Miscanthus sinensis 'Variegatus' translated means Chinese striped miscanthus. When the plants are propagated vegetatively from cuttings or divisions, the selections are called clones. Some cultivars are grown from seed. The most common examples are columbines. Although individuals within a cultivar are fairly similar, there is always a small degree of genetic variation.
Pronunciation is another matter.
Unfortunately, plant names are often less stable than we would like. Just like people change their names, plants do also. It seems that as soon as we learn the old names, they are changed. There are several reasons behind the seeming madness of plant name changing. First of all, a taxonomist may discover that someone had previously published a name for the plant, prior to the currently accepted name.