OXALIS ROOT. 198 
radishes under frames, aiding vegetation by a slight bottom 
heat. As the season advances, successional supplies are 
sown once a fortnight. From the middle of July to the 
middle of September the turnip-radishes. are sown from 
time to time; and on the approach of frost they may be 
stored up in sand, and kept throughout winter. 
Oxauis Roots (Ozalis crenata, Jaca; .O. arracacha, 
G. Don) have of late years been cultivated for the table 
in England. The plant produces tubers at the root, some- 
what in the manner of the potato; but they are of smaller 
size, seldom exceeding that of a walnut. By cultivation, 
however, by manuring, laying down, earthing up, watering, 
and other helps known to horticulturists, considerable in- 
crease of size in the tubers may be effected. From the 
mode of culture adopted by the most intelligent gardeners, 
we conclude that a rich light soil is the most proper; that 
it is useful to forward the plants in a hot bed, in the way 
practiced with early peas, so as to have them ready to 
transplant by the middle or end of May; that in planting 
out they should be inserted in a sloping position, so that a 
considerable portion of the stem may be covered by the 
soil; that earthing up, or drawing up additional soil to the 
stems in June and July is important; and that laying 
down the stems horizontally in August, and covering them 
slightly (to the depth perhaps of two inches) with mould, 
tends greatly to promote their productiveness. It should 
be observed that the tubers continue to swell in size till 
November, or till stopped by frost. It is believed that the 
largest tubers, having full eyes or buds, yield the strongest 
plants; and, therefore, a portion of the largest should be 
reserved for seed-stock. Cut sets of these large tubers are, 
by some cultivators, preferred to whole tubers. The rest, 
