VINES FOR THE COOL HOUSE 179 
be represented in the cool greenhouse by several 
very attractive, ornamental foliage species. 
These are especially valuable in the conservatory 
for training over small supports. 
If desired for permanent effect, these vines 
should be planted in an open border and allowed 
to ascend wires stretched every six inches along 
the back or end wall of the house. They require 
little or no pruning, should be rested but little 
during the winter, and must be shaded in summer. 
The best species to grow in pots is A. crispus, 
a dwarf (four to eight feet), but very attractive 
on account of its peculiarly glaucous-green 
foliage. For a permanent effect, use in the 
border 4. verticillatus, of which the tufted, dark- 
green foliage will cover fifteen feet of wall. In 
a warmer house J4. lucidus, a low climber with 
edible tubers, will do very well in pots. JZ. ret- 
rofractus is also an excellent subject for pot cul- 
ture, especially adapted to covering small trellises 
in the dwelling, in spite of its extreme trailing 
habit. 
Where the temperature does not fall below 
40°, and where there is sufficient head room for 
its development, the sweet pea (Lathyrus odora- 
tus) is a very popular source of exceedingly 
beautiful cut flowers. While it is well adapted 
