This species was found once in the Delei (Talley) Valley by Kingdon-Ward though it was in cultivation for several years after. It was initially compared with P. morsheadiana (P. prenantha) with the distinction of being a more robust plant with an annulate corolla. The plant is efarinous, leaves oblong, round at the apex, broadly winged petiole and minutely denticulate margin. The flowers are yellow, drooping, with a tube slightly longer than the calyx. Initial reports thought this species to be homostylous, but new information shows that it is heterostylous. The scape may be up to 35cm and there may be 2-3 whorls (superimposed umbels) of flowers. Compare with related species P. brachystoma, P. prenantha subsp. morsheadiana.