Adenosma indiana (Lour.) Merr., Trans. Amer. Philos. Soc. n.s., 24(2): 351 1935. (Syn: Adenosma buchneroides Bonati; Adenosma capitata (Benth.) Benth. ex Hance; Adenosma capitata var. spicata Bonati; Manulea indiana Lour.; Manulea indica Willd.; Pterostigma capitatum (Benth.) Benth.; Pterostigma spicatum Benth.; Stemodia capitata Benth.; Stoechadomentha capitata (Benth.) Kuntze);
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Tropical & Subtropical Asia: Assam, Bangladesh, Borneo, Cambodia, China South-Central, China Southeast, East Himalaya, Hainan, India, Jawa, Laos, Malaya, Myanmar, Nepal, Philippines, Sri Lanka, Thailand, Vietnam, West Himalaya as per POWO;
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Erect herbs; stem up to 45 cm tall, densely villous. Leaves opposite or whorled, 2-3.5 x 1-2 cm, ovate to elliptic-ovate, base rounded, margin serrate, apex acute, hairy on both sides, lateral nerves 6-8 pairs, sessile. Flowers in dense, terminal bracteate cylindric heads, 1.5-3 cm long; bracts linear. Calyx-lobes 5, 3-4 mm long, lanceolate, ciliate, upper largest. Corolla bluish or violet; tube c. 5 mm long, cylindric, upper lip erect, 2-fid, lower spreading, 3-lobed. Stamens 4, didynamous; anther cells stipitate. Ovules many; style filiform below, dilated above; stigma 2-fid. Capsules 3-4 x 2-2.5 mm, ellipsoid. Seeds c. 0.5 mm long, ovoid-oblong, reticulate.
Flowering and fruiting: June-October
Grasslands, deciduous and semi-evergreen forests
(Attributions- Dr. N Sasidharan (Dr. B P Pal Fellow), Kerala Forest Research Institute, Peechi as per India Biodiversity Portal)
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Plants from Assam Dec 2018 : 8 posts by 3 authors. Attachments (5)- 1 Mb each.

Attached images are plants from Assam. Please ID the species.
Date :15.12.2018
Location: Assam

Family : Acanthaceae/Lamiaceae (?)
Genus & species : ??
Habitat: Grows wild on open sunny places
Habit :  Herb

Flower : Blue

Appears to be some Acanthaceae member. 


Pl. check comparative images at 


Could not find a match as per comparative images at Acanthaceae.

Can it be from Verbenaceae ?

Lamiaceae?

It may be Neuracanthus sp. (Acanthaceae)


Looks more like an Acanthaceae member to me. But an unfamiliar spp.


Adenosma indiana (Lour.) Merr.


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