| Hey, I just found a google link that backs up and elaborates on above... |
Here is a link that might be useful: Lilacs: A Gardener's Encyclopedia By John L. Fiala, Freek Vrugtman
| Brandon is correct - these are often listed as synonymous cultivar names but there is a distinction in flowering pattern as noted. But both are selections of Syringa vulgaris. |
Here is a link that might be useful: variegated lilac