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Crustose lichen forms a thin crust adhering closely to the substratum. In some cases, this crust may be thick and lumpy, and may be detached, in part, or submerged below its surface. The thallus of a crustose lichen is usually only discernible because of the discolouration of the substrate. Some crustose lichens have thalli consisting of ...
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]
Arthonia radiata is a crustose lichen with an immersed thallus, often separated from its surroundings by a thin brown line.The thallus is typically pale, ranging from white to pale grey, sometimes with a brown or olive tinge, and often forms a mosaic-like pattern on its substrate.
Ahead, you’ll find pictures of common skin rashes, plus symptoms to look out for. It’s important to note that rashes can look different depending on your skin tone. ... Lichen planus. What it ...
Cryptothecia rubrocincta is a crustose lichen, because it grows in the form of a surface crust. The thallus, or body of the lichen is spread out flat and can be either tightly to loosely attached to the growing surface. It is 0.15–0.30 mm thick, and can be smooth, or have low radiating ridges.
26 pictures of skin rashes to help you identify your skin rash. Plus, doctor-approved at-home skin rash remedies and when to see a doctor for your skin rash. ... If symptoms worsen, or you have ...
Candelariella antennaria is a crustose lichen best characterized by its yellow apothecia, which make up the majority of the visible lichen. The apothecial disc is a lemon-yellow or orange-yellow, flat, and not exceeding 1 mm in diameter. [3] The disc may test K negative, or reddish. [3]
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