NOCTI Horticulture Practice Test

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In the botanical name prunus serrulata 'Kwanzan' the portion in single quotes refers to

Genus

Species

Family and species

Variety or cultivar

The part in quotes is the cultivar name—the cultivated form chosen for specific traits. In plant naming, Prunus serrulata is the species, and 'Kwanzan' identifies a particular cultivated variety of that species. Cultivars are selected for characteristics like flower color, form, or bloom time and are propagated vegetatively (by grafting or cuttings) to maintain those traits exactly. This is not the genus, species, or family, but the specific cultivated form of the plant.

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