Question: Which plant has more common names, Crataegus or Spartium?

Context paragraphs:
Crataegus douglasii: Crataegus douglasii is a North American species of hawthorn known by the common names black hawthorn and Douglas' thornapple.  It is named after David Douglas, who collected seed from the plant during his botanical explorations.

Dracaena braunii: Dracaena braunii is a species of the genus "Dracaena".  It is also known as "Dracaena sanderiana", after the German–English gardener Henry Frederick Conrad Sander (1847–1920).  Common names include Sander's dracaena, ribbon dracaena, lucky bamboo, curly bamboo, Chinese water bamboo, friendship bamboo, Goddess of Mercy plant, Belgian evergreen, and ribbon plant.  Although the word "bamboo" occurs in several of this plant's common names, "D. braunii" is of an entirely different taxonomic order from true bamboos. Despite several of its common names that suggest it is from China or Belgium, it is a native African species.

Thonningia: Thonningia is a monotypic genus of flowering plants in the family Balanophoraceae containing the single species Thonningia sanguinea.  It is distributed throughout much of southern and western Africa, particularly the tropical regions.  Common names for the plant include ground pineapple.  A familiar plant to humans, it has an extremely long list of common names in many African languages.  Many names are inspired by the resemblance of the plant's inflorescence to a pineapple or palm tree.  Some of the names can be translated as pineapple of the bush (from Anyi), duiker's kolanut (from Igala), and crown of the ground (from Yoruba).

Crataegus succulenta: Crataegus succulenta is a species of hawthorn known by the common names fleshy hawthorn, succulent hawthorn, and round-fruited cockspurthorn.  It is "the most wide-ranging hawthorn in North America", native to much of southern Canada, and the United States as far south as Arizona, New Mexico, Kansas, Missouri, North Carolina, and Tennessee.  In this wide area there are many variant forms that have received species names, but can also be considered as synonyms.

Crataegus azarolus: Crataegus azarolus is a species of hawthorn known by the common names azarole, azerole, and Mediterranean medlar.  It is native to the Mediterranean Basin and is a common plant there, growing on sites comparable to those the European common hawthorn grows on.  In the Arab countries it is the commonest of the hawthorn species; in the Arabic language the term "common hawthorn" means the azarole hawthorn.  When growing in the wild the azerole bears plentiful crops of haw fruits, which are similar to the haws of the European common hawthorn, but plumper.

Crataegus coccinioides: Crataegus coccinioides is a species of hawthorn known by the common names Kansas hawthorn and large-flowered cockspurthorn.  "Crataegus coccinioides" is native from Kansas, to New England, and the southernmost parts of Ontario and Quebec.  It has large flowers and leaves and fruit that appear pinkish until polished to reveal the red colour underneath the wax bloom.  "Crataegus coccinioides" (or its var.  "locuples") is a synonym of "Crataegus dilatata".

Spartium: Spartium junceum, commonly known as Spanish broom or weaver's broom, is a species of flowering plant in the family Fabaceae.

Crataegus punctata: Crataegus punctata is a species of hawthorn known by the common names dotted hawthorn or white haw that is native to most of the eastern United States and eastern Canada.  While some sources claim it is the state flower of Missouri, the actual legislation does not identify an exact species.  Furthermore, the Missouri Department of Conservation asserts the "Crataegus mollis" was specifically designated as the state flower.

Crataegus: Crataegus ( ; from the Greek "kratos" "strength" and "akis" "sharp", referring to the thorns of some species) commonly called hawthorn, thornapple, May-tree, whitethorn, or hawberry, is a large genus of shrubs and trees in the family Rosaceae, native to temperate regions of the Northern Hemisphere in Europe, Asia and North America.  The name "hawthorn" was originally applied to the species native to northern Europe, especially the common hawthorn "C. monogyna", and the unmodified name is often so used in Britain and Ireland.  The name is now also applied to the entire genus and to the related Asian genus "Rhaphiolepis".  The name haw, originally an Old English term for hedge, applies to the fruit.

Rhaphiolepis: Rhaphiolepis ( or ;) is a genus of about fifteen species of evergreen shrubs and small trees in the family Rosaceae, native to warm temperate and subtropical eastern and southeastern Asia, from southern Japan, southern Korea and southern China south to Thailand and Vietnam.  In searching literature it is well to remember that the name commonly is misspelt "Raphiolepsis".  The genus is closely related to "Eriobotrya" (loquats), so closely in fact, that members of the two genera have hybridised with each other; for example the "Coppertone loquat" is a hybrid of "Eriobotrya deflexa" X "Rhaphiolepis indica".  The common name hawthorn, originally specifically applied to the related genus "Crataegus", now also appears in the common names for some "Rhaphiolepis" species.  For example, "Rhaphiolepis indica" often is called "Indian hawthorn", and "Rhaphiolepis umbellata", "Yeddo hawthorn".

Supporting paragraphs: Crataegus Spartium
Answer: Crataegus