茳芏(原亚种) jiang du (yuan ya zhong)

Apicalmost leaf with an elongated blade. Basal involucral bracts longer than inflorescence, spreading. Glumes slightly incurved. Fl. and fr. Jun-Oct.

River margins, ditch margins (usually cultivated); below 100 m. Hainan, Taiwan [India, Indonesia, Japan, Malaysia, Myanmar, Nepal, Pakistan, Papua New Guinea, Philippines, Sri Lanka, Thailand, Vietnam; SW Asia, N Australia].