Gonocarpus micranthus

Gonocarpus micranthus Thunb., Nov. Gen. Pl. 55 1783. (syn: Gonatocarpus micranthus (Thunb.) Willd.; Goniocarpus citriodorus A.Cunn.; Goniocarpus micranthus (Thunb.) K.D.Koenig; Goniocarpus rubricaulis Griff.; Haloragis citriodora (A.Cunningham) Walpers; Haloragis micrantha (Thunb.) R.Br. ex Sieb. & Zucc.; Haloragis tenella Brongn.); 

China (Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hebei, Henan, Hubei, Hunan,
Jiangsu, Jiangxi, Shandong, Sichuan, Yunnan, Zhejiang), Taiwan, India (Assam),
Malaysia, Vietnam, Ryukyu Isl., North Korea, South Korea, Japan (Hokkaido,
Honshu, Shikoku, Kyushu), Java, N-Thailand, N-Borneo, Sulawesi, Philippines
(Luzon, Mindoro, Negros, Mindanao), New Guinea, Bhutan, Sikkim, Australia
(Fleurieu Peninsula, South Australia, through Victoria, Tasmania and eastem New
South Wales to SE-Queensland), New Zealand (incl. Stewart Isl.), Chatham Isl. as per Catalogue of Life

Common name: Small-Flowered Raspwort, Small-Flowered Watermilfoil

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Herb for id from Shillong- NS January 2020::02 : 18 posts by 3 authors. Attachments (3) 

This minute herb was photographed from Shillong, Meghalaya in 2017.
The pics may be insufficient, but all I have are these pics only..
Any clues on identification will be appreciated….

Never came across this plant. No ideas on family either…flower looks different!!

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I searched my collection for any better views, but I have only these pics..

However, attaching the original pic, as desired..
Attachments (1) – 5 mb.

Looks like some Circaea sp. (Onagraceae). But we do not have this species in eFI.

Looked into Circaea species available in Flora of Pakistan and Checklist of Nepal, but flower structure looks different as per FOC illustration. 

Yes, I too have the doubt now. Circaea species have long flower pedicel with spreading hairs. I am not aware of this plant. 

Thanks, … To me looks different from Onagraceae family.

Appears to be from Lythraceae
But I could not find any match as per comparative images herein.
As per keys in Flora of China, may be some Rotala
But I am not finding any match as per comparative images at Rotala

This is Haloragis micrantha (Haloragaceae)

Thanks a lot …, it looks matching..!!

Thanks a lot, …

We were really stuck up on this for a long time.

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