underripe

Potatoes, underripe, green potatoes are unfit for food; they contain a poisonous substance which renders them actually harmful.

Wild grapes are preferable, but underripe Concords, Catawbas, and other varieties may be used.

Use no water with cultivated grapes, but with underripe wild grapes, cup of water may be added to each quart of stemmed grapes.

Select firm, slightly underripe fruit that is fairly acid and contains a large amount of pectin.

Fruit that is just a little underripe contains more pectin than the mature or overripe fruits.