Irish lichens
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Order: Peltigerales
Family: Collemataceae
Species: Lathagrium fuscovirens (Collema fuscovirens)
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 can be sparse or frequent, margins smooth or isidiate. Lobes are thinner and isidia smaller than those of C. auriforme. Occurs on sunny limestone outcrops and dry stone walls. Chemical reactions negative. Similar: C. auriforme. Lobes very swollen when wet. |
Collema fuscovirens March and July 2009