Question: Does Wikstroemia or Witch-hazel have more species?

Context paragraphs:
Wikstroemia coriacea: Wikstroemia coriacea is a species of plant in the Thymelaeaceae family.  It is endemic to French Polynesia.

Wikstroemia: Wikstroemia is a genus of 55-70 species of flowering shrubs and small trees in the mezereon family, Thymelaeaceae.  Hawaiian species are known by the common name false ohelo.

Wikstroemia johnplewsii: Wikstroemia johnplewsii, common name Hiva Oa Ohelo, is a plant species endemic to the island of Hiva Oa in the Marquesas Islands, French Polynesia.  It is found at relatively high altitudes in the mountains, at elevations over 600 m.  The only other member of the genus reported from the Marquesas is "W. coriacea" (sometimes erroneously called "W. foetida").  "Wikstroemia coriacea" has narrower leaves and smaller inflorescences than.  "W. johnplewsii".

Wikstroemia oahuensis: ʻ Ākia or Oʻ ahu false ohelo (Wikstroemia oahuensis) is a species of flowering shrub in the mezereon family, Thymelaeaceae, that is endemic to Hawaiʻ i.

Wikstroemia skottsbergiana: Wikstroemia skottsbergiana (also called Skottsberg's false ohelo and Skottsberg's wikstroemia) was a species of flowering plant in the Thymelaeaceae family.  It was endemic to the island of Kauaʻ i in Hawaiʻ i, but became extinct due to habitat loss.

Wikstroemia villosa: Wikstroemia villosa, with the common names hairy wikstroemia and hairy false ohelo, is a tropical species of plant in the Thymelaeaceae family.

Wikstroemia bicornuta: Wikstroemia bicornuta, the alpine false ohelo, is a species of flowering plant in the mezereon family, Thymelaeaceae, that is endemic to Hawaii.  It inhabits mixed mesic and wet forests at elevations of 900 – on the islands of Lānaʻ i and Maui.  It is threatened by habitat loss.

Witch-hazel: Witch-hazels ("Hamamelis," ) are a genus of flowering plants in the family Hamamelidaceae, with four species in North America ("H. mexicana", "H. ovalis", "H. virginiana", and "H. vernalis"), and one each in Japan ("H. japonica") and China ("H. mollis").  The North American species are occasionally called winterbloom.

Hamamelis virginiana: Hamamelis virginiana, known as common or American witch-hazel, is a species of witch-hazel native to eastern North America, from Nova Scotia west to Minnesota, and south to central Florida to eastern Texas.

Dicerca pugionata: Dicerca pugionata is a species of buprestid beetle from the Chrysochroinae subfamily that occurs in the Eastern North America.  Its food includes witch-hazel species including "Hamamelis virginiana" in mid July.  It also feeds on ninebark and alder species.

Supporting paragraphs: Wikstroemia Witch-hazel
Answer: Wikstroemia