Pygmyweed

Crassula tetragona is a member of the Crassulaceae family and is found in Southern Africa, particularly from the Orange River to the Kei River in the Eastern Cape. It has been reported in various regions including Madeira, North America, Italy, Portugal, Sicily, Australia, Brazil, the United States, New Zealand, and South Australia. The species was originally described by Linnaeus in 1753. Due to a neotypification by Heath, C. caffra is now considered a homotypic synonym of C. tetragona. Earlier treatments, such as those by Toelken, considered the species insufficiently known due to the absence of type material, but this has since been resolved. The plant is known for its distinctive leaf arrangement and is sometimes cultivated for ornamental purposes.