...trying to comprehend the "sheer laziness" of the poor man who labelled every sprig of grass in your backyard... (^_^)

ssp is (also?) short for subspecies. Hybrids and custom-bred varieties of a single species are often not (rarely/never?) given individual species names as there is no such "natural" recognized species. Such items are often labelled "Genus-name ssp", or "Genus-name (species-name) var. tradename-made-up-by-inventor" (var for variety) in recoginition of the fact that it is genetically impure or exhibits characteristics not found in the wild.