[efloraofindia:121763] help to identify the species of this mussaenda please..

[Mr. Joby Joseph]

Is it mussaenda roxburghii or other species?
Habit:- shrub
Locality: Kottayam, Kerala
Longitude:- 76.46.12.00
Latitude:-9.43.32.400
altitude:- 156meters MSL
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