Under the "rules" the name of the species retains that name through all subspecific categories. Although we only usually write it to the lowermost category needed, as say O. microdasys, or O. microdasys ssp. rufida. However you may find it written in some botanical keys to as many subspecific categories as are needed to distinguish it as the type form, e.g. as an extreme example Opuntia microdasys ssp. microdasys, v. microdasys f. microdasys, but it is unusual to write it to so many lower or subspecific ranks. An example from the key in the link below:-
"4a Ribs typically 5-7. Spines usually 8 or fewer, thick and angular in cross-section. Mostly only 0-1 central spine. Mostly in woodland areas. ....................................................................... E. triglochidiatus var. triglochidiatus"
http://www.new-mexico.cactus-society.or ... 205-12.pdf" onclick="window.open(this.href);return false;
But don't get confused since E. triglochidiatus var. triglochidiatus simply means it is E. triglochidiatus the type form and not another variety of it. Though as you probably know the category of subspecies (ssp.) is now tending to replace that of variety (v. or var.) in botanical nomenclature.
