I don't want to misdirect, but my first thoughts lead me to spurges such as Euphorbia hirta. That particular herb has a similar appearance but the leaves are serrate while yours are entire, I think. Plus, it is native to the Phillippines. Did you touch it or smell it?
Sorry I didn't smell it. Probably touched it but have no recollection of it. I am sure it is not Euphorbia hirta, although that is found in parts of India. But thank you thanrose for the suggestion. http://www.flowersofindia.net/catalog/slides/Asthma Weed.html The veins on the Indian mystery plant are not central to the leaf, making one side wider than the other. The leaves also curved downwards giving a very distinct attractive appearance. The whole plant was gently curved downwards. It had no terminal single leaf, always in pairs at the growing tip..... see below for correction. Leaves are alternate! Flowers pink/ lilac in colour, too small on pics to see any floral detail.
Very true. Thanks for the correction Andrey. I should have spotted that they appear lined up one behind the other, so cannot be in pairs! Duh!!!
I think you may be on to something with Elatostema! I fear that I will not get any further, as according to the Plant list there are 669 species. Quote..... "The Plant List includes 669 scientific plant names of species rank for the genus Elatostema. Of these 512 are accepted species names." http://www.theplantlist.org/browse/A/Urticaceae/Elatostema/ Many thanks for your help.
Possibly E. platyphyllum, at least that's what I ended up with using the key in Flora of Bhutan. Did you photograph any Liliaceae?
That is so kind of you paion, to use the key to try and pin it down further. I will check E. platyphyllum out now. They had had a cold, late ending winter, so sadly we were there too early for most small plants such as lilies. Some Arisaemas were up, and masses of Primula, but little else. Heavy snow had even delayed the Rhododendron flowers... very sad. So instead, it was fun to concentrate on many new( to us) trees and shrubs.
Please feel free to post the Primulas! ;-D I was hoping you might have seen some Polygonatum, Nomocharis or Lilium oxypetalum, have been thinking of visiting the area myself but ended up booking tickets back to China instead.