question: Which genus consists of more species, Malus or Bertolonia?
answer: Malus
context: Title: Apple
  Passage: The apple tree ("Malus pumila", commonly and erroneously called "Malus domestica") is a deciduous tree in the rose family best known for its sweet, pomaceous fruit, the apple.  It is cultivated worldwide as a fruit tree, and is the most widely grown species in the genus "Malus.  "The tree originated in Central Asia, where its wild ancestor, "Malus sieversii", is still found today.  Apples have been grown for thousands of years in Asia and Europe, and were brought to North America by European colonists.  Apples have religious and mythological significance in many cultures, including Norse, Greek and European Christian traditions.
  Title: Malus
  Passage: Malus ( or ) is a genus of about 30–55 species of small deciduous apple trees or shrubs in the family Rosaceae, including the domesticated orchard apple ("M. pumila").  The other species are generally known as crabapples or wild apples.
  Title: Malus kansuensis
  Passage: Malus kansuensis is a species in the genus "Malus" in the family Rosaceae, called with the common name Calva crabapple.  A tree of this variety would produce a yellow fruit in the size a half an inch.  The white flowers are about 2 inches across.
  Title: Malus sublobata
  Passage: Malus sublobata is the botanical name for the yellow autumn crabapple, it is a species of the genus malus in the family Rosaceae, native to Japan.
  Title: Malus transitoria
  Passage: Malus transitoria, the cut-leaf crabapple, is a species of flowering plant in the crabapple genus "Malus" of the family Rosaceae.
  Title: Malus sargentii
  Passage: Malus sargentii, occasionally called Sargent's apple or Sargent crabapple, is a species of crabapple in the genus "Malus".  The species was formerly considered a variety of the species "Malus sieboldii".  The plant is a shrub growing about 6 feet tall.  "Malus sargentii" is native to Japan but is commonly used as an ornamental shrub elsewhere.
  Title: Malus trilobata
  Passage: Malus trilobata, the Lebanese wild apple, erect crab apple or three-lobed apple tree, is a species in the family Rosaceae in the genus "Malus".  Some authorities place it in the segregate genus "Eriolobus", as "Eriolobus trilobatus".
  Title: Malus doumeri
  Passage: Malus doumeri is a species in the genus "Malus" in the family Rosaceae, that resembles "Docynia" and has been placed in that genus in the past.  It is native to temperate and tropical Asia.  The fruit is edible.
  Title: Malus yunnanensis
  Passage: Malus yunnanensis is a species in the genus malus, family Rosaceae, with the common name Yunnan crabapple, in China it is called "chuan e dian chi hai tang".
  Title: Bertolonia
  Passage: Bertolonia is a genus consisting of 14 species of pretty, dwarf, creeping, tender perennials, native to tropical South America.  These herbaceous plants are grown for their colorful, velvety, ornamental foliages, vary from shimmery white with purple, pink with purple, or bronze-green with carmine and lighter midribs, purple beneath.  Leaves are coarsely hairy, oval 7cm (3in) long on short stalks.  The plants bear clusters of small, bell-shaped flowers repeatedly, just above the leaves, color ranges from pink, red, yellow to purple.
citations: Bertolonia Malus