The forms and étages are cross-classified to produces ten basic genus-types or "genera", most of which can be divided into sub-types consisting of "species" that are often subdivided into "varieties" where applicable.
Most genera can be divided into "species" that are often subdivided into "varieties" where applicable. The forms and étages are cross-classified to produces ten basic genus-types or "genera".
The forms and étages are cross-classified to produces ten basic genus-types or "genera". Most genera can be divided into "species" that are often subdivided into "varieties" where applicable.
The forms and étages are cross-classified to produces ten basic genus-types or "genera". Most genera can be divided into "species" that are often subdivided into "varieties" where applicable.