Hundreds of thousands of different flowering plants exist. Classifying them---a biology branch called taxonomy---helps scientists sort through them for study. There's more than one taxonomic scheme, but the system that includes species uses binomial nomenclature to classify flowers. The system includes life in groups according to broad shared traits, then becomes more and more specific. Thus, all plants belong to the Plantae kingdom, with the various species the most specific classification of a plant. In this classification system, individual plants are referred to by two Latin words, the first being genus, the second, a plant's species.
The Venus flytrap is the sole member of the muscipula species of the genus Dionaea. Dionaea muscipula is a carnivorous plant with leaves that form a hinged trap. Within the trap are trigger hairs. If a bug brushes by the hairs more than once, the trap snaps shut and the Venus flytrap begins digesting its dinner. Though many people have the Venus flytrap in their houseplant collection, the species is native only to a small area of North and South Carolina.
Mistletoe is a parasitic plant, that is, it pulls what it needs---say, nutrients and water---from a host plant. American mistletoe---species serotinum, genus Phorandendron (or "Phorandendron serotinum")--uses only deciduous hosts such as oak trees. Phorandendron serotinum, thus, also goes by the name oak mistletoe.
Trees can be weakened by parasitic plants, and those wanting to get rid of mistletoe must prune off affected foliage or hire someone licensed to apply the chemical Ethephon.
Flowering plants---angiosperms---are the only plant life that flowers, then fruits. For the fruiting to occur though, angiosperms need to be pollinated. Some plants, including the arnoldii species of the Rafflesia genus, put out scents to attract helpers like bees and butterflies, even bats. Rafflesia arnoldii tries to attract carrion flies with the strong smell of decomposing flesh.
The terrible odor of Rafflesia arnoldii is not the plant's only distinctive characteristic. This species produces the largest flower in the world, growing up to 15 pounds and 3 feet in diameter. This species is also parasitic and grows in Indonesia.
The aster family possesses the most species of all angiosperms. One of these is the fleabane of the species floribunda and the genus Conyza. While the Rafflesia arnoldiiis is huge, fleabane is tiny, with only a diminutive 3 mm or so worth of diameter. That's less than 1/8 of an inch wide. Fleabane is a native of South America.