I first saw this Selaginella kraussiana 'Brownii' (Synonym: Lycopodium kraussianum 'Brownii'; Family: Selaginellaceae) in Philippines about 4 years back and we bought some back. Amongst the Selaginella species, this is quite a sensitive one and is not easy to grow.
Now there are some clusters of this Selaginella at the Discovery Garden. This is also the area where I saw the Bird's Nest Fungi. How fascinating!