1. A taxonomic subdivision of a species based on minor characteristics and often on exclusive geographic range.
2. An assemblage of cultivated individuals distinguished by any useful, reproducible (sexual or asexual) characters. (25)

Reproduction by other than sexually produced seed. Includes grafting, budding, rooting of cuttings, and tissue and cell culture, including embryogenesis.

A tree that has escaped logging, windthrow, or fire, and occupies a dominant position in the stand. (3)

Of a seed, spore, or pollen grain, its capacity to germinate and develop, under given conditions. (3)

Assumption of the health of a tree based on observation of the foliage. (10)

Natural forest, the development of which has been virtually uninfluenced by modern human activity.

Natural regeneration following site preparation and seeding or planting that could either supplement or completely obscure the trees being planted or seeded on the area.