Pterostyrax, the epaulette tree, is a small genus of four species of deciduous large shrubs or small trees in the family Styracaceae, native to eastern Asia in China and Japan.
 They grow 4 - tall, with alternate, simple ovate leaves 6 - long and 4 - broad.
 The flowers are white, produced in dense panicles 8 - long.
 The fruit is an oblong dry drupe, with longitudinal ribs or narrow wings (the wings are absent in the related genus "Styrax", whence the name "Pterostyrax", "winged styrax").
Storax or snowbell is the common names of Styrax, a genus of about 130 species of large shrubs or small trees in the family Styracaceae, mostly native to warm temperate to tropical regions of the Northern Hemisphere, with the majority in eastern and southeastern Asia, but also crossing the equator in South America.
 The resin obtained from the tree is called storax or benzoin (not to be confused with the "Liquidambar" storax balsam).
Styrax fraserensis is a species of flowering plant in the genus "Styrax" and family Styracaceae.
 It is a tree endemic to Peninsular Malaysia.
 It is threatened by habitat loss.
Benzoin or benjamin is a balsamic resin obtained from the bark of several species of trees in the genus "Styrax".
 It is used in perfumes, some kinds of incense, as a flavoring, and medicine (see tincture of benzoin).
 It is distinct from the chemical compound benzoin, which is ultimately derived from benzoin resin; the resin, however, does not contain this compound.
Myosotidium is a genus of plants belonging to the family Boraginaceae.
 This genus is represented by the single species Myosotidium hortensia, the giant forget-me-not or Chatham Islands forget-me-not, which is endemic to the Chatham Islands, New Zealand.
 The biogeography is yet unresolved, but its ancestors are likely from the American continent, as "Myosotidium hortensia" was found to be sister to the South American plant genus "Selkirkia" and both genera being sister to the North American genus "Mimophytum".
Styrax litseoides is a species of flowering plant in the genus "Styrax" and family Styracaceae.
 It is endemic to Vietnam.
Styrax vilcabambae (syn.
 "Pamphilia vilcabambae" D.R.Simpson) is a species of flowering plant in the genus "Styrax" and the family Styracaceae.
 It is endemic to Peru.
Styrax crotonoides is a species of plant in the genus "Styrax" and family Styracaceae.
 It is found in Peninsular Malaysia and Singapore.

Question: Which genus has more species,  Styrax or Myosotidium?
Answer: Styrax