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!Hydrilla verticillata (L. f.) Royle Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: Illustrations of the Botany ... of the Himalayan Mountains ... 1: 376. 1839. (Ill. Bot. Himal. Mts.) Name publication detailView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Contributor Text: ABDUL GHAFOOR
Flower/Fruit: Fl. Per.: October-January.
Type: Lectotype: “Habitat in India”, Herb. Linn. 1106. 1 (LINN).
Distribution: Distribution: Gregarious in ditches, pools, lakes, wet ricefields and slow-running water streams in S.E. Europe, Africa, Asia and Australia from sea level to 6000'; introduced in America and elsewhere.
Comment/Acknowledgements: The plant is eaten by some fresh water fish and may be used as manure wherever it occurs in large quantities. It becomes a serious menace to navigation in large lakes and in irrigation canals as it reduces the rate of flow of water.
Illustration: Hydrilla verticillata (L. f.) Royle (Illustration)
Map Location: B-6 Peshawar valley, Akbarpura, Pang Tireth, fresh clear water, large natural pond, small ponds, abundant, amphibious, Bashir Ahmed Suhail 204 (K); B-7 Swat, near Saidu Sharif Village, c 3500 ft., among cultivated valleys and hills of sparse vegetation, R.J. Rodin 5432 (K); B-8 Kashmir, Srinagar, Dal Lake, 5200 ft., C.R. Lancaster 31 (BM); Kashmir, Shalimar, Dal Lake, 5500 ft., R.R. Stewart 3210 (K); Kashmir, Oct. 1848, T. Thomson s.n. (K); Kashmir, environs of Srinagar, within a circle of 8 miles radius, 2 to 20 October, 1856, Schlagintweit Cat. No. 4606 (BM); Kashmir Lake, 5500 ft., Aug. 1921, R.R. & I.D. Stewart s.n. (RAW); Dal Lake Srinagar, 5000 ft., still water in lake, F. Ludlow & G. Sheriff 6 (BM); Kashmir, Manasbal, 5200 ft., 25.6.1940, in 2-5 ft. of still water, Ludlow & Sheriff 7677 (BM); C-7 Jhelum Dist. (Salt Range), Kotas Raj Spring, ± 2000 ft., E. Nasir & M.A. Siddiqi 4349 (K; BM); Rawalpindi, Oct. 1871, J.E.T. Aitchison 543 (K); D-8 Lahore., 1000 ft., Sept. 1846, T. Thomson s.n. (K); F-4 Dadu Dist.: Mancher Lake, abundant in water all over with Pota¬mogeton sp & Ceratophyllum sp. S.M.H. Jafri 2621 (KUH); c. 4 miles from Sehwan on way to Dadu, in a pond, submerged, white flowers floating on surface of water, Kamal Akhter Malik et al 2132 (KUH); Ad Lacum Munchar, Sind, Stocks (BM); Lake Munchur, Stocks 1197 (K); Scinde, Stocks (K); G-4 Dhabeji, in water stream below the bridge, common, S.M.H. Jarfi 2436 (K); Chilya Bund, Thatta, submerged 15.4.1964, S.I. Ali s.n. (KUH); Jangshahi, Haleji Lake, common in water, S.M.H. Jafri 1609 (KUH); Jam branch canal 4 miles from Gharo, Ghulamullah Road, common, 7.6. 1976, K. Aziz s.n. (KUH); In Dand Lake, Chach Jehan Khan, floating in water, A. Ghafoor 891 (KUH); water tank near Botany Department, Karachi University Campus, 2.2.1963, Miss Khush Gul s.n. (KUH).

 

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Caulescent, glabrous, profusely branched freshwater herb with 5-50 mm long internodes and fibrous roots at some nodes. Leaves oblong-linear to lanceolate, (8-) 10-40 (-50) mm long, (1-) 2-3 mm wide, green, margin serrate-dentate, apex acute-apiculate; nodal scales 2, axillary, membranous with orange brown cilia on margin. Male spathe 1.25-1.50 mm long, bursting open to liberate male flower, beset with subulate appendages. Male flower: sepals reflexed, 1.5-3 mm long; petals linear-spathulate, equalling the sepals, patent or reflexed, obtuse; stamens with minute filaments. Female spathe c. 5 mm long, reddish-brown striped, bidentate. Ovary oblong, 3.4 mm long, with 1.5-10 cm long slender rostrum. Fruit ± terete. 5-7 mm long. Seeds dark brown, c. 2.5 mm long.
 
 
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