The term "crystal" in their common name "crystal flora" refers only to their shape. Crystal flora do not refract light like real crystals, and their interior is usually opaque.
Basal Crystal Flora which have one or very few large photosynthetic crystals.
Moss- or shrub-like crystal flora with many small crystal leaves.
Unrooted, slow-moving Crystal Flora with long crystal "arms".
Crystal Flora with vastly exposed fungal core.
Deep-sea Crystal Flora which photosynthesize using the dim light of hydrothermic vents and produce sulfur instead of oxygen.
Crystal Flora with mineralized, bone-like trunks.
Non-photosynthetic crystal flora which are well-known for encrusting dead organisms in large numbers.