296 
Greenhouse and Stove Plants. 
PSYCHOTRIA, 
where they will get plenty of light; as 
soon as the little pots are full of roots move 
into others an inch or two larger, using 
soil like that advised for the single kinds. 
A good light house or pit is better suited 
for the growth of this section of Primulas 
than frames such as recommended for the 
single sorts. The general treatment re- 
quired through the summer in the matters 
of soil, air, water, and shade is similar to 
that needed by the single varieties. Con- 
sequently, all further that is necessary is 
to move the plants on into larger pots when 
those they are now in get fairly filled with 
roots. When the weather becomes cold in 
autumn the double sorts should be placed 
where they can have a little more warmth— 
from 45° to 50° in the night is not too much, 
and be stood near the glass. In a low 
temperature it is scarcely possible to avoid 
many going off by damping, as a further 
precaution against which the soil should 
be kept raised right up to the foot of the 
stalks of the lower leaves. 
The single Primulas have been so much 
improved in recent years, that all needful 
is to secure good strains of the white, red, 
and purple forms. Of double kinds there 
are several sorts of white, pink, and red, 
that afford enough variety for all purposes. 
P. japonica. Makes a useful pot plant 
for greenhouse or conservatory decoration. 
It is easily raised from seed. 
P. Sieboldii (cortusoides amena). This 
is a beautiful species of which there are 
many forms, varying in colour from white 
to pink, lavender, red, and crimson. These 
are nearly hardy, and are charming plants 
for greenhouse decoration, for which they 
should be kept in pots, plunged and pro- 
tected in frames through the winter. They 
are increased by division of the crowns, 
potted and grown on in cold frames. 
InsEects.—Aphides are almost the only 
insects that affect Primulas; the best 
method of destroying them is by fumiga- 
tion with tobacco. 
PRITCHARDIA. 
A beautiful genus of stove Palms, so dis- 
tinct in appearance that they should find a 
place everywhere where large fine-leaved 
plants are grown. 
For propagation and cultivation, see 
Palms, general details of culture. 
P. Martii. A handsome species with 
massive, deeply-plaited leaves. From the 
South Sea Islands. 
P. pacifica. A noble plant with very 
large palmatisect, plaited leaves, that re- 
curve considerably at their outer edge. It 
is manageable in size so that it can be 
accommodated in an ordinary-sized house. 
From the Polynesian Islands. 
PRONAYA ELEGANS. 
An evergreen plant from the Swan River 
with blue or lilac flowers, produced in 
summer. It is not very attractive or much 
grown, but it can be used as a roof-climber. 
It can be raised from seeds sown in 
spring, or shoot cuttings put in at the same 
season, treated in the ordinary way in a 
temperature of 65°; pot on when rooted 
and keep in a medium heat until mid- 
summer, when give more air, and treat as 
required for the generality of greenhouse 
species. Winter at about 45°, and in spring 
give more pot-room. The plant is a mode- 
rate grower, and does best in good fibrous 
peat, with some sand ; through the summer 
give such treatment as is required by other 
Australian plants, with plenty of light and 
air. The spring following turn out in the 
border where they are to be grown, and 
train the shoots as they extend. 
InsEcts.—Red spider is often trouble- 
some, unless the syringe is kept regularly 
in use through the growing season. It is 
also more subject to aphides than most 
plants of like description, and must be 
frequently fumigated, or the young leaves 
get crippled. 
PROSTANTHERA. 
Evergreen greenhouse flowering shrubs, 
not much valued at the present day. They 
thrive under treatment such as advised for 
Chorozemas, which see. 
The following are the best of the genus : 
P. lasianthos. Is a summer bloomer ; 
it bears purple flowers, and comes from 
New South Wales. 
P. linearis. Also a summer bloomer, 
with purple flowers, from New South 
Wales. 
PSYCHOTRIA JASMINIFLORA. 
This plant, usually known as Gloneria 
jasminifiora, is of comparatively recent in- 
troduction, and is well worth a’place. It 
is an evergreen species of neat growth, re- 
quiring stove heat. The flowers are white, 
borne at the points of the shoots in bunches, 
like those of a Bouvardia. It blooms in 
spring. 
Its mode of propagation, and the general 
culture required, are such as advised for 
Jasminums, which see. It comes from 
Brazil. 
InsEcts.—Scale and mealy bug are often 
troublesome on the plant, and must be 
