This tropical club moss from Southeast Asia is known by several names. The accepted name (according to PPG 1) is Phlegmarius squarrosus, but in most sources one finds the name Huperzia squarrosa or Lycopodium squarrosum.
No matter what the name really is, this beautiful spore plant is a real eye-catcher in any tropical terrarium. It grows hanging or creeping and can reach considerable lengths of several metres.