Raphanus sativus
China Rose Radish Seed (55 days)

Introduced in the US around 1850.  Plant around August.  The is a fall/winter radish.

1924 Portland Seed Co. Catalog says about China Rose Radish....
"One of the best fall and winter varieties; a favorite with market gardeners, bright rose color; flesh white, firm and of superior quality." 

1935 Isbell's Seed Co. says...
"More used than any other winter radish. Grows larger than the Spanish varieties. Very handsome, of medium size, rose color. Flesh white and mild for a winter radish. By packing these in sand, crisp, fresh radishes may be had all winter. Very fine cooked."

1/2 cup of radishes (the amount in a salad) has 15mg of Vitamin C!