Subdivisions All names used in this section are taken from the International Plant Names Index. , Plants of the World Online (POWO) accepts 49 species and 5 named hybrids, all of which are listed below. The geographical locations are taken from POWO and the Flora of North America, except where noted.
subdivisions all names used in this section are taken from the international plant names index  plants of the world online (powo) accepts 49 species and 5 named hybrids all of which are listed below the geographical locations are taken from powo and the flora of north america except where noted