10-30cm tall perennial herb that does sleep movements, closes its
leaves during nighttime. Stems crawl on the ground or underground to
expand and set 3 heart-shaped leaflets at the tips of long petioles.
The leaflets measure 1cm long. The flowers are yellow and
approximately 8mm in diameter. After flowers, peduncles face down
and set cylindrical capsules at the tips facing upward. The capsules
split themselves open and blow off many seeds as the capsules ripen.
Bloom time: May-July.