Question: Which plant has more species, Maianthemum or Diplolaena?

Context paragraphs:
Diplolaena: Diplolaena is a genus of evergreen shrubs in the family Rutaceae .  They are native to Western Australia.

Maianthemum trifolium: Maianthemum trifolium (syn.  "Smilacina trifolia", Three-leaf Solomon’s-seal, three-leaf Solomon’s-plume, threeleaf false lily of the valley, smilacine trifoliée) is a species of flowering plant that is native to Canada and the northeastern United States, from Yukon and British Columbia east to Newfoundland and south to Delaware.

Maianthemum stellatum: Maianthemum stellatum (star-flowered, starry, or little false Solomon's seal, or simply false Solomon's seal; star-flowered lily-of-the-valley or starry false lily of the valley; syn.  "Smilacina stellata") is a species of flowering plant, native across North America generally from Alaska to California to North Carolina to Newfoundland, plus northern Mexico (Sonora, Chihuahua, Coahuila, Nuevo León).  It has been found in every Canadian province and territory except Nunavut, and from every US state except Hawaii and the states of the Southeast.  It has little white buds in the spring, followed by delicate starry flowers, then green-and-black striped berries, and finally deep red berries in the fall.

Maianthemum racemosum: Maianthemum racemosum (treacleberry, feathery false lily of the valley, false Solomon's seal, Solomon's plume or false spikenard; syn.  "Smilacina racemosa", "Vagnera racemosa") is a species of flowering plant native to North America.  It is a common, widespread plant known from every US state except Hawaii, and from every Canadian province and territory except Nunavut, as well as from Mexico.

Maianthemum: Maianthemum (Latin "Māia " "May" and Greek "ánthemon " "flower"; including former "Smilacina") is a genus of rhizomatous, herbaceous, perennial flowering plants, native to the understory of woodlands.  It is widespread across much of North America, Europe and Asia.

Supporting paragraphs: Maianthemum Diplolaena
Answer: Maianthemum