Lichens ( algae and fungi) are commonly associated to Dyckias on the rocks.
Lichens seem to play a vital role here.
Bare rocks can only home and give chance to lichens grow and decaying lichen is the prime material for Dyckia seed germination and survival.
Lichen play a fundamental role here.
They trap and hold the Dyckia seeds and fed the germinating ones.
This association Lichen and Dyckia soon gets another partner the mosses. See it here forming a carpet.
This holds humidity and Dyckia really relishes on it.
One must have eyes to see and brains to think.
Dyckia are not on bare rock.
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