Botany
Kogon-lake is a grass, much larger and taller than kogon (Imperata cylindrica). Stem grows up to 2 meters high. Leaves are larger and longer than kogon. Panicles are 30 to 45 centimeters long.

Distribution
- Similar in habitat to Imperata cylindrica (Linn.) Beauv. var. Koenigii, but much less common.
- Occurs from central Luzon to Palawan and Mindanao.
- Also occurs from Java to the Moluccas.

Parts used
Fresh roots.

Uses
Folkloric
- Decoction of fresh roots taken internally for diarrhea due to indigestion.
- Decoction of roots with sugar prescribed for gonorrhea.

Availability
Wild-crafted.