Skimmia laureola subsp. multinervia

Skimmia laureola subsp. multinervia (C.C. Huang) N.P. Taylor & H.K. Airy Shaw (syn: Skimmia kamengensis A.K. Goel & B.N. Mehrotra; Skimmia melanocarpa Rehder & Wilson (synonym); Skimmia multinervia Huang);

India (West Bengal, Darjeeling, Manipur, Nagaland, Arunachal Pradesh), Sikkim, Bhutan, Myanmar [Burma], Vietnam, China (Yunnan, Sichuan), Bhutan, Nepal as per Catalogue of Life
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Arunachal Pradesh 
Altitude-2500m amsl

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Tandin Wangchuk said it to be Skimmia of Rutaceae.
Yes, very likely to be Skimmia sp.
It may be Skimmia japonica.. I am not sure.
If we go by the keys & distribution in BSI Flora of India, it may be S. laureola subsp. multinervia