Oxalis tuberosa is a perennial herbaceous plant that overwinters as underground stem tubers.
 These tubers are known as uqa in Quechua, oca in Spanish, New Zealand yam and a number of other alternative names.
 The plant was brought into cultivation in the central and southern Andes for its tubers, which are used as a root vegetable.
 The plant is not known in the wild, but populations of wild "Oxalis" species that bear smaller tubers are known from four areas of the central Andean region.
 Oca was introduced to Europe in 1830 as a competitor to the potato, and to New Zealand as early as 1860.
Flemingia is a genus of flowering plants in the legume family Fabaceae.
 It is native to Asia and the species are distributed in Bhutan, Burma, China, India; Indonesia, Laos, Malaysia, Nepal, Pakistan, Papua New Guinea, Philippines, Sri Lanka, Taiwan, Thailand and Vietnam.
 The genus was founded in 1812.
 The number of known species is ambiguous due to taxonomic problems; and is usually enumerated as more than 30.
 Burma and China have the highest record of "Flemingia" species with 16 each, followed by India (with 15 species), Thailand (11 species), Laos (10 species), Vietnam (8 species), Bhutan (1 species) and Nepal (5 species).
Ruscus is a genus of six species of flowering plants, native to western and southern Europe (north to southern England), Macaronesia, northwest Africa, and southwestern Asia east to the Caucasus.
 In the APG III classification system, it is placed in the family Asparagaceae, subfamily Nolinoideae (formerly the family Ruscaceae).
 Like many lilioid monocots, it was formerly classified in the family Liliaceae.
Hibiscus acetosella (cranberry hibiscus or African rosemallow) is an angiosperm of the genus "Hibiscus" or rosemallow.
 The word "acetosella" is of Latin origin and is derived from an old name for sorrel (Oxalis) which comes from the sour taste experienced when eating the young leaves of the plant.
 "Hibiscus acetosella" is also known colloquially as false roselle, maroon mallow, red leaved hibiscus, and red shield hibiscus.
 It is one of the approximately 200–300 species that are seen in sub-tropic and tropic regions.
 This ornamental is usually found in abandoned fields or open areas, marshes, and forest clearings.
 Cranberry hibiscus is a member of a perennial group known as hardy hibiscus.
 In contrast to the tropical hibiscus, hardy hibiscus can tolerate colder conditions, are more vigorous, longer lasting, and have larger flowers.
 In colder climates, "Hibiscus acetosella" is easily an annual, but is often regarded as a perennial to zone 8–11.
 During one season, the plant can grow 90 – tall and 75 cm wide as a shrub-subshrub.
Gromphadorhinini is a tribe of large, flightless, wood-inhabiting cockroaches comprising 20 known species in 6 genera , all but one from the island of Madagascar; the one exception being from Europa Island just off the coast of Madagascar.
 They are collectively known as hissing cockroaches, capable of producing sound by forcing air through their abdominal spiracles, and many species are popular in the pet trade, especially the species commonly called "the Madagascar hissing cockroach", "Gromphadorhina portentosa".
 Remarkably, despite their size, 9 of the 20 known species of hissing roaches were not recognized until recently, having only been described in 1973.
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.
Termitaphididae, occasionally called termite bugs, is a small tropicopolitan family of true bugs placed in the superfamily Aradoidea.
 Typically members of Termitaphididae are small, being an average of 2 mm -4 mm , and flattened with laminae extending out from each body segment giving a round scale like appearance.
 Currently the family contains two genera and twelve known species.
 Members of Termitaphididae are inquilines lodging in the nests of host species of termite families Termitidae and Rhinotermitidae.
 Though considered a separate family in Aradoidea it has been suggested by Drs David Grimaldi and Michael Engel in 2008 that Termataphididae may in fact be highly derived members of Aradidae.
 Of the thirteen known species one "Termitaphis circumvallata" belongs to the monotypic genus "Termitaphis" and four of the remaining eleven species in "Termitaradus" are extinct, having only been found in amber.
 The living species are found worldwide in the tropical regions of Central and South America, Africa, Asia, and Australia.
Malvaceae, or the mallows, is a family of flowering plants estimated to contain 244 genera with 4225 known species.
 Well-known members of this family include okra, cotton, cacao and durian.
 The largest genera in terms of number of species include "Hibiscus" (300 species), "Sterculia" (250 species), "Dombeya" (250 species), "Pavonia" (200 species) and "Sida" (200 species).
Oxalis is a large genus of flowering plants in the wood-sorrel family Oxalidaceae comprising about 800 of the 900 known species in the family.
 The genus occurs throughout most of the world, except for the polar areas; species diversity is particularly rich in tropical Brazil, Mexico and South Africa.
Oxalis glabra is a member of the wood-sorrel family, Oxalidaceae.
 It is only one of the 800 total species belonging to this family.
 The plant is commonly known as "finger-leaf" due to its trifoliate leaf structure.
 This trifoliate structure can be seen in variations throughout all members of the "Oxalis" genus.
 However, the particularly narrow leaflets of the glabra plant look more like fingers rather than a common clover.
 The plant is native to South Africa and can be found carpeting the ground of woodlands and bushlands.

Question: Between Ruscus and Oxalis, which one has more number of known species?
Answer: Oxalis