Blossfeldia liliputana
Name: from the fictional country of Lilliput, with minute inhabitants.
Genus: 1 species.
Region: South America, Argentina, Bolivia.
Botany: grows at high altitude in the Andes, in rock crevices, close to waterfalls; smallest cactus in the world, 1 cm wide; flowers white, rarely pink, ± 1cm long.