Lobelia species ?- Savandurga Hill, Karnataka

IdentificationVST2 : 12 posts by 5 authors. Attachments (3)
Kindly identify the plant
Date/Time- 22 SEP 2019
Location-Place, Altitude, GPSSavandurga Hill, Karnataka 562201, 12° 55' 23.24'' N 77° 17' 43.48'' E. Altitude 1139
Habitat- Garden/ Urban/ Wild/ Type- Wild
Plant Habit-Tree/ Shrub/ Climber/ Herb- Shrub
Height/Length- 90 cm.
Leaves - In whorls
Flowers – Light purple. In the photo only buds are seen.

Lobelia species ?
To me looks different from comparative images at Lobelia 

Hygrophila sp. ?
I don't think it is Hygrophila
We should ask ... for more photos, including flowers and if possible, fruits
I am stumped. I have been looking at this since last one month or so and digging but nothing remotely comes up.
follow up photographs of the same or similar plants would be necessary
Did it flower ... ?

I may have to do another trek to Saavandurga to find out further development of the plant. I hope it will be soon.
Thanks for interest shown by all of you.