Question: Which plant has more species, Acradenia or Parthenocissus?

Context paragraphs:
Parthenocissus henryana: Parthenocissus henryana (Chinese Virginia-creeper or silver vein creeper) is a species of flowering plant in the vine family Vitaceae, native to China.  It is a vigorous, deciduous tendril climber growing to 10 m .  It has a more restrained growth than the other Virginia creepers.  The large palmate leaves consist of five to nine oval leaflets, each up to 12 cm long, with strong white veining.  The leaves colour to brilliant red in autumn before falling.  Clusters of inconspicuous flowers in summer may be followed by black fruits.

Parthenocissus quinquefolia: Parthenocissus quinquefolia, known as Virginia creeper, Victoria creeper, five-leaved ivy, or five-finger, is a species of flowering plant in the grape family, Vitaceae.  It is native to eastern and central North America, from southeastern Canada and the eastern United States west to Manitoba and Utah, and south to eastern Mexico and Guatemala.

Parthenocissus: Parthenocissus , is a genus of tendril climbing plants in the grape family, Vitaceae.  It contains about 12 species native to the Himalayas, eastern Asia and North America.  Several are grown for ornamental use, notably "P. henryana", "P. quinquefolia" and "P. tricuspidata".

Acradenia: Acradenia is a genus of trees comprising two species from Australia.  Its closest relative is "Crossosperma" from New Caledonia.

Isocoma acradenia: Isocoma acradenia is a North American species of flowering plant in the daisy family known by the common name alkali goldenbush.

Parthenocissus laetevirens: Parthenocissus laetevirens is a climbing plant species in the genus "Parthenocissus" found in China.

Parthenocissus tricuspidata: Parthenocissus tricuspidata is a flowering plant in the grape family (Vitaceae) native to eastern Asia in Japan, Korea, and northern and eastern China.  Although unrelated to true ivy, it is commonly known as Boston Ivy, grape ivy, and Japanese ivy, and also as Japanese creeper, and by the name woodbine (though the latter may refer to a number of different vine species).

Supporting paragraphs: Acradenia Parthenocissus
Answer: Parthenocissus