Neanotis oxyphylla

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Neanotis oxyphylla (Wall. ex G.Don) W.H.Lewis,  Ann. Missouri Bot. Gard. 53: 39 1966. (syn: Anotis oxyphylla (Wall. ex G.Don) Wall. ex Hook.f.; Oldenlandia oxyphylla Wall. ex G.Don);
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Assam; Bangladesh; East Himalaya as per POWO;
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Wall. Cat. 6193 (Hedyotis) ; glabrous, root perennial, stem stout erect, leaves petioled linear-lanceolate, stipules long lanceolate simple toothed or laciniate, cymes terminal subcorymbose many-flowered, peduncles and pedicels erect, calyx-teeth short broad, capsules pedicelled turgid hemispheric, cells 5-8-seeded. Oldenlandia oxyphylla, G. Don Gen. Syst. iii. 531.

KHASIA MTS. ; in marshy places, alt. 2-5000 ft., common. Stem 12-18 in.,

simple, rarely branched above, as thick as a goose-quill below, and rooting at the lower nodes. Leaves 4-6 by 1/4-3/4 in., tapering to the base, dark when dry ; stipules 1/2 in., base ovate, not connate, coriaceous, erect. Cymes much divided with slender erect peduncles and pedicels. Corolla pale lilac, much longer than the calyx-teeth.—Specimens from Griffith’s collection are marked as from Darjeeling, probably by mistake for Khasia.

(Attributions- IBIS Flora (FBI))
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Request for ID of herb : 12 posts by 4 authors. Attachments (4)

Request ID of a herb. Photographed in Cherrapunjee area, Meghalaya in September 2017;
Plant small, about 1 ft in height; lithophytic, growing on rocks at the stream edge under semi-shaded area; about 1500 msl

Rubiaceae member ?

Looks like Oldenlandia sps

Houstonia longifolia Gaertn.  ???

Did you check with the suggested id?

Two choices have been suggested. Both appear to be strong contenders. Couldn’t decide the closer one yet!!
I think does not match with images at Houstonia longifolia (long-leaved bluet): Go Botany
I haven’t worked on this yet..
Could not find any match as per comparative images at Hedyotis.

Nothing looks matching Hedyotis, Oldenlandia and Neanotis!
Tried almost all species !

I agree with Oldenlandia or Hedyotis only, need to check with local floras,

Any chance it may be Neanotis oxyphylla (G.Don) W.H.Letois?

I guess it is matching Neanotis oxyphylla (Wall. ex G.Don) W.H.Lewis

 

 

 

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References: POWO  Catalogue of Life  The Plant List Ver.1.1  WCSP  IPNI  GBIF (High resolution specimens) High resolution specimen  High resolution specimen 2  India Biodiversity Portal  IBIS Flora (FBI)