Volume 7 > Part 3 > Year 2001 > Page 373 > Hydrocharitaceae > Hydrilla

Hydrilla verticillata (L.f.) Roylewfo-0000769366

Ill. Bot. Himal. Tab.: 376, 1839; Hook.f., Fl. Brit. Ind. 5: 659. 1888; Gagnep., Fl. Gén. L-C. 6: 4. 1908; Hartog, Fl. Mal. I, 5: 385. 1957; Cook & Lüönd, Aquatic Bot. 13: 485, f. 1, 2. 1982.— Serpicula verticillata L.f., Suppl. Pl.: 416. 1782. Fig. 10.

Accepted Name : This is currently accepted.

Description : Rhizomes and erect stems with turions; subterranean turions appearing as tubers, cream-brown, surface smooth; turion from erect stems olive-green, covered with short, stiff scales. Leaves 8–15(–20) by 1.2–4 mm, serrulate. Inflorescence with spathe of 2 united bracts. Flowers solitary in a spathe; staminate pedicels ca 0.5 mm long; carpellate flowers with hypanthium 10–50 mm long; ovary unilocular.

Thailand : NORTHERN: Mae Hong Son, Chiang Mai; SOUTH-WESTERN: Ratchaburi.

Distribution : As the genus (type from India).

Ecology : Fresh or brackish waters of lakes, streams, rivers, bayous, rice fields, swamp, up to 2,000 m alt.

Vernacular : Phak khi tao (ผักขี้เต่า)(Nakhon Ratchasima); sarai hang krarok (สาหร่ายหางกระรอก)(Central).