Ophioparma ventosa

Ophioparma ventosa

Observation - Ophioparma ventosa. Description: Both chemical races together: without usnic acid (white-grey thalli) and with usnic acid (yellow-green), each thallus vying for space on the rock, both forms overgrowing the other, and the white one overgrowing itself.

Both chemical races together: without usnic acid (white-grey thalli) and with usnic acid (yellow-green), each thallus vying for space on the rock, both forms overgrowing the other, and the white one overgrowing itself.