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Petrolignopsida are a class of Crystal Flora which are distinguished by their mineralized, bone-like trunks. They include some of the earliest multicellular organisms on land.


Order Solacoronales

Petrolignopsids with a single, non-branching trunk with a head of crystals on top.

Order Crystallopellales

Petrolignopsids which have mineralized above-ground root and branch systems covered in small clusters of crystals.