CULTIVAR CHECKLIST FOR ENGLISH OAK (QUERCUS ROBUR)

Abstract. Cultivars of the English oak (Quercus robur) are described and discussed. Most English oak cultivars currently available in the nursery trade are propagated by seed and, although selected to a standard as seedlings in the nursery, they still possess considerable genetic diversity in many characteristics. Such cultivars are not "clones", and the poten-tial variation in non-morphological traits must be appreciated when selecting cultivars for planting or assessing their perfor-mance. In compiling cultivar checklists of landscape trees over the past few years, we have become acutely aware that each genus represents its own set of problems. Such is certainly the case in the oaks {Quercus sp.), which are probably the most numerous and widespread broadleaved trees i