Opiliaceae is a family of flowering plants comprising 11 genera and 33 known species.
 It consists of tropical woody plants.
 Several genera contain parasitic species.
 The biggest genus, in number of species and in stature of the individual plants, is "Agonandra", the only American genus.
The Cleomaceae are a small family of flowering plants in the order Brassicales, comprising about 300 species in 10 genera, or about 150 species in 17 genera.
 These genera were previously included in the family Capparaceae, but were raised to a distinct family when DNA evidence suggested the genera included in it are more closely related to the Brassicaceae than they are to the Capparaceae.
 The APG II system allows for Cleomaceae to be included in Brassicaceae.
Carduus is a genus of flowering plants in the aster family, Asteraceae, and the tribe Cynareae, one of two genera considered to be true thistles, the other being "Cirsium".
 Plants of the genus are known commonly as plumeless thistles.
 They are native to Eurasia and Africa, and several are known elsewhere as introduced species.
 This genus is noted for its disproportionately high number of noxious weeds compared to other flowering plant genera.
Apiaceae or Umbelliferae, is a family of mostly aromatic flowering plants named after the type genus "Apium" and commonly known as the celery, carrot or parsley family.
 It is the 16th-largest family of flowering plants, with more than 3,700 species in 434 genera including such well-known and economically important plants such as angelica, anise, asafoetida, caraway, carrot, celery, chervil, coriander, cumin, dill, fennel, hemlock, lovage, cow parsley, parsley, parsnip, sea holly, giant hogweed and silphium (a plant whose identity is unclear and which may be extinct).
Aphelandra is a genus of about 170 species of flowering plants in the family Acanthaceae, native to tropical regions of the Americas.
Typhonodorum is a monotypic genus of flowering plants in the family Araceae.
 The single species making up this genus is Typhonodorum lindleyanum.
 The genus is native to Madagascar, the Comores, Zanzibar, and Mauritius.
 This genus is believed to be closely related to "Peltandra" even though "Peltandra" is only found in North America and there don't appear to exist closely related genera in the African mainland.
 There isn't fossil evidence to link the two genera so it has been proposed that there once was a genus in Africa from which the two genera had originated.
 The African mainland genus spread to North America and to Madagascar 50 million years ago before it broke off.
 Then the African genus became extinct and the North American and Madagascan genera remained.
Gnetophyta is a division of plants, grouped within the gymnosperms (which also includes conifers, cycads, and ginkgos), that consists of some 70 species across the three relict genera: "Gnetum" (family Gnetaceae), "Welwitschia" (family Welwitschiaceae), and "Ephedra" (family Ephedraceae).
 Fossilized pollen attributed to a close relative of "Ephedra" has been dated as far back as the Early Cretaceous.
 Though diverse and dominant in the Tertiary, only three families, each containing a single genus, are still alive today.
 The primary difference between gnetophytes and other gymnosperms is the presence of vessel elements, a system of conduits that transport water within the plant, similar to those found in flowering plants. Because of this, gnetophytes were once thought to be the closest gymnosperm relatives to flowering plants, but more recent molecular studies have largely disproven this hypothesis.
Pithecellobium is a genus of flowering plants in the legume family, Fabaceae.
 The generic name is derived from the Greek words πιθηκος ("pithekos"), meaning "ape" or "monkey," and ελλοβιον ("ellobion"), meaning "earring," which refers to the coiled shape of the fruit pods.
 Plants of the genus are known generally as blackbeads.
Chloranthaceae is a family of flowering plants (angiosperms), the only family in the order Chloranthales.
 It is not closely related to any other family of flowering plants, and is among the early-diverging lineages in the angiosperms.
 They are woody or weakly woody plants occurring in Southeast Asia, the Pacific, Madagascar, Central and South America, and the West Indies.
 The family consists of four extant genera, totalling about 77 known species according to Christenhusz and Byng in 2016.
 Some species are used in traditional medicine.
 The type genus is "Chloranthus".
The Fabaceae or Papilionoideae, commonly known as the legume, pea, or bean family, is a large and economically important family of flowering plants.
 It includes trees, shrubs, and perennial or annual herbaceous plants, which are easily recognized by their fruit (legume) and their compound, stipulated leaves.
 Many legumes have characteristics of flowers and fruits.
 The family is widely distributed, and is the third-largest land plant family in terms of number of species, behind only the Orchidaceae and Asteraceae, with about 751 genera and some 19,000 known species.
 The five largest of the genera are "Astragalus" (over 3,000 species), "Acacia" (over 1000 species), "Indigofera" (around 700 species), "Crotalaria" (around 700 species) and "Mimosa" (around 500 species), which constitute about a quarter of all legume species.
 The ca. 19,000 known legume species amount to about 7% of flowering plant species.
 Fabaceae is the most common family found in tropical rainforests and in dry forests in the Americas and Africa.

Question: Are Aphelandra and Pithecellobium both genera of flowering plants?
Answer: yes