OXALIS ROOTS. 199 



the turnip-rooted radish ; and of these the subvarieties 

 are numerous. The following may be mentioned : 



Spindle-shaped. Round-shaped. 



Short-topped Scarlet. AVhite Turnip. 



Scarlet Salmon. Yellow Turnip. 



Long White. White Spanish. 



White Russian. Black Spanish. 



The first two and the white turnip radish are best suit- 

 ed for early crops, the scarlet salmon for summer, the 

 yellow turnip for autumn, and the white and black 

 Spanish for winter. There are, besides, oval or oblong 

 Summer Radishes, both white and red, lately brought 

 into notice. 



Some cultivators in England sow their earliest crop 

 in November, in a warm situation, at the foot of a wall 

 or in front of a pinery, and continue sowing once a 

 month, if weather permit, during winter. Others grow 

 their first radishes under frames, aiding vegetation by a 

 slight bottom-heat. As the season advances, succes- 

 sional 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 ap- 

 proach of frost they may be stored up in sand, andiept 

 throughout winter. 



OxALis Roots ( Oxalis crenata, Jacq. ; 0. arracachaj 

 G. Don) have of late years been cultivated for the table 

 in England. The plant produces tubers at the root, 

 somewhat 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, earth- 

 ing up, watering, and other helps known to horticultur- 

 ists, considerable increase of size in the tubers may be, 

 effected. From the mode of culture adopted by the 



