VINES FOR THE COOL HOUSE 173 
spring and summer. This variety likes the heat 
and will do well in a night temperature of 60°. 
The best blue-flowered form is P. c@rulea, or, 
rather, the predominant colour of its variegated 
blossoms is blue. These are succeeded by egg- 
shaped, yellow fruits which are quite attractive. 
The fruit of the popular Granadilla (P. quadran- 
gularis) is some six inches long and not only 
attractive, but also edible. To procure it, 
however, the white, red, and purple flowers must 
be hand-pollinated in late summer. The best 
red-flowered type, (P. racemosa), is valuable 
only because of the colours of the blossoms, 
which are rather small. Other good varieties 
are P. Raddiana, a very common form, with 
crimson and purple flowers; P. edulis, white- 
and purple-flowered, with large, lobed foliage, 
and edible fruit; and numerous other species less 
known and but slightly grown. 
A good vine for cut-flower purposes and for 
training along the rafters and supports in a 
house where the temperature is kept above 50° is 
the leadwort (Plumbago sp.). It is very free 
flowering, producing clusters on stems about a 
foot long. The vine requires the general treat- 
ment necessary for vines already described, 
but will stand drying off thoroughly during 
