Euphorbia donii

Euphorbia donii Oudejans, Phytologia 67: 45 1989. (syn: Euphorbia longifolia D.Don [Illegitimate]; Tithymalus longifolius Hurus. & Yu.Tanaka);

Images by Anurag Sharma - Id by N.P.Balakrishnan, (inserted by Bhagyashri Ranade)

Family: Euphorbiaceae
Date: 26th May 2015
Place: Churdhar Sanctuary, Himachal Pradesh
Habit: Herb
This appears to be Euphorbia donii Oudejans (E. longifolia Buch.-Ham. ex D.Don, non Lam. 1788), which is common from W.Himalaya to Nepal and Bhutan.
However, let ... study live plants with reference to the description and illustration given in Revision of genus Euphorbia in India (2010, page 254)