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Andaman Is., Hainan, India, Nicobar Is., Sri Lanka, Vietnam as per POWO;
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China (Hainan), peninsular India, Sri Lanka, Andamans (Little Andaman Isl.), Nicobars (North Nicobars, Central Nicobars) as per Catalogue of Life (Dicliptera manilalii Karthik. & Moorthy)
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Acanthaceae fortnight ANMAR22/57 Dicliptera Montana : 1 post by 1 author. Attachments (10)
Family: Acanthaceae
Date: 21st March 2015
Place: Aralam WLS, Kerala
Habit: Herb
Habitat: Evergreen forest

How to differentiate it from Peristrophe paniculata ? ………I do not see image of flowering axis.


This thread shows very different picture for same species


This was identified for me by … at the time. And I did not have time to observe this species closely at the time as I was part of a butterfly survey there.
The other taxon mentioned by …- Peristrophe montana Nees seems to be distinct from Dicliptera montana Lindau.
The former is mentioned in the following floras and the descriptions are as follows-
Flora of Palghat– Erect herbs; leaves elliptic, acuminate; flowers pale pink, in cymes, bracts 2, conspicuous, leafy, elliptic, glabrous/sparesly hairy; corolla tube twisted; filaments pubescent.
Flora of Cannanore (Kannur, the district in which this plant was clicked)- erect undershrub; leaves elliptic, acuminate; flowers pink, in axillary and terminal cymes.
Illustration.
I do not think I have clicked all the details of the plant, I do not have the features of the calyx and the inflorescence of the plant was still young.

Further Dicliptera montana Lindau is not found in India as per Tropicos & efi page

Looks very close to Stinking Foldwing, Dicliptera foetida Dicliptera zeylanica
Top Slip, Tamil Nadu,
Habitat – Near the river
06 Dec 2009

Most probably species of Peristrophe of Acanthaceae family. Kindly upload a picture of branch with leaves.

It is Peristrophe montana

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393 ID wild plant: 15 high res. images.
Please ID wild plant,
Location: near Vannappuram, Thodupuzha, Idukki Dist., Kerala PIN:685607
Altitude: 1500fsl
Flower date: 08NOV2022, 12.35pm
Habitat: wild moisture, hilly shady roadside
Plant habit: shrub, erect obliquely, branches, weak semi fleshy cylindrical stem 07mm base diameter, annual
Height: 02 feet
Leaves: opposite, elliptic, acute, shiny, soft, glabrous, size upto:15×8cm
Flower: terminal/axillary racemose, size:13x13x7mm, pink, non fragrant
Fruit:
Seed: 

Camera: CANON EOS1500D +FL10x


Dicliptera sp.


Yes it is Dicliptera sp. dear …, thank you very much for the Genus ID,


Dicliptera baphica Nees  syn : Dicliptera manilalii Karthik. & Moorthy


Yes it is Dicliptera baphica, dear …, thank you very much for ID my plant,



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References:

POWO  Catalogue of Life (Dicliptera manilalii Karthik. & Moorthy)  The Plant List Ver.1.1  Tropicos  Flora of China (Peristrophe montana Nees) India Biodiversity Portal  Flora of Peninsular India (Dicliptera manilalii Karthik. & Moorthy)  GBIF