Irish lichens

Collema fuscovirens
Order: Peltigerales       Family: Collemataceae

Species: Collema fuscovirens

Growth type foliose.
Photos: On limestone. The Burren, Co. Clare, Ireland.

Leathery, deep-lobed thallus with dark olive-green to blackish lobes, paler below. Swelling little when wet but slightly transluscent. Apothecia sparse or frequent, margins smooth or isidiate. Thinner lobes and smaller isidia than C. auriforme.

Occurs on sunny limestone outcrops and dry stone walls.
Chemical reactions negative.

Similar: C. auriforme. Lobes very swollen when wet.


Collema fuscovirens


Collema fuscovirens


Collema fuscovirens
Collema fuscovirens March and July 2009

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