Hi Dinesh ji,
Given below are the relevant key characters from Flora of India:
a. Stems not winged ---> Sphaeranthus amaranthoides
b. Stems winged:
b-i) wings entire; flower-heads <1 cm across ---> S. africanus
b-ii) wings toothed; heads up to 2.5 cm across; leaves single-dentate
---> S. senegalensis
So, your plant seems to be *S. senegalensis*, pl. confirm.
In S. indicus, the leaves are double-dentate.
2009/12/1 Dinesh Valke <[email protected]>
> Dear friends,
>
> Would like to know whether this is *Sphaeranthus africanus* OR yet *S.
> indicus*.
>
> Place: Vaghbil, Thane.
> Date: 28 NOV 09
> Habitat: near creek
>
> Regards.
>
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With regards
R. Vijayasankar
FRLHT, Bangalore
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