Protologue of Tradescantia crassula, page 1 (Link and Otto 1828a: 13).

 
 
  Part of: Hassemer G, Funez LA, Ferreira JPR, Aona LYS (2017) The correct typification of Tradescantia crassula (Commelinaceae). PhytoKeys 80: 121-127. https://doi.org/10.3897/phytokeys.80.13448