Furcraea is a genus of succulent plants belonging to the family Asparagaceae, subfamily Agavoideae, native to tropical regions of Mexico, the Caribbean, Central America and northern South America.
 Some species are also naturalized in parts of Africa, Florida, Portugal, Thailand, India, and Australia, as well as on various oceanic islands.
Senecio flaccidus, formerly recorded as "Senecio douglasii" (in honor of the botanist David Douglas) member of the daisy family and genus "Senecio" also known as threadleaf ragwort (and threadleaf groundsel, bush senecio, creek senecio, shrubby butterweed, comb butterweed, smooth threadleaf ragwort, Mono ragwort, Douglas ragwort, Douglas groundsel, sand wash groundsel, felty groundsel, old man, yerba cana, squawweed or cenicillo) is a native of the southwestern Great Plains of North America.
Riddelliine (not to be confused with Ritalin) is a chemical compound classified as a pyrrolizidine alkaloid.
 It was first isolated from "Senecio riddellii" and is also found in a variety of plants including "Jacobaea vulgaris", "Senecio vulgaris", and others plants in the genus "Senecio".
Senecio haworthii also known as Woolly senecio is a perennial dwarf shrub of the "Senecio" genus that grows in South Africa usually between the altitudes of 900 and 1200 meters.
Dendrosenecio kilimanjari is a giant groundsel found atop Mount Kilimanjaro in Africa.
 It was originally known as Senecio kilimanjari, but a recent botanical reclassification split off some species formerly in "Senecio", putting it and various other species in the new genus "Dendrosenecio".
 Both genera are in the family "Asteraceae".
 The giant grounsels of the genus "Dendrosenecio" evolved, about a million years ago, from a "Senecio" that established itself on Mount Kilimanjaro, with those that survived adapting into "Dendrosenecio kilimanjari".
 This later colonised other mountains by some means - the standard distance for wind dispersal of seeds is a few metres - and these isolated populations adapted in ways different from the parent population, creating new species.
or succulent bush senecio ("Senecio barbertonicus" ) is an evergreen succulent shrub of the family Asteraceae and genus "Senecio", native to Southern Africa, named after one of its native localities Barberton and is now also being cultivated elsewhere for its drought resistance, clusters of sweetly scented, golden-yellow, tufted flower heads in winter and attractiveness to butterflies, the painted lady butterfly ("Vanessa cardui") in particular.
is a genus of the daisy family (Asteraceae) that includes ragworts and groundsels.
 The scientific Latin genus name, "Senecio", means "old man."
Senecio tamoides or also known as Canary creeper (a name it shares with "Senecio deltoideus" Less.)
 is a climbing member of the genus "Senecio" of the family Asteraceae.
Jacobaea maritima (silver ragwort) (formerly known as "Senecio cineraria") is a perennial plant species in the genus "Jacobaea" in the family Asteraceae, native to the Mediterranean region.
 It was formerly placed in the genus "Senecio", and is still widely referred to as Senecio cineraria; see the list of synonyms (right) for other names.
Dendrosenecio johnstonii, formerly Senecio johnstonii, is a giant groundsel found in the middle altitudes of Mount Kilimanjaro in Africa.
 A recent botanical reclassification split off some species formerly in "Senecio", putting the giant groundsels in the new genus "Dendrosenecio".
 It also redefined the former species Senecio cottonii, as a subspecies of "Dendrosenecio johnstonii".
 Both genera are in the family "Asteraceae".
 The giant grounsels of the genus "Dendrosenecio" evolved, about a million years ago, from a "Senecio" that established itself on Mount Kilimanjaro, with those that survived adapting into "Dendrosenecio kilimanjari".
 As it moved down the mountain, the adaptations necessary for the new environment created the new species, "Dendrosenecio johnstonii".
 Various subspecies are found on other mountains.

Question: Senecio and Furcraea are both a genus of what?
Answer: plants