From Longman Dictionary of Contemporary Englishbegoniabe‧go‧ni‧a /bɪˈɡəʊniə $ -ˈɡoʊ-/ noun [countable] 
HBPa plant with yellow, pink, red, or white flowers
HBPa plant with yellow, pink, red, or white flowersExamples from the Corpus
begonia• Does it look like a begonia?• Topical tip Check any impatiens and begonias that you intend to over-winter indoors.• That first December 1904 issue featured begonias, as does the January 1996 issue.• However well you treat them, after two to three years these foliage begonias lose their compact appearance and look straggly.• A waterfall of begonias, of every colour known to the plant breeders of the 1960s, filled the conservatory.• I recently planted beds with salvia, begonias, petunias and geraniums.• A visit to any of their shows is a delight and you can see begonias at their best.• I place my three long-stemmed, red roses beside the begonias.Origin begonia (1700-1800) Modern Latin from Michel Bégon (1638-1710), French governor of Santo Domingo, who discovered the plant 