Begonia hatacoa

Begonia hatacoa Buch.-Ham. ex D.Don, Prodr. Fl. Nepal. 223 1825. (syn: Begonia hatacoa var. rubrifolia Golding & Rekha Morris, without type.; Begonia hatacoa var. viridifolia Golding & Rekha Morris, without type.; Begonia rubrovenia Hook.; Platycentrum rubrovenium (Hook.) Klotzsch);

Assam; Bangladesh; East Himalaya; Myanmar; Nepal; Thailand; Vietnam as per Catalogue of Life;

Rhizomatous. Stems 10-30cm. Leaves ovate-lanceolate, 7-15×3-7cm, acuminate, base ± obliquely rounded, scarcely cordate, margin subentire or ± distantly dentate, pubescent on veins beneath; petioles 3-12cm; stipules ovate, up to 20x10mm, acuminate, persistent. Peduncles c 10cm, bearing a few flowers terminally; bracts similar to stipules. Outer perianth segments ovate, c 10x7mm, inner ones c 6x4mm, pink or white, streaked pink. Stamens numerous; connective produced. Capsule c 12x6mm, becoming reflexed, largest wing oblong, c 15x10mm.

Fl. May-October.

Wet, rocky river banks and shaded forests

(attributions- A.J.C. Grierson & D.G. Long. Flora of Bhutan. Published by RBGE. 1991 from Bhutan Biodiversity Portal)
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MS Jan.,2018/05 Begonia sp. for ID : 9 posts by 3 authors. Attachments (2)
Location : Tamdil, Mizoram

Date : 16-07-2016

Habit : Herb

Habitat : Wild

Begonia hatacoa ?

Yes looks like this..
The underside of leaves in this case was purple..

Pl. also check with the link of Monograph of NE Indian species, the link of which I sent you

Yes, I will also go with … for Begonia hatacoa as per the following:

https://species.wikimedia.org/wiki/Begonia_hatacoa

http://botanyphoto.botanicalgarden.ubc.ca/2013/02/begonia-hatacoa/

http://www.glasshouseworks.com/begonia-hatacoa-silver-hyb

flowersofindia
http://www.efloras.org/florataxon.aspx?flora_id=110&taxon_id=242420705.

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Fwd: Begonia for identification from Arunachal : 4 posts by 2 authors. Attachments (3)
Please find attached herewith some images of Begonia hatacoa, recorded from Arunachal Pradesh, for addition to our database.

Thanks, …, for wonderful addition along with those of …

B. hatacoa for sure

Images by Saroj Kumar Kasaju, (For more photos & complete details, click on the links)

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Begoniaceae : Begonia megaptera A. DC. : 3 posts by 3 authors. Attachments (5).

Date: 23 Jul, 2014

Location: Dolakha Nepal

Altitude : 5000 ft.
For validation.

From whatever little I know, it does look like Begonia megaptera. We have Begonia picta and Begonia dioica growing commonly here in Dharamshala at this height, but I haven’t yet seen any megaptera.