question: Between Burchardia and Incarvillea which genus is more widely spread?
answer: Incarvillea
context: Title: Incarvillea
  Passage: Incarvillea is a genus of about 16 species of flowering plants in the family Bignoniaceae, native to central and eastern Asia, with most of the species growing at high altitudes in the Himalaya and Tibet.  The most familiar species is "Incarvillea delavayi", a garden plant commonly known as hardy gloxinia or Chinese trumpet flower.  Unlike most other members of Bignoniaceae, which are mainly tropical woody plants, species of "Incarvillea" are herbs from temperate regions.
  Title: Hypericum calycinum
  Passage: Hypericum calycinum is a species of prostrate or low-growing shrub in the flowering plant family Hypericaceae.  Widely cultivated for its large yellow flowers, its names as a garden plant include Rose-of-Sharon in Britain and Australia, and Aaron's beard, Great St-John's wort, and Jerusalem star.  Grown in Mediterranean climates, widely spread in the Strandja Mountains along the Bulgarian and Turkish Black Sea coast.
  Title: Kunai
  Passage: A kunai (苦無 , "kunai" ) is a Japanese tool originally meant for farming in the Tensho Era of Japan (1573 - 1592).  The two widely recognized variations of the kunai are short kunai (小苦無 , "shō-kunai" ) and the big kunai (大苦無 , "dai-kunai" ) .  Although a basic tool, in the hands of a martial arts expert, the kunai could be used as a multi-functional weapon, popular before the widely spread of firearms.  The kunai is commonly associated with the ninja, who used it to gouge holes in walls.  By attaching a rope to the ring, the user could easily climb walls or trees, which required great accuracy when thrown.  The kunai blade was unsharpened, soft iron, and was used for digging, prying, and smashing wood, plaster, and the like -- which would like have destroyed a tool which was sharpened or heat-treated.  Many popular manga and "ninjutsu" characters use kunai as both their primary and secondary weapons.
  Title: Burchardia
  Passage: Burchardia is a genus of herbs that are endemic to Australia.  The genus is named for Johann Heinrich Burkhardt, a German botanist.
  Title: Nosopsyllus fasciatus
  Passage: Nosopsyllus fasciatus, the northern rat flea, is a species of flea found on domestic rats and house mice.  Northern rat fleas are external parasites, living by hematophagy off the blood of rodents.  It is the most widely spread of its genus, having originated in Europe, but has been transported to temperate regions all over the world.
citations: Incarvillea Burchardia