Search results
Results From The WOW.Com Content Network
A crustose lichen, as its name suggests, is crust-like and two-dimensional, closely and completely bound at nearly all points to the substrate on which it grows. It typically cannot be removed from the substrate without at least partial destruction of one or the other. [ 23 ]
Crustose lichens on a wall Growth of crustose lichen on a tree trunk. Crustose lichens are lichens that form a crust which strongly adheres to the substrate (soil, rock, tree bark, etc.), making separation from the substrate impossible without destruction. [1] The basic structure of crustose lichens consists of a cortex layer, an algal layer ...
Mycobilimbia australis is a crustose (crust-forming) lichen that forms a spreading, uneven, dull-coloured patch ranging from pale greyish to brownish or greenish grey. The lichen's main body takes on the texture of whatever surface it grows on and is typically dotted with small black-brown spots that are either developing or aborted reproductive structures.
A lichen (/ ˈ l aɪ k ən / LIE-kən, UK also / ˈ l ɪ tʃ ən / LI-chən) is a hybrid colony of algae or cyanobacteria living symbiotically among filaments of multiple fungi species, along with yeasts and bacteria [1] [2] embedded in the cortex or "skin", in a mutualistic relationship.
Flavoplaca citrina is a crustose (crust-like) lichen with a yellow-green thallus (the main body of the lichen). The thallus is pulverulent (powdery) and entirely covered with granular soredia (tiny, powdery reproductive propagules). It can vary from thin to moderately thick and is usually soft.
Lichens also sometimes contain structures made from fungal metabolites, for example crustose lichens sometimes have a polysaccharide layer in the cortex. Although each lichen thallus generally appears homogeneous, some evidence seems to suggest that the fungal component may consist of more than one genetic individual of that species.
Buellia frigida is a species of saxicolous (rock-dwelling), crustose lichen in the family Caliciaceae. It was first described from samples collected from the British National Antarctic Expedition of 1901–1904. It is endemic to maritime and continental Antarctica, where it is common and widespread, at altitudes up to about 2,000 m (6,600 ft).
The cortex, or outer layer, of the lichen exhibits several distinct types: False cortex, which resembles a cortex but does not function as one. Cortex consisting of irregular hyphae, characterized by long and narrow cell lumina (the spaces within the hyphae). Paraplectenchymatous cortex, featuring closely packed hyphae.