Narrative

Four Oclock Family (Nyctaginaceae) contains about 250-350 species organized into about 34 different genera. Although most of the species are herbs, several tropical genera include shrubs and trees. The leaves are usually simple and entire. There are frequently no petals in the flowers, as the tube-like calyx can serve the same function. This family had 16 genera with 124 species growing in greater North America as of 1994.

Taxonomy

References