ABSTRACT:

A total number of 18 new species of Anthurium section Calomystrium are described as new to science: Anthurium alturaense Croat, A. breviapiculum Croat, A. cascajalense Croat, A. churchilleorum Croat, A. deminutum Croat, A. granulineare Croat, A. guanghuae Croat, A. haltonii Croat, A. henryi Croat, A. horridum Croat, A. ingramii Croat, A. kareniae Croat, A. laminense Croat, A. lilafructum Croat, A. luteospathum Croat, A. penonomense Croat, A. roubikii Croat, and A. suethompsoniae Croat.