Justicia trinervia

Justicia trinervia Vahl, Enum. Pl. 1: 156 156 1804. (Syn: Adhatoda trinervia (Vahl) Nees; Dicliptera trinervia (Vahl) Juss.; Nicoteba trinervia (Vahl) Lindau);
Three Nerved Squirrel Tail • Marathi: लहान् अडुलसा Lahan Adulsa, Sut;
J. trinervia and J. betonica are two distinct species: the former is generally a low-lying procumbent herb with narrow leaves, whereas the latter species is a taller, erect herb/subshrub/shrub reaching 2 m high, with ovate-lanceolate leaves. (nevertheless, the bracts are similar-looking: scarious with green nerves in both the species); 

Images by J.M.Garg (Validated by Shrikant Ingalhalikar & Vijayasankar Raman) (Inserted by J.M.Garg)

Justicia trinervia? - indiantreepix | Google Groups : 8 posts by 3 authors. Attachments (3)
On 17/8/08 in Talakona forest, AP. Here is a link for its drawing & synonyms:
It could be Justicia adhatoda locally called Adulsa
Thanks, ..., for the feedback.
It (Justicia adhatoda) is stated to be a 1-3 m high, branched shrub. But my posted plant is a low prostrate herb with small leaves compared to 10-20 cm size leaves for Justicia adhatoda. Here is a Wikipedia link for Justicia adhatoda: http://en.wikipedia.org/wiki/Justicia_adhatoda
Yes, it looks to be J. trinervia but the season does not tally. I am not aware if this plant occurs in AP.
For me also this looks like Justicia trinervia, owing to the narrow leaves and linear spikes.
In J. nilgherrensis, a high altitude species with stout rootstock, the bracts larger (0.5 inch or more long) whereas in this sp it is just half of it.
Pl. also refer key provided by Gamble (Fl. Madras 2: 1075) for more clarity.
I am attaching the photos for the confirmation of ID.
Justicia nilgherrensis (Acanthaceae)
Habit: A procumbent herb with a woody stem and rootstock.
Place: Shervaroyan Hills, Salem Dist., Tamil Nadu.
DoP: 18-04-2014.

Another confusingly similar species is Justicia trinervia
Pl. check its differences from Justicia nilgherrensis
To me most likely your id is correct.  

yes, it is Justicia trinerva only