Which species belongs to the genus Zinnia?

The genus Zinnia is a group of flowering plants in the daisy family (Asteraceae) known for their colorful and bright blooms, which are popular in gardens and landscapes. Each of the options presented relates to this genus in some way, but the correct choice specifically identifies a broader classification within the genus.

When considering the term “Zinnia sp.,” it refers to a species of the genus Zinnia without specifying which particular species it is. This designation is often used in botanical nomenclature to indicate that the speaker recognizes the plant as a member of that genus but doesn’t specify the exact species. It encompasses all the various species in the genus, including Zinnia elegans, Zinnia angustifolia, and Zinnia linearis, amongst others. This allows for a general reference to the genus while also indicating that any specific species could belong under that umbrella.

The other options list specific species of the Zinnia genus, which makes them valid examples of the genus, but not as broad a classification as “Zinnia sp.” This broader term can apply generically and encompasses any member of that genus, thus making it the most inclusive and correct choice in this scenario.