Irish lichens

Callome multipartita, Collema multipartitum

Order: Peltigerales       Family: Collemataceae

Species: Callome multipartita (Collema multipartitum)

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

Thallus rounded or irregular, much branched and deeply lobed. Lobes loosely appressed to partly ascending, narrow, fan-shaped, irregular in shape and +/- contorted. Apothecia frequent, isidia absent. The asci are clavate with strongly thickened apices, spores 3-septate, 26-43 x 4.5-6.5 Ám, sometimes slightly curved. Micrographs below.

On hard, exposed limestone. Frequent in the Burren, scattered distribution elsewhere in Ireland. Chemical reactions negative. Often occurs with Collema polycarpon.

Collema multipartitum

Collema multipartitum

Collema multipartitum

Microscope photographs
Collema multipartitum
Callome multipartita (Collema multipartitum). The Burren, Ireland. July 2009

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