Question: Which genus has more species, Bergenia or Cissus?

Context paragraphs:
Cissus antarctica: "Cissus antarctica" (synonym "Cissus oblongata"), called "kangaroo vine", is one of the best known species of the genus Cissus in the family of Vitaceae.  It is a climbing plant, a vine, and comes from Australia.

Bergenia stracheyi: Bergenia stracheyi is a plant species in the genus "Bergenia" found in the Western Himalayas, from 2700-4700 m, Afghanistan and Tajikistan.

Cissus adnata: Cissus adnata is a woody vine species in the genus "Cissus" found in Asia and Australia.

Cyphostemma: Cyphostemma is a flowering plant genus belonging to the family Vitaceae.  These species are caudiciform and used to belong to the genus "Cissus".  The genus name comes from Greek "kyphos", meaning "hump", and "stemma", meaning "garland".

Bergenia: Bergenia (elephant-eared saxifrage, elephant's ears) is a genus of ten species of flowering plants in the family Saxifragaceae, native to central Asia, from Afghanistan to China and the Himalayan region.

Bergenia ciliata: Bergenia ciliata (Hairy Bergenia, Hindi & Sanskrit : "Pashanbheda" (पाषाणभेद) ) is a plant species in the genus "Bergenia".

Cissus: Cissus is a genus of approximately 350 species of lianas (woody vines) in the grape family (Vitaceae).  They have a cosmopolitan distribution, though the majority are to be found in the tropics.

Bergenia crassifolia: Bergenia crassifolia, also called Korean elephant-ear, badan, Siberian tea, Mongolian tea, leather bergenia, winter-blooming bergenia, heartleaf bergenia, elephant-ears, heart-leaved bergenia or elephant's ears, is a plant species in the genus "Bergenia".  It is about 12 inches tall.  The leaves are spoon-shaped.  One cultivar is "Bergenia crassifolia" 'Autumn Red.'

Cissus cornifolia: Cissus cornifolia is an erect or semi-scandent woody shrub up to 3m in height belonging to the grape family of Vitaceae, and found from sub-Saharan Africa and Tropical Africa south to Botswana, Mozambique and South Africa.  It is one of more than 300 species forming the genus "Cissus".

Cissus tuberosa: Cissus tuberosa is a species of the "Cissus" genus in the Vitaceae (or commonly known as grape) family.  It is also incorrectly known as "Vitis" "tuberosa".

Supporting paragraphs: Bergenia Cissus
Answer: Cissus