Gabing-uak
Monochoria vaginalis Presl.

Other scientific names  Common names
Pontederia vaginalis Burm. Biga-bigaan (Tag.)
Monochoria ovata Kunt. Bil-lagut (Ilk.)
  Gabi-gabi (P. Bis., C. Bis.)
  Gabing-uak (Tag.)
  Hahalung (If.)
  Hakhaklung (If.)
  Kalabua (Tag.)
  Lagtang (Bik.)
  Lapalapa (Ilk.)
  Saksaklung (Ig.)
  Saksakong (Bon.)
  Upi-upi (Bik.)

Botany
Smaller than gabi-gabihan (Monochoria hastata). Rootstocks are short, suberect or creeping. Leaves are variable, long-petioled, linear to ovate, oblong-ovate to broadly ovate, with a sharply acuminate apex and cordate base. Petioles are usually less than 30 cm. Infloresences are few, 3-6 cm long. Flowers are blue, about 1 cm long, pedicles less than 1 cm long. Capsules are oblong.

Distribution
In low and medium altitudes, in open wet places, rice paddies, etc.

Parts utilized
Leaves, roots.

Uses
Folkloric

Leaves are poulticed after boils have burst.
Juice of roots for stomach and liver problems, asthma and toothace.
Others
Tubers and leaves are eaten, raw or cooked.

Availability
Wild-crafted.