Chinese yam ("Dioscorea polystachya"), also called cinnamon-vine, is a species of flowering plant in the yam family.
 This perennial climbing bine native to China now grows throughout East Asia (Japan, Korea, Kuril Islands, Vietnam).
 It is believed to have been introduced to Japan in the 17th century or earlier.
 Introduced to the United States as early as the 19th century for culinary and cultural uses, it is now considered an invasive plant species.
 The plant was introduced to Europe in the 19th century during the European Potato Failure, where cultivation continues to this day for the Asian food market.
 The edible tubers, often called nagaimo or Chinese-potato, are cultivated largely in Asia and sometimes used in alternative medicine.
 This species of yam is unique as the tubers can be eaten raw.
Drimiopsis maculata, also known by the common names little white soldiers, African false hosta, African hosta, leopard plant, is a flowering plant species in the genus "Drimiopsis".
 It is the type species of its genus.
 It occurs from Tanzania to South Africa.
Abutilon sandwicense, commonly known as the greenflower Indian mallow, is a species of flowering plant in the mallow family, Malvaceae, that is endemic to the island of Oʻ ahu, Hawaii, in the United States.
 It inhabits dry forests on the slopes of the Waiʻ anae Range at elevations of 400 - .
 Associated plants include lama ("Diospyros sandwicensis"), ēlama ("D. hillebrandii"), māmaki ("Pipturus albidus"), kalia ("Elaeocarpus bifidus"), āulu ("Sapindus oahuensis"), olopua ("Nestegis sandwicensis"), and alaheʻ e ("Psydrax odorata").
 Greenflower Indian mallow is a shrub, reaching a height of 1.5 - .
 It is threatened by habitat loss.
Artanema longifolium is an edible flowering plant species found in tropical Africa, India and South-East Asia.
 The leaves are eaten as a leafy vegetable.
Sapindus is a genus of about five to twelve species of shrubs and small trees in the Lychee family, Sapindaceae, native to warm temperate to tropical regions in both the Old World and New World.
 The genus includes both deciduous and evergreen species.
 Members of the genus are commonly known as soapberries or soapnuts because the fruit pulp is used to make soap.
 The generic name is derived from the Latin words "sapo", meaning "soap", and "indicus", meaning "of India".
The genus Artanema is a small group of flowering plant species in the Linderniaceae.
 It was formerly included in the Plantaginaceae, but reclassified based on genetic evidence.
Hibiscadelphus giffardianus (Kilauea hau kuahiwi) is a species of flowering plant in the mallow family, Malvaceae, that is endemic to the Big Island of Hawaii.
 It is believed to be extinct in the wild; any remaining plants are threatened by habitat loss.
 Cultivated plants exist in Hawaii Volcanoes National Park.
 It inhabits mixed mesic forests on the slopes of Mauna Loa at elevations of 1200 - .
 Associated plants include ʻ ōhiʻ a lehua ("Metrosideros polymorpha"), koa ("Acacia koa"), mānele ("Sapindus saponaria"), hoio ("Diplazium sandwicianum"), pilo ("Coprosma" spp.)
, māmaki ("Pipturus albidus"), kōpiko ("Psychotria" spp.)
, olopua ("Nestegis sandwicensis"), alani ("Melicope" spp.)
, ʻ aʻ aliʻ i ("Dodonaea viscosa"), and naio ("Myoporum sandwicense").
 "H. giffardianus" is a small tree, reaching a height of 7 m and trunk diameter of 30 cm .
Aldrovanda vesiculosa, commonly known as the waterwheel plant, is the sole extant species in the flowering plant genus "Aldrovanda" of the family Droseraceae.
 The plant captures small aquatic invertebrates using traps similar to those of the Venus flytrap.
 The traps are arranged in whorls around a central, free-floating stem, giving rise to the common name.
 This is one of the few plant species capable of rapid movement.
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.
Geogenanthus poeppigii, commonly called the seersucker plant, is a flowering plant species in the family "Commelinaceae" (the dayflower & spiderwort family).
 As currently circumscribed, the genus "Geogenanthus" includes two other species, "G. ciliatus" and "G. rhizanthus".
 This species is named after E.F. Poeppig, 19th century German explorer.
 "Geogenanthus undatus" is an outdated synonym for "G. poeppigii".
 For more details on the rather complicated synonmy for this species, see Faden (1981).

Question: Which genus is a small group of flowering plant species, Sapindus, Artanema, or both?
Answer: Artanema