Fruticose lichens have rounded structures and a branched appearance.

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Lichens are categorized into three primary growth forms based on their morphology: crustose lichens, which are tightly attached to their substrate and have a crust-like appearance; foliose lichens, which feature leaf-like lobes and are attached at a single point; and fruticose lichens, which have rounded, branched structures.

Types of Lichens

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Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

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Lichens that obtain a crust appearance by tightly attaching to their substrate. 

Crustose Lichens

Foliose Lichens have leaf-like lobes and may only be attached at one point in the growth form. They contain a second cortex below their medulla. 

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