Question: Which genus has more species, Alyxia or Ranunculus?

Context paragraphs:
Alyxia: Alyxia is an Australasian genus of flowering plant in the dogbane family, Apocynaceae.  It contains at present 106 species, but "Alyxia stellata" and "A. tisserantii" are very variable, might be cryptic species complexes, and are need of further study.  It consists of shrubby, climbing or scrambling plants.  This genus occurs in China, the Himalayas, Southeast Asia, Malaysia, Australia, New Caledonia and the Pacific Islands.  There are 14 species in Australia, 21 in New Caledonia and 7 in the other Pacific Islands, including Hawaiʻ i.

Ranunculus aquatilis: Ranunculus aquatilis (common water-crowfoot, white water-crowfoot) is a plant species of the genus "Ranunculus", native throughout most of Europe and western North America, and also northwest Africa.

Ranunculus acraeus: Ranunculus acraeus, more commonly known as Alpine Buttercup, is a species of the buttercup family, Ranunculaceae, found in New Zealand.  This rare and native species of the buttercup strictly grows on an alpine habitat therefore its name "Ranunculus acraeus".  The genus "Ranunculus" includes buttercups and "acraeus" means 'on high.'  The plant grows about half a meter in width and is covered in beautiful, bright yellow flowers.  It may be mistaken for the "R. piliferus" but research has shown the "R. acraeus" to be its own distinctive species.  This species of buttercup is endemic to high altitudes.

Beckwithia (plant): Beckwithia is a genus of plants of the buttercup family.  Most botanists consider it synonymous to a clade consisting of "Ranunculus glacialis" and "Ranunculus andersonii".  "B. glacialis" has several distinct forms that may also be considered subspecies or closely related species.  However, molecular studies have supported the placement of "B. glacialis" and "B. camissonis" within "Ranunculus", distant from "B. andersonii".

Ranunculus: Ranunculus is a genus of about 500 species (Ranunculaceae)] of plants in the Ranunculaceae.  Members of the genus include the buttercups, spearworts, and water crowfoots.  The petals are often highly , especially in yellow species, owing to a special coloration mechanism: the petal's upper surface is very smooth causing a mirror-like reflection.  The flash aids in attracting pollinating insects and temperature regulation of the flower's reproductive organs.  Buttercups usually flower in the spring, but flowers may be found throughout the summer, especially where the plants are growing as opportunistic colonizers, as in the case of garden weeds.

Ranunculus flammula: Ranunculus flammula, the lesser spearwort, greater creeping spearwort or banewort, is a species of perennial herbaceous plants in the genus "Ranunculus" (buttercup), growing in damp places throughout the Boreal Kingdom.  It flowers June/July.  "Ranunculus flammula" is poisonous.

Ranunculus recurvatus: Ranunculus recurvatus, the blisterwort or hooked crowfoot, is a plant species of the genus "Ranunculus" in the family Ranunculaceae native to eastern North America.  It is an early-flowering plant of moist deciduous woods from central Quebec south to Florida.

Ranunculus flabellaris: Ranunculus flabellaris is a species of flowering plant in the buttercup genus, "Ranunculus", known by the common name yellow water buttercup.  It is native to much of North America, including the southern half of Canada and most of the United States.

Ranunculus arvensis: Ranunculus arvensis, the corn buttercup, devil-on-all-sides or scratch bur, is a plant species of the genus "Ranunculus".  It is native to Europe, but it can be found on other continents as an introduced species and sometimes a weed, including in North America and Australia.  It was formerly a common annual arable weed in Britain, but is now rare there.  It is most often found in moist places, such as spring puddles in meadows.

Ranunculus peltatus: Ranunculus peltatus (Pond Water-crowfoot) is a plant species in the genus "Ranunculus", native to Europe, southwestern Asia and northern Africa.

Supporting paragraphs: Alyxia Ranunculus
Answer: Ranunculus