This section is from the book "A Manual Of Weeds", by Ada E. Georgia. Also available from Amazon: A Manual Of Weeds.
Native. Annual. Propagates by seeds. Time of bloom: July to September. Seed-time: Late August to November. Range: Pennsylvania to California, southward to Florida and Mexico. Habitat: Sandy soils; fields, meadows, pastures, waste places.
Frequently cultivated at the North, but in the Southern States often obnoxiously plentiful as a weed. Stem slender, angled, hairy, decumbent at base, widely branching, seldom rising more than a foot above the ground but often extending for a yard or more in all directions. Leaves thin, long ovate, pointed, wavy-edged or entire, rounded or abruptly narrowed at base, the veins and petioles usually hairy. Flowers less than a half-inch broad, pale yellow with brown-spotted throat, the five-lobed calyx at first short and hairy but becoming thin, membranous, and nearly smooth as it enlarges and envelops the growing fruit; the more prominent ribs form a ring of small knobs around its peduncle. The berry within is yellow, about a half-inch in diameter, not sticky like that of the Tomatillo, but more pleasant to the taste, being slightly acid.
Means of control the same as for the preceding species.