 Other North American species in this subgenus include "A. atkinsoniana", "A. chlorinosma", "A. cokeri", "A. daucipes", "A. mutabilis", "A. onusta", "A. pelioma", "A. polypyramis", "A. ravenelii", and "A. rhopalopus".European and Asian species (also in section "Lepidella") that are phylogenetically related—close to it in the evolutionary family tree—include "A. solitaria", "A. virgineoides", and "A. japonica".The specific epithet "abrupta" refers to the shape of the swollen base, which is abruptly enlarged rather than gradually tapering.