Thanks Mani ji and Satish ji for the beautiful pictures. Respondig to Dr. Gurcharan ji's query - I would like to state the following reference I did
for Hygrophila schulli. Dr Almeida's flora Vol IV A ,pg :51 has given the valid name for the pictures posted as Hygrophila schulli ( Buch.-Ham) Almeida & Almeida. Published in Journal of Bombay natural history society. 83 (suppl.) 221, 1986. One of the synonym being H. auriculata (Sch.) Heine. Published in Kew Bull. 16:172,1962.
As mentioned by Sir, Kew plant list considers Hygrophila schilli (Buch.-ham) Almeida and Almeida as valid. The morphological detailed description in the flora completely matchedsthe plants posted. The most prominent charactersitics being that of sharp yellow spines 2.5- 4 cm long in the leaf axils. Flowers in whorls of 8 ( in 4 pairs) at each node, bracts about 2.5 cm long, like the leaves, lanceolate, hairy and ciliate....corolla purple -blue....
regards,
Rashida.