Do both Tithonia and Pachysandra belong to the taxonomic category of genus?
Pachysandra Pachysandra is a genus of five species of evergreen perennials or subshrubs, belonging to the boxwood family Buxaceae. The species are native to eastern Asia and southeast North America, some reaching a height of 20 - , with only weakly woody stems. The leaves are alternate, leathery, with an entirely too coarsely toothed margin, and are typically 5 - long. The small uni-sexual blooms are greenish-white and produced in late spring or early summer.
Heliconia Heliconia, derived from the Greek word "helikonios", is a genus of flowering plants in the family Heliconiaceae. Most of the ca 194 known species are native to the tropical Americas, but a few are indigenous to certain islands of the western Pacific and Maluku. Many species of "Heliconia" are found in rainforests or tropical wet forests of these regions. Several species are widely cultivated as ornamentals, and a few are naturalized in Florida, Gambia and Thailand. Common names for the genus include lobster-claws, toucan peak, wild plantains or false bird-of-paradise. The last term refers to their close similarity to the bird-of-paradise flowers ("Strelitzia"). Collectively, these plants are also simply referred to as "heliconias".