360 MANUAL OF GARDENING 
down by frost, dig them, dry the roots of superfluous moisture, and 
store till wanted in late winter or spring. 
Calceolaria. — The calceolarias are small greenhouse herbs some- 
times used in the window-garden. They are not very satisfactory 
plants for window treatment, however, since they suffer from dry 
atmosphere and from sudden changes of temperature. 
The calceolarias are grown from seeds. If the seeds are sown in 
early summer and the young plants are transplanted as they need, 
flowering specimens may be had for the late fall and early winter. In 
the growing of the young plants, always avoid exposing them to direct 
sunlight; but they should be given a place that has an abundance of 
screened or tempered light. A new crop of plants should be raised 
each year. 
There is a race of shrubby calceolarias, but it is little known in this 
country. One or two species are annuals adaptable to cultivation in 
the open garden, and their little ladyslipper-like flowers are attractive. 
However, they are of secondary importance as annual garden flowers. 
Calla (properly Richardia), Egyptian lily.— The calla is one of 
the most satisfactory of winter house-plants, lending itself to various 
conditions. 
The requirements of the calla are rich soil and an abundance of 
water, with the roots confined in as small a space as possible. If a 
too large pot is used, the growth of foliage will be very rank, at the 
expense of the flowers; but by using a smaller-sized pot and applying 
liquid manure, the flowers will be produced freely. A 6-inch pot will 
be large enough for all but an exceptionally large bulb or tuber. If 
desired, a number of tubers may be grown together in a larger pot. 
The soil should be very rich but fibrous — at least one third well-rotted 
manure will be none too much, mixed with equal parts of fibrous loam 
and sharp sand. The tubers should be planted firmly and the pots 
set in a cool place to make roots. After the roots have partially filled 
the pot, the plant may be brought into heat and given a sunny position 
and an abundance of water. An occasional sponging or washing of 
the leaves will free them from dust. No other treatment will be re- 
quired until the flowers appear, when liquid manure may be given. 
