pond or tank of water, sufficiently deep to 
prevent the roots being frozen. 
Callas are best increased from the 
suckers which they produce freely ; these 
should be taken off in the spring before 
growth commences and put singly in from 
3 to 6 inch pots, according to their size. 
They grow well in ordinary loam to which 
has been added a moderate quantity of 
sand. As soon as potted they should be 
stood in a house or pit—if with a little 
warmth they will move into growth 
quicker ; give plenty of water to keep the 
soil well moistened, and when they begin 
to move freely stand where they will be 
under the influence of full light. Do not 
shade even in the brightest weather unless 
the leaves are found to be scorched, as the 
stouter and shorter they are the better. 
About the end of June give pots a size or 
two larger, in which they will complete their 
growth and flower—standing out-of-doors 
from the latter end of August until there 
is danger of frost will benefit them by 
helping to mature the growth, on which 
their free blooming depends. The strongest 
plants may be had in flower at Christmas 
by placing them in moderate heat six 
weeks before ; stand well up to the glass, 
and do not let the roots want for water. 
They may be grown to a large size in the 
Greenhouse and Stove Plants. 
ROELLA. 
course of three or four years, so as to fill 
12 or 15 inch pots if required, by annually 
moving them on, but moderate-sized ex- 
amples consisting of two or three crowns 
in 8 or 10 inch pots are generally prefer- 
able. 
A still better way where the means 
exist is in the spring to turn them out of 
the pots, divide the crowns, and plant 
them in the open ground in rows, a foot 
apart, with a little more room between the 
rows, choosing an open situation ; here 
they will grow very strong if well supplied 
with water through the summer. About 
the middle of September take up and put 
in pots just big enough to hold their roots 
without undue pressure ; so treated they 
make short leaf-stalks and look better 
when in flower, but plants that have been 
managed in this way are not usually so 
good for the earliest forcing as such as 
have been grown in pots altogether, there- 
fore it is better to keep the outdoor-grown 
stock for later flowering. 
The undermentioned are well deserving 
of a place in every greenhouse :— 
R. albo-maculata. Leaves spotted with 
white ; a pretty variety. Africa. 
LR. ewthiopica. The best for greenhouse 
use. It comes from the Cape of Good 
Hope. 
R. hastata. ‘A yellow-flowered kind of 
moderate growth, deserving of a place. 
R. melanoleuca. A pretty kind, similar 
in habit to R. albo-maculata; the leaves 
are spotted with white, the spathes yellow, 
with a bold blackish-purple spot at the 
base. A South African species. 
Insects.—Richardias are not much sub- 
ject to insects except aphides, which often 
infest the leaves and flowers ; if these 
appear fumigate with tobacco. 
ROELLA CILIATA. 
This is a native of the Cape ; it has long 
been grown in a few collections of hard- 
wooded greenhouse plants, but from its 
very distinct general habit, and the un- 
common colour of its flowers, it seems 
strange that it has not been more fre- 
quently met with, especially as used for 
general decoration—its flowers, from their 
very unusual colour, associating well with 
almost any other plants. It is a free 
grower, but requires to be carefully looked 
after in respect to mildew, to which it is 
very subject, particularly in the winter 
season, if kept in too low a temperature ; 
in fact, to attempt to winter it in a chilly, 
damp atmosphere is to court almost certain 
destruction. There is one peculiarity 
natural to this plant that some persons 
