Quercetin 3-O-[6″-(3-hydroxy-3-methylglutaroyl)-glucoside]: first finding in nature Minor UV blockers include quercetin 7-O-glycoside, quercetin itself, kaempferol glycoside, and feruloyl ester. Edibility The stems are pleasantly acidic, and they are consumed by the local people, who call the plant Chuka. The hollow of the stem contains a good deal of limpid water. History A description of R. nobile was first published by Joseph Dalton Hooker and Thomas Thomson in 1855. Hooker wrote: "The present is certainly the most striking of the many fine alpine plants of Sikkim; and though in every botanical character, as also in the acid juice of the stem, a genuine Rhubarb, it differs so remarkably in habit and general appearance from any of its congeners, that at first sight it could not be recognized as one of them. I first saw it from a distance of fully a mile, dotting the black cliffs of the Lachen valley at elevation, in inaccessible situations, and was quite at a loss to conceive what it could be; not was it till I had turned back the curious bracteal leaves and examined the flowers that I was persuaded of its being a true Rhubarb." References Notes External links Plants For A Future Photos by Thomas Kornack nobile Flora of Tibet Flora of Myanmar Flora of the Indian subcontinent