Unit means, unless otherwise determined by the Deputy Administrator, basic unit as defined in part 457 or 1437.9 of this title, for ornamental nursery production, includes all eligible plant species and sizes.
7 CFR § 760.1502
The following definitions apply to this subpart. The definitions in 718.2 and 1400.3 of this title also apply, except where they conflict with the definitions in this section. In the event of conflict, the definitions in this section apply.