Vallisneria natans ?

Vallisneria natans (Lour.) H.Hara, J. Jap. Bot. 49: 136 1974. (Syn: Physkium natans Lour.; Vallisneria americana var. biwaensis (Miki) Lowden; Vallisneria asiatica Miki; Vallisneria asiatica var. biwaensis Miki; Vallisneria asiatica var. higoensis Miki; Vallisneria biwaensis (Miki) Ohwi; Vallisneria gigantea var. higoensis (Miki) Kitam.; Vallisneria higoensis (Miki) Ohwi; Vallisneria minor Ito; Vallisneria natans var. biwaensis (Miki) H.Hara; Vallisneria natans var. higoensis (Miki) H.Hara; Vallisneria physkium Juss. ex Spreng. [Illegitimate]; Vallisneria spiralis f. minor (Ito) Makino; Vallisneria spiralis var. subulispatha Makino; Vallisneria spiraloides Roxb.; Vallisneria subulispatha (Makino) Koidz.) ?;

 

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aquatic plant for ID 040311AMS1: Aquatic plant from bhopal lake 

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– Vallisneria spiralis most probably. 

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– Or perhaps V. natans, as V. spiralis probably does not grow in India

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– Vallisneria spiralis is found in India as well as V. natans [Reference: Govaerts et al. 2011: Kew’s checklist)
My contention was based on the spiral stalks present below the flower, if that is not a unique character, then I may be wrong.

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– I would be happier if both species grow in India. My information says that V. spiralis does not grow in Asia and the specimens identified as such belong to V. natans. By the way spirally coiled female stalk is the generic
character and not unique to any species.

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References:

The Plant List Ver.1.1
 WCSP