Polygonum is a genus of about 220 species of flowering plant in the buckwheat and knotweed family Polygonaceae.
 Common names include knotweed, knotgrass, bistort, tearthumb, mile-a-minute, smartweed and several others.
 In the Middle English glossary of herbs "Alphita" ( 1400-1425), it was known as ars-smerte.
 There have been various opinions about how broadly the genus should be defined.
 For example, Buckwheat ("Fagopyrum esculentum") has sometimes been included in the genus as "Polygonum fagopyrum".
Ramonda is a genus of three species of flowering plants in the family Gesneriaceae, native to shady, rocky places in north eastern Spain, the Pyrenees and south eastern Europe.
 They are evergreen perennials which form rosettes of crinkly leaves with nearly actinomorphic flowers, borne on leafless stems in spring.
Ramonda nathaliae, also known as Natalie's Ramonda, is a species of flowering plant in the genus "Ramonda" that grows in Serbia and Macedonia, mostly in the east of both countries.
 The flower is considered a symbol of the Serbian Army's struggle during World War I.
 The plant was scientifically described in 1884 from specimens growing around Niš, by Sava Petrović and Josif Pančić, who named it after Queen Natalija Obrenović.
The Polygonaceae are a family of flowering plants known informally as the knotweed family or smartweed—buckwheat family in the United States.
 The name is based on the genus "Polygonum", and was first used by Antoine Laurent de Jussieu in 1789 in his book, "Genera Plantarum".
 The name refers to the many swollen nodes the stems of some species have.
 It is derived from Greek; "poly" means many and "goni" means knee or joint.
Persicaria is a genus of herbaceous flowering plants in the knotweed family, Polygonaceae.
 Plants of the genus are known commonly as knotweeds or smartweeds.
 It has a cosmopolitan distribution, with species occurring nearly worldwide.
 The genus was segregated from "Polygonum".
Polygonum cognatum, commonly called Indian knotgrass or madimak (from Turkish "madımak"), is an edible weedy creeping perennial herb in the genus "Polygonum", frequently eaten by people of Turkey.
 It has larger leaves than most other species of "Polygonum".
Fallopia is a genus of about 12–15 species of flowering plants in the buckwheat family, often included in a wider treatment of the related genus "Polygonum" in the past.
 The genus is native to temperate and subtropical regions of the Northern Hemisphere.
 The genus includes herbaceous perennial plants, herbaceous vines, and woody vines.

Question: Which genus has more species, Ramonda or Polygonum?
Answer: Polygonum