2015-12-24 · Alpine Pearlflower. Cryptandra alpina Hook.f.. Cryptandra alpina, commonly known as alpine pearlflower, is from the family Rhamnaceae.The Rhamnaceae family consists of 58 genera worldwide, including 18 Australian genera. Cryptandra is an endemic Australian genus, consisting of 40 species.. Cryptandra alpina is a small, prostrate, woody plant that grows up to 20cm high, with many …