Rumex acetosella
Description: These plants are seldom more than 30 centimeters tall. They have alternate leaves, often with arrowlike bases, very small flowers, and frequently reddish sterns.
Habitat and Distribution: Look for these plants in old fields and other disturbed areas in North America and Europe.
Edible Parts: The plants are edible raw or cooked.
CAUTION:
These plants contain oxalic acid that can be damaging if too many plants are eaten raw. Cooking seems to destroy the chemical.