More than 80% of Madagascar's 14,883 plant species are found nowhere else in the world, including five plant families. The family
Didiereaceae, composed of four genera and 11 species, is limited to the spiny forests of southwestern Madagascar. Four-fifths of the world's
Pachypodium species are endemic to the island. Three-fourths of Madagascar's 860
orchid species are found there alone, as are six of the world's nine
baobab species. The island is home to around 170 palm species, three times as many as on all of How much do you know about Iceland.