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lanceleaf water plantain, Narrow leaved water plantain;
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Macaronesia, NW. Africa, Europe to China (as per WCSP)
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Alisma lanceolatum is a species of aquatic plant in the water plantain family known by the common names lanceleaf water plantain and narrow-leaved water plantain.[2] It is widespread across Europe, North Africa and temperate Asia. It is naturalized in Australia, New Zealand, Oregon, California and British Columbia. It is considered a noxious weed in some places.[3][4][5][6]

It is found in mud and in fresh waters.

This is a perennial herb growing from a caudex in the water or mud. It produces lance-shaped leaves 12 to 20 centimeters long and 4 wide on long petioles; leaves which remain submerged in water are smaller and less prominently veined. The inflorescence is mostly erect and up to half a meter tall.

It is a wide array of small pink-petalled flowers, which open in the morning, from June until August. The fruit is a tiny achene up to 2 or 3 millimeters long clustered into an aggregate fruit of about 20 units.

The water plantain Alisma plantago-aquatica has acute leaf tips not tapering to a stalk.[7]

(from Wikipedia on 8.1.16)

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Alisma lanceolatum from Kashmir : 2 posts by 2 authors. Attachments (3)

Alisma lanceolatum from Kashmir, growing in ditches and ponds in the valley. Photographed near Pattan on June 19, 2010.


Nice catch Sir Ji!!
A tentative description and Illustration of the plant from Flora of Pakistan
Description: http://www.efloras.org/florataxon.aspx?flora_id=5&taxon_id=222000006
Illustration: http://www.efloras.org/object_page.aspx?object_id=115713&flora_id=5