|
Porpidia Circumnigrata
''Porpidia'' is a genus of crustose lichens in the family Lecideaceae. ''Porpidia'' species primarily inhabit siliceous rocks, pebbles, and stonework, with rare occurrences on bark, wood, and compacted soil. The thallus, or body of the lichen, varies in appearance from thick and crusty to barely visible. It may form a continuous layer or develop cracks resulting in a segmented, structure. The colour of the thallus ranges from grey and white to orange. Taxonomy ''Porpidia'' was circumscription (taxonomy), circumscribed by the German lichenologist Gustav Wilhelm Körber in 1855, with ''Porpidia trullisata'' designated as the type species. Description Genus ''Porpidia'' consists of crustose lichens, meaning the thallus (the main body of the lichen) is closely attached to the surface it grows on. The thallus can vary in appearance, from thick and scaly to almost invisible, and may be solid or cracked into small pieces called . Its colour typically ranges from grey to white, thoug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green Algae
The green algae (: green alga) are a group of chlorophyll-containing autotrophic eukaryotes consisting of the phylum Prasinodermophyta and its unnamed sister group that contains the Chlorophyta and Charophyta/ Streptophyta. The land plants ( Embryophytes) have emerged deep within the charophytes as a sister of the Zygnematophyceae. Since the realization that the Embryophytes emerged within the green algae, some authors are starting to include them. The completed clade that includes both green algae and embryophytes is monophyletic and is referred to as the clade Viridiplantae and as the kingdom Plantae. The green algae include unicellular and colonial flagellates, most with two flagella per cell, as well as various colonial, coccoid (spherical), and filamentous forms, and macroscopic, multicellular seaweeds. There are about 22,000 species of green algae, many of which live most of their lives as single cells, while other species form coenobia (colonies), long filaments ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porpidia Circumnigrata
''Porpidia'' is a genus of crustose lichens in the family Lecideaceae. ''Porpidia'' species primarily inhabit siliceous rocks, pebbles, and stonework, with rare occurrences on bark, wood, and compacted soil. The thallus, or body of the lichen, varies in appearance from thick and crusty to barely visible. It may form a continuous layer or develop cracks resulting in a segmented, structure. The colour of the thallus ranges from grey and white to orange. Taxonomy ''Porpidia'' was circumscription (taxonomy), circumscribed by the German lichenologist Gustav Wilhelm Körber in 1855, with ''Porpidia trullisata'' designated as the type species. Description Genus ''Porpidia'' consists of crustose lichens, meaning the thallus (the main body of the lichen) is closely attached to the surface it grows on. The thallus can vary in appearance, from thick and scaly to almost invisible, and may be solid or cracked into small pieces called . Its colour typically ranges from grey to white, thoug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species Fungorum
''Index Fungorum'' is an international project to index all formal names (Binomial nomenclature, scientific names) in the fungus Kingdom (biology), kingdom. As of 2015, the project is based at the Royal Botanic Gardens, Kew, one of three partners along with Landcare Research New Zealand Limited, Landcare Research and the Institute of Microbiology, Chinese Academy of Sciences. It is somewhat comparable to the International Plant Names Index (IPNI), in which the Royal Botanic Gardens is also involved. A difference is that where IPNI does not indicate Correct name (botany), correct names, the ''Index Fungorum'' does indicate the status of a name. In the returns from the search page, a currently correct name is indicated in green, while others are in blue (a few, aberrant usages of names are indicated in red). All names are linked to pages giving the correct name, with lists of Synonym (taxonomy), synonyms. ''Index Fungorum'' is one of three nomenclatural repositories recognized b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porpidia Ochrolemma - Flickr - Pellaea
