Aconogonon (Meisner) Reichenbach.

Plants without prickles. Leaves variable, not hastate or sagittate. Inflorescence diffusely paniculate. Perianth 5-parted, sometimes enlarging in fruit. Nectaries broad and confluent at base. Style 1, trifid, or appearing capitate.

Between 20 and 30 species: mainly in the mountains of E Asia; 21 species (five endemic) in China.

For further information, the reader may wish to refer to Hong (Symb. Bot. Upsal. 30(2): 1–118. 1992).