For the purposes of this Regulation, ‘specified plants’ shall mean naturally or artificially dwarfed plants for planting of the following species:
Chamaecyparis sp. Spach,
Juniperus sp. L.,
Pinus parviflora Sieb. & Zucc. (Pinus pentaphylla Mayr),
Pinus thunbergii Parl.,
Pinus parviflora Sieb. & Zucc., grafted on a rootstock of another Pinus species, originating in Japan, and
Pinus thunbergii Parl. grafted on a rootstock of another Pinus species, originating in Japan.