A delicate dwarf biennial, efarinose and with divided pinnatisect leaves. Compared to other species in this section, the leaves are smaller and have only 1 or two pairs of lateral segments when pinnatisect. Compared with closely related P. ranunculoides, it differs by long-homostylous flowers, pedicels and calyces densely covered in short glandular hairs, a relatively short calyx (ca. 1/3 of tube) with slightly spreading lobes (not reflexed) and only occasional apical bulblets. Only known from a single population at Tanjia Yuanzi, Shihui, Qianjiang District, Chongqing.