Xanthomendoza fallax

Xanthomendoza fallax (hooded sunburst lichen) is a small yellow-orange to red-orange fioliose lichen that grows on bark, rarely on rock, all over the world except very dry areas.^[1]:130[2] The nonfruiting body (thallus) grows in rosettes to 3 cm in diameter.^[1][2] The rosettes sometimes coalesce with each other.^[2] The lobes may appear divided at the tips. It is sometimes tightly appressed to the substrate (adnate), and sometimes not.^[1][2] The fruiting bodies (apothecia) are lecanorine, meaning that they are disc-like with a ring or rim of tissue around the disc that is made of tissue similar to the thallus.^[1] The tips of the lobes form hood shaped soralia that produce powdery greenish yellow soredia.^[1] It prefers growing on oak bark in California, but can also be found on rock and other wood.^[1] Lichen spot tests on the surface are K+ purple, C-, KC-, and P-.^[1]

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