Unisexual: Of one sex, having stames only or pistils only.
Variety: Used in this work for a botanical variety which is a subdivision of a species; an agricultural or horticultural variety is referred to as a cultivar (q.v.).
Vernalization: The treatment of seeds or bulbs before planting to hasten flowering.
Xerophyte: A plant structurally adapted for growth with a limited water supply.
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