with, the Common White. The bulbs are
pale-green, attain a very large size, and the variety is hardy and
productive. Not suited to garden culture, but chiefly grown for
farm-purposes.

PURPLE. _Thomp._ _Vil._

This variety differs little from the White, except in color; the bulb
being purple, and the leaf-stems and nerves also tinged with purple.
Like the White, it attains a large size, and is only adapted for field
culture; the flesh being too coarse and strong-flavored for table use.

WHITE. _Thomp._ _Vil._

Bulb large,--when full grown, measuring seven or eight inches in
diameter, and weighing from eight to ten pounds; leaves rather large and
numerous; skin very pale, or whitish-green; stem about six inches high.
Hardy, very late, and chiefly employed for farm-purposes.

The variety should be cultivated in rows eighteen inches apart, and the
plants should stand one foot apart in the rows.

* * * * *

OXALIS, TUBEROUS-ROOTED.--_Law._

Tuberous-rooted Wood-sorrel. Oca. Oxalis crenata.

Of the Tuberous-rooted Oxalis, there are two varieties, as follow:--

WHITE-ROOTED.

Oca blanca.

Stem two feet in length, branching, prostrate or trailing, the ends of
the shoots erect; leaves trifoliate, yellowish-green, the leaflets
inversely heart-shaped; flowers rather large, yellow,--the petals
crenate or notched on the borders, and striped at their base with
purple. The seeds are matured only in long and very favorable seasons.
In its native state, the plant is perennial; but is cultivated and
treated, like the common potato, as an annual.

_Cultivation._--The tubers should be started in a hot-bed in March, and
transplanted to the open ground in May, or as soon as the occurrence of
settled warm weather. They thrive best in dry, light, and medium fertile
soils, in warm situations; and should be planted in hills two feet and a
half apart, or in drills two feet and a half apart, setting the plants
or tubers an inch and a half deep, and fifteen or eighteen inches apart
in the drills; treating, in all respects, as potatoes.

The tubers form late in the season; are white, roundish, or oblong,
pointed at the union with the plant, and vary in size according to soil,
locality, and season; seldom, however, exceeding an inch in diameter, or
weighing above four ounces. The yield is comparatively small.

_Use._--The tubers are used as potatoes. When cooked, the flesh is
yellow, very dry a