Description
Branched, perennial herbs.
Leaves crenate.
Flowers medium-sized, usually in few-flowered, axillary verticillasters.
Stamens 4, didymous, ascending, posterior pair smaller and shorter than anterior pair;
Distribution
Asia-Tropical: Jawa (Jawa present); Sumatera (Sumatera present), S. China present, S. Europe present, S. to SE. Asia present, Southern America: Argentina Northeast (Formosa present)
Species 3, in S. Europe and S. to SE. Asia, extending to S. China, Formosa, and Malesia (Sumatra, Java).
Citation
BRIQ. 1896 – In: E. & P., Nat. Pfl. Fam. 4: 295
KENG 1969 – In: Gard. Bull. Sing.: 108
LINNE 1753: Sp. Pl.: 592
