Rhizoplaca chrysoleuca
Rhizoplaca chrysoleuca
''Rhizoplaca chrysoleuca'' is a pale yellowish-green to gray-green umbillicate foiliose lichen . It was first described in 1791 by English botanist Sir James Edward Smith as ''Lichen chrysoleucus''; Friedrich Wilhelm Zopf transferred it to the genus ''Rhizoplaca'' in 1905.
The single-leaf umbillicate thallus can be 2–3.5 cm in width, with deep lobes. The thallus is relatively thick and lumpy with warts and lobules. The fruiting structures . It prefers siliceous rock, granite, schist, quartz, mica, and basalt, but is also found on sandstone and less commonly on calcareous rock. It grows from the high desert to the alpine zone. It is often nitrophilous, preferring dropping areas under bird perches. It is common on rock in inland arid mountain and desert habitats in California.:118
Lichen spot tests are K+ yellow or K-, KC+ yellow-orange, C-, and P- on the cortex, and K-, KC+ red or KC-, C-, and P+ yellow or P- on the medulla.
The single-leaf umbillicate thallus can be 2–3.5 cm in width, with deep lobes. The thallus is relatively thick and lumpy with warts and lobules. The fruiting structures . It prefers siliceous rock, granite, schist, quartz, mica, and basalt, but is also found on sandstone and less commonly on calcareous rock. It grows from the high desert to the alpine zone. It is often nitrophilous, preferring dropping areas under bird perches. It is common on rock in inland arid mountain and desert habitats in California.:118
Lichen spot tests are K+ yellow or K-, KC+ yellow-orange, C-, and P- on the cortex, and K-, KC+ red or KC-, C-, and P+ yellow or P- on the medulla.