''Porpidia'' is a genus of crustose lichens in the family Lecideaceae. ''Porpidia'' species primarily inhabit siliceous rocks, pebbles, and stonework, with rare occurrences on bark, wood, and compacted soil. The thallus, or body of the lichen, varies in appearance from thick and crusty to barely visible. It may form a continuous layer or develop cracks resulting in a segmented, structure. The colour of the thallus ranges from grey and white to orange. Taxonomy ''Porpidia'' was circumscribed by the German lichenologist Gustav Wilhelm Körber in 1855, with '' Porpidia trullisata'' designated as the type species. Description Genus ''Porpidia'' consists of crustose lichens, meaning the thallus (the main body of the lichen) is closely attached to the surface it grows on. The thallus can vary in appearance, from thick and scaly to almost invisible, and may be solid or cracked into small pieces called . Its colour typically ranges from grey to white, though some species may show ora ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conidiomata
Conidiomata (singular: Conidioma) are blister-like fruiting structures produced by a specific type of fungus called a coelomycete. They are formed as a means of dispersing asexual spores call conidia, which they accomplish by creating the blister-like formations which then rupture to release the contained spores. Structure Conidiomata mainly consist of a mass of densely packed hypha which develops below the surface of the host cuticle, and the fungus may or may not use some of the host’s own tissue to construct the structure. Development of these structures can either occur just below the cuticle or below the epidermal layer of the tissue. Formation on the differing levels is dependent upon the type of conidiomata being formed. Five types of conidioma have been found and are classified as acervuli, pycnidia, sporodochia, synnemata and corenima. Types Acervuli Acervuli is one of the two major groups of conidiomata (the other being pycnidia). Conidiomata of this type for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ellipsoid
An ellipsoid is a surface that can be obtained from a sphere by deforming it by means of directional Scaling (geometry), scalings, or more generally, of an affine transformation. An ellipsoid is a quadric surface; that is, a Surface (mathematics), surface that may be defined as the zero set of a polynomial of degree two in three variables. Among quadric surfaces, an ellipsoid is characterized by either of the two following properties. Every planar Cross section (geometry), cross section is either an ellipse, or is empty, or is reduced to a single point (this explains the name, meaning "ellipse-like"). It is Bounded set, bounded, which means that it may be enclosed in a sufficiently large sphere. An ellipsoid has three pairwise perpendicular Rotational symmetry, axes of symmetry which intersect at a Central symmetry, center of symmetry, called the center of the ellipsoid. The line segments that are delimited on the axes of symmetry by the ellipsoid are called the ''principal ax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascus
An ascus (; : asci) is the sexual spore-bearing cell produced in ascomycete fungi. Each ascus usually contains eight ascospores (or octad), produced by meiosis followed, in most species, by a mitotic cell division. However, asci in some genera or species can occur in numbers of one (e.g. '' Monosporascus cannonballus''), two, four, or multiples of four. In a few cases, the ascospores can bud off conidia that may fill the asci (e.g. '' Tympanis'') with hundreds of conidia, or the ascospores may fragment, e.g. some '' Cordyceps'', also filling the asci with smaller cells. Ascospores are nonmotile, usually single celled, but not infrequently may be coenocytic (lacking a septum), and in some cases coenocytic in multiple planes. Mitotic divisions within the developing spores populate each resulting cell in septate ascospores with nuclei. The term ocular chamber, or oculus, refers to the epiplasm (the portion of cytoplasm not used in ascospore formation) that is surrounded by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hymenium
The hymenium is the tissue layer on the hymenophore of a fungal fruiting body where the cells develop into basidia or asci, which produce spores. In some species all of the cells of the hymenium develop into basidia or asci, while in others some cells develop into sterile cells called cystidia ( basidiomycetes) or paraphyses ( ascomycetes). Cystidia are often important for microscopic identification. The subhymenium consists of the supportive hyphae from which the cells of the hymenium grow, beneath which is the hymenophoral trama, the hyphae that make up the mass of the hymenophore. The position of the hymenium is traditionally the first characteristic used in the classification and identification of mushrooms. Below are some examples of the diverse types which exist among the macroscopic Basidiomycota and Ascomycota. * In agarics, the hymenium is on the vertical faces of the gills. * In boletes and polypores, it is in a spongy mass of downward-pointing tubes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
