Amygdalaria
''Amygdalaria'' is a genus of lichen-forming fungi in the family Lecideaceae. These lichens are typically found growing as crustose lichen, crusts on siliceous rocks in arctic and alpine environments. Members of this genus form crustose thallus, thalli and are distinguished by their unusually large, smooth ascospores enclosed in gelatinous sheaths. The lichens have cephalodia containing ''Stigonema'', a blue-green alga that enables nitrogen fixation. Taxonomy The genus was circumscription (taxonomy), circumscribed in 1852 by the Norwegian botanist Johannes M. Norman, Johannes Musæus Norman. In his original description, Norman characterized ''Amygdalaria'' as having large, oval, flattened, single-locule spores surrounded by a thickened hyaline wall with white margins. He noted that the apothecia (fruiting bodies) are dish-shaped. Norman distinguished the genus from ''Pertusaria'' not only by the similar shape of the spores but also by the open connection of the spore chambers. ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]