This species is found in Nepal (Gosainkund, Kanchenjunga and Everest) and Sikkim (Sandakphu), but also listed in the Flora of China as being in S Tibet. A robust species with often 2 whorls of purple-pink flowers with a yellow eye. Leaves with a long distinct petiole, heart shaped (cordate) base and usually heavily coated with meal below. Grows in dry crevices and cliff ledges. Compare with P. caveana (different leaf base), P. littledalei (leaf venation is more palmate, from Tibet) and P. baileyana (emarginate corolla lobes, smaller leaves, SE Tibet).
This species has had a history of naming problems. The entries of Wallich's numerical list are nomen nudum, but the name P. rotundifolia was validly published in Flora Indica in 1824. But Pallas had already used the name P. rotundifolia in 1776, and so Balakrishnan proposed the name P. roxburghii instead, however it is now generally agreed that Pallas's name was not valid. If P. rotundifolia Wallich is also not valid then the name P. cardiophylla I. B. Balfour & W. W. Smith 1916 is the prior valid synonym, and has been used by some authors. If you have an image of this species from Sikkim or Tibet, please contact the webmaster. 如果您有来自西藏这个物种的图片，请与网站管理员联系。