fruticose - free-standing branching tubes. 5. Arkansas probably has about 300 kinds of lichens counting the foliose and fruticose types, but no one knows for sure how many crustose types there are. ADVERTISEMENTS: 3. Difference # Lichens: 1. In foliose lichens with multiple branches of the thallus that may stand away from the substrate, the differentiated lower cortex distinguishes them from fruticose lichens, e.g. In the tundra region of the far north, the principle winter browse of reindeers is reindeer moss, the same species that occurs here. The macrolichens have comparatively larger thallus and a hand-lens, dissection or stereozoom microscope is sufficient to identify them. Can grow on barren substratum under drought and starvation conditions. Grow freely exposed to air and light and dislike smoky atmosphere of towns. 10004 ABSTRACT Lichens were surveyed in a relatively uncollected region composed of parts of Gallia, Meigs, Athens, and … The foliose, dimorphic and fruticose lichens on the other hand are called as macrolichens . Foliose lichens are leafy or stringy and are often found growing on the ground or around trees. A microscope is often needed to tell the difference between lichen and moss. Lichens are edible – well sort of. Beside above, what is the example of lichen? foliose - leaflike, with flat sheets of tissue not tightly bound. Ried (1960b) indicated that crustaceous lichens are comparable in this respect to noncrustaceous forms. Summarizing the existing data about water-retention ability of lichens, we can say that the saturated water content of most fruticose and foliose lichens lies between (130) 150–300% of the dry weight. First we learnt the difference between lichen and liverworts, and that all lichen are a fungal species living symbiotically with an algal species. Grow generally as epiphytes or as terrestrial autophytes. We next examined the basic structure of a lichen thallus cross-section: an upper skin or cortex with a layer of photosynthetic algae below (these are often referred to as photobiants). THE FOLIOSE AND FRUTICOSE LICHEN FLORA OF THE OHIO RIVER VALLEY BETWEEN GALLIPOLIS, OHIO, AND PARKERSBURG, WEST VIRGINIA RAY E. SHOWMAN Environmental Engineering Division, American Electric Power Service Corporation, 2 Broadway, New York, N. Y. Evernia prunastri, in which the thallus lobes are white beneath, and Pseudevernia furfuracea, in … Rather, it is a symbiosis between different organisms - a fungus and an alga or cyanobacterium. 2. The crustose, foliose, squamulose, placodioid and sometimes, dimorphic forms of lichens usually grow in a circular and centripetal manner. 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