Question: Which genus, Shortia or Schizophragma, has more species?

Context paragraphs:
Shortia: Shortia is a small genus of subshrubs or perennial herbs in the family Diapensiaceae.  There are five species, four in Asia and one in the Appalachian Mountains of eastern North America.  They are found in mountainous areas, generally from 1000 – elevation.  All have restricted ranges and are generally considered rare.  Three of the species, "S. galacifolia", "S. soldanelloides", and "S. uniflora" are often cultivated.  The genus was by Asa Gray named after botanist Charles Wilkins Short.  In Gray's diary entry for April 8, 1839, he named the genus after Charles Wilkins Short because the plant was native to America in a region close to where Short lived, which was Kentucky.  Short and Gray never met but they corresponded with one another frequently.  Short never saw a live nor dried specimen of his namesake genus.

Schizophragma: Schizophragma (hydrangea vine) is a genus of four species of flowering plants in the family Hydrangeaceae, native to moist woodland in Asia, from the Himalayas east to Taiwan and Japan.  They are vigorous, hardy deciduous lianas growing to 12 m , cultivated for their showy flower heads borne in mid- to late summer, resembling those of the related lacecap hydrangeas.

Diapensiaceae: Diapensiaceae is a small family of flowering plants, comprising 12 species in five genera.  Three of the genera, "Berneuxia", "Galax", and "Pyxidanthera", contain only a single species.  The Asian species of "Shortia" were formerly separated as the genus "Schizocodon", and some authors still recognize "S. soldanelloides" under that name.  Another genus, "Diplarche", was included in the family by some authors but is now regarded as a member of Ericaceae.

Supporting paragraphs: Shortia Schizophragma
Answer: Shortia