Rotala densiflora

Synonym: Rotala indica
English: Indian toothcup.
Region: Southeast Asia, India; introduced in Congo, Italy, Portugal, California Louisiana.
Habitat: aquatic.
Use: popular aquarium.
Culture: weed of rice fields.BotanyAquatic plant.
Stems: 30 or 40 cm long.
Leaves: decussate; opposite, perpendicular pairs; oval; with thick, whitish, cartilaginous margins; to 2 cm long.
Inflorescences: singly or in short spike like.
Flowers: axillary; sepals 4, triangular; petals 4, tiny, pink.