In Franchet's description, he failed to point out the most noticable characteristic of this species: the flowers are bicolored, yellow with a white border on the petals (He described them as yellow only). However some of the specimens of Delavay 111 from August 4, 1884 do have this noted on the label. Franchet also compared this species to P. japonica in Bull. Soc. Bot. France 33:68. 1886. and incorrectly gives the flower color as purple. This lead to some confusion and so we have collections by Henry and Pratt being described as P. japonica and then later combined by Pax with Delavay 111 as P. serratifolia (see references above). This also lead Forrest to believe he had found a new plant at Delavay's location and so described the species P. biserrata. This is fortunate because the name "Primula serratifolia" had been used earlier by Gandoger to describe a form of P. auricula from France and so Franchet's name becomes a later homonym and therefor invalid, so Forrest's name stands as the correct one for the species.
The type was collected on the Cang Shan near Dali, Yunnan, but it is distributed westwards through to Northern Burma (Myanmar). P. biserrata is efarinose with oblong to obovate leaves with a round apex and irregularly dentate margins. The scapes may produce one or two umbels of 5-10 flowers. The calyx is ribbed, cut to the middle into triangular lobes, apiculate at the tip. The last two images are from the western part of the distribution. If you have more images of this species from the western part of its range, please contact the webmaster.