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Rotala densiflora (Roth) Koehne, Engler’s Bot. Jahrb. 1:164. 1881. Pol. and Rech. f., l.c. 9.
Ammannia densiflora Roxb.
Annual herb, erect, 12-22 cm tall, glabrous. Leaves ovate-lanceolate or linear-lanceolate, rounded at the base, 2-16 mm long, 1-3 mm broad. Inflorescence solitary, axillary, in every axil. Flowers 3 mm long, 5-merous. Bracteoles subulate, ± equalling the flower. Hypanthium campanulate, membranous in fruit. Epicalyx subulate-filiform. Petals ovate-oblong, oblong, obovate or elliptic, acute, obtuse or retuse. Ovary ± 3-angled. Style 0.5 mm long. Capsule 2-3 mm long, 1.5-2 mm broad, 3(-4)-valved. Seeds plano-convex or ± obovate.
Fl. Per.: September.
Type: Described from India.
Distribution: East Africa, tropical and subtropical Asia, Australia.
Rice fields and other wet places. Reported from 300-2000 m.
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