MAP: MELBOURNE STREET TREES 33

Bougainvillea is a genus of flowering plants native to South America from Brazil west to Perú and south to southern Argentina (Chubut Province). Different authors accept between four and 18 species in the genus.They are thorny, woody vines growing anywhere from 1 to 12 metres tall, scrambling over other plants with their spiky thorns. The thorns are tipped with a black, waxy substance. They are evergreen where rainfall occurs all year, or deciduous if there is a dry season. The leaves are alternate, simple ovate-acuminate, 4–13 cm long and 2–6 cm broad. The actual flower of the plant is small and generally white, but each cluster of three flowers is surrounded by three or six bracts with the bright colours associated with the plant, including pink, magenta, purple, red, orange, white, or yellow. Bougainvillea glabra is sometimes referred to as "paper flower" because the bracts are thin and papery. The fruit is a narrow five-lobed achene.

Many of today's bougainvillea are the result of interbreeding among only three out of the eighteen South American species recognized by botanists. Currently, there are over 300 varieties of bougainvillea around the world. Because many of the hybrids have been crossed over several generations, it is difficult to identify their respective origins. Natural mutations seem to occur spontaneously throughout the world; wherever large numbers of plants are being produced, bud-sports will occur. This had led to multiple names for the same cultivar (or variety) and has added to the confusion over the names of bougainvillea cultivars. This particular type illustrated has a stocky, upright, "tree-like" habit with abundant flowers. Bougainvilleas grow luxuriantly in Melbourne's climate.

This post is part of the Floral Friday Fotos meme.