Primula sect. Ranunculoides, F. H. Chen, 1948

Zhang, Chao, Zhang, Jian-Ye, Chen, Fang-Ming, Chen, Wen-Hao, Chen, Dong-Sheng & Shao, Jian-Wen, 2020, Primula qiupuensis, a new species in Primulaceae from China, Phytotaxa 441 (2), pp. 176-182 : 181

Key to the five species of Primula sect. Ranunculoides

1. Corolla lobes apex obviously emarginated.........................................................................................................................................2

– Corolla lobes apex rounded................................................................................................................................................................4

2. Outer simple leaves kidney-shaped, inner compound leaves with 3–9 pinnae, scape apices differentiated to bulblets late in flowering.................................................................................................................................................................... P. ranunculoides

– Outer simple leaves ovate, inner compound leaves with 7-21 pinnae, scape apices lacking bulblets ...............................................3

3. Umbels solitary, flowers homostylous, limb ca. 6–10 mm across .............................................................................. P. cicutariifolia

– Umbels usually 1 or 2, flowers distylous, limb ca. 11–19 mm across ................................................................. P. jiugongshanensis

4. Pollen grains spheroidal and pantoporate, pinnae pinnatipartite to pinnatisect ............................................................. P. merrilliana

– Pollen grains suboblate and stephanocolpate, pinnae pinnatilobate to pinnatipartite ..................................................... P. qiupuensis