This is Strobilanthes barbatus of Acanthaceae family. Flowers once in
7 years.
I doubt stem of S. ixiocephalus has wings or even quadrangular!
Another distinguishing character for these two species;
stem glabrous - S. barbatus
stem hairy- S. ixiocephalus
I am not familiar with S. neesianus/ (I think S. neesiana).
Regards
Giby
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