lichen
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.commonly called firedot lichen, jewel lichen.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, gold lichens, "orange lichens",USDA Natural Resources Conservation Service Name Search /ref> but they are not always orange, as in the case of '' C. albovariegata''.Plants Profile for Caloplaca (orange lichen), USDA /ref> The distribution of this lichen genus is worldwide, extending from Antarctica to the high Arctic. It includes a portion of northern North America and the Russian High Arctic. There are about thirty species of ''Caloplaca'' in the flora of the British Isles. An example species in this genus is '' Caloplaca saxicola'', a lichen with worldwide distribution including the Antarctic continent, Europe and northern North America including the northern reaches of the Canadian boreal forests.
A new species of ''Caloplaca'', '' C. obamae'', the first species to be named in honor of Barack Obama, was discovered in 2007 on Santa Rosa Island in California and published in March 2009.
Caloplaca chrysodeta
''Caloplaca'' is a lichen genus comprising a number of distinct species. Members of the genus are commonly called firedot lichen, jewel lichen.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, gold lichens, "or ...
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Image:Caloplaca citrina-2.jpg, ''
Caloplaca citrina
''Caloplaca'' is a lichen genus comprising a number of distinct species. Members of the genus are commonly called firedot lichen, jewel lichen.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, gold lichens, "ora ...
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Image:Caloplaca feracissima-2.jpg, ''
Caloplaca feracissima
''Caloplaca'' is a lichen genus comprising a number of distinct species. Members of the genus are commonly called firedot lichen, jewel lichen.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, gold lichens, "or ...
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Image:Caloplaca flavorubescens.jpg, ''
Caloplaca flavorubescens
''Caloplaca'' is a lichen genus comprising a number of distinct species. Members of the genus are commonly called firedot lichen, jewel lichen.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, gold lichens, "ora ...
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Image:Caloplaca flavovirescens.jpg, ''
Caloplaca flavovirescens
''Caloplaca'' is a lichen genus comprising a number of distinct species. Members of the genus are commonly called firedot lichen, jewel lichen.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, gold lichens, "ora ...
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Image:Caloplaca ignea Arup 711912 crop.jpg, ''
Caloplaca ignea
''Igneoplaca'' is a genus in the subfamily Xanthorioideae of the family Teloschistaceae. It contains a single species, the crustose lichen ''Igneoplaca ignea''.
Taxonomy
This species was first formally described in 1995 by Swedish lichenologis ...
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Image:Caloplaca luteoalba-1.jpg, ''
Caloplaca luteoalba
''Caloplaca'' is a lichen genus comprising a number of distinct species. Members of the genus are commonly called firedot lichen, jewel lichen.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, gold lichens, "ora ...
Caloplaca sideritis
''Caloplaca'' is a lichen genus comprising a number of distinct species. Members of the genus are commonly called firedot lichen, jewel lichen.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, gold lichens, "ora ...
Caloplaca xanthostigmoidea
''Caloplaca'' is a lichen genus comprising a number of distinct species. Members of the genus are commonly called firedot lichen, jewel lichen.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, gold lichens, "ora ...
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Image:Caloplaca feracissima-8.jpg, Spore from an acus in an apothecium of ''C. feracissima''; photographed through a compound microscope, ×1000