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Chrysothrix candelaris, commonly known as the mustard powder lichen [1] or gold dust lichen, [2] is a species of leprose (powdery) lichen in the family Chrysothricaceae. It typically grows on tree bark , although it has also been recorded growing on rock .
Ramalina menziesii, the lace lichen or fishnet, is a pale yellowish-green to grayish-green fruticose lichen. It grows up to a meter long, hanging from bark and twigs in a distinctive net-like or lace-like pattern that is unlike any other lichen in North America. [3] It becomes a deeper green when wet. [3] Apothecia are lecanorine. [3]
A leprose lichen, which is typically considered to be a form of crustose lichen, is one with a powdery or dust-like appearance. Its undifferentiated thallus is an irregular mix of fungal hyphae and scattered photobiont cells, lacking a cortex or any definable layers. [6] [47] Morphologically, it is the simplest growth form. [48]
The IAL has established various committees to address specific aspects of lichenology. The Lichen Terminology Committee, for instance, was responsible for developing an IAL-approved definition of a lichen: "A lichen is an association of a fungus and a photosynthetic symbiont resulting in a stable thallus of specific structure". [3]
The lichen is composed of two thalli; an initial primary squamulose thallus growing across bark in a scaly, flaking pattern, followed by a secondary fruticose thallus (), with cup shaped podetia (4-10cm tall) bearing terminal ascocarps contained in apothecial structures.
Enchylium polycarpon, commonly known as the shaly jelly lichen, is a species of foliose lichen in the family Collemataceae. Formerly known as Collema polycarpon, it was renamed in 2013 following a taxonomic revision. This lichen has a widespread global distribution, occurring in various regions of North America, Europe, Africa, and Asia.
Parmotrema is a genus of lichen belonging to the family Parmeliaceae. [1] It is a large genus, containing an estimated 300 species, [2] with a centre of diversity in subtropical regions of South America and the Pacific Islands. [3] Members of the genus are commonly called ruffle lichens or scatter-rag lichens. [4]: 83