((('Isoetes australis MR',('Isoetes australis DR','Isoetes australis MM')),('Isoetes coromandelina',('Isoetes panamensis',('Isoetes cubana','Isoetes jamaicensis')))),(('Isoetes capensis','Isoetes toximontana'),('Isoetes stellenbossiensis','Isoetes stephansenii')),(('Isoetes malinverniana',(('Isoetes hypsophila',('Isoetes drummondii','Isoetes gunnii',('Isoetes pusilla',('Isoetes kirkii','Isoetes muelleri')),('Isoetes taiwanensis','Isoetes japonica','Isoetes yunguiensis','Isoetes habbemensis'))),(('Isoetes histrix','Isoetes setacea'),((('Isoetes lithophila','Isoetes melanopoda'),'Isoetes butleri','Isoetes prototypus'),(('Isoetes hawaiiensis','Isoetes echinospora'),'Isoetes valida'),'Isoetes flaccida','Isoetes storkii',('Isoetes howellii','Isoetes engelmannii','Isoetes melanospora'))))),((('Isoetes nuttallii','Isoetes minima'),'Isoetes orcuttii'),(('Isoetes dixitei','Isoetes abyssinica'),(('Isoetes velata','Isoetes longissima'),'Isoetes olympica')))));