Bursera fagaroides is a species of flowering plant in the genus "Bursera" known by the common names torchwood copal and fragrant bursera.
 It is widespread across much of Mexico from Sonora to Oaxaca, and its range extends just into Arizona in the United States, although some sources suggest that it may now be extirpated in Arizona.
Berzelia is a genus consisting of 12 species of upright, wiry stemmed, evergreen shrubs with a dense covering of small, fine, needle-like leaves.
 The flowers which appear in spring and summer, are minute but are packed in spherical clusters, of which there are several per head of bloom.
 The flowers are white to cream and, because the stamens extend beyond the tiny petals, the flowerheads appear to be studded with protrusions.
Bdallophytum is a genus of parasitic flowering plants with five described species.
 It parasitizes on the roots of plants of the genus "Bursera", such as "Bursera simaruba".
 The genus is endemic to the Neotropics.
Protium is a genus of more than 140 species of flowering plants in the family Burseraceae.
 It is native to the Neotropics (where more than 100 species occur), Madagascar, New Guinea, and southern Asia from Pakistan east to Vietnam.
 The genus was for some time included in "Bursera", but is distinct, being most closely related to "Crepidospermum" and "Tetragastris".
"Bursera microphylla" is a North American species of tree in the Frankincense Family in the soapwood order.
 Bursera microphylla, known by the common name elephant tree in English or 'torote' in Spanish, is a tree in genus "Bursera".
 It grows into a distinctive sculptural form, with a thickened, water-storing or caudiciform trunk.
 It is found in the southwestern United States and northwestern Mexico.
Bursera, named after the Danish botanist Joachim Burser (1583-1639), is a genus with about 100 described species of flowering shrubs and trees varying in size up to 25 m high.
 They are native (often for many species endemic) to the Americas, from the southern United States south through to northern Argentina, in tropical and warm temperate forest habitats.

Question: Which genus has more species, Bursera or Berzelia?
Answer: Bursera