These
Sophronitis (now
Cattleya) are hardly relevant to rock gardening in temperate climes, but grow on moss-covered rocks and trees at altitude in SE Brazil.
Apart from their intense colour, the tepals of
S. mantiqueirae have a lovely crystalline quality rather like
Nerine sarniensis that I find hard to photograph.
In any case they brighten up dull winter weather here.
Sophronitis (
Cattleya)
mantiqueirae 
Sophronitis (
Cattleya)
wittigiana
