This subject introduces a wide variety of plant materials used in urban (environmental) horticulture. Plant materials studied include annual, perennial, herbaceous, wood, exotic, and native plant species. These plant materials are studied within the context of their uses for enhancement of the urban surroundings. The subject also introduces plant morphology and anatomy in relation to function, through the study of plant organs and tissues. There is a particular focus on vegetative biology. Techniques of plant propagation, both sexual and asexual, including seeds, cuttings, budding, grafting, layering, separation and division, are part of the program.