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Cetraria Agnata
''Cetraria'' is a genus of fruticose lichens that associate with green algae as photobionts. Most species are found at high latitudes, occurring on sand or heath, and are characterised by their "strap-like" form with spiny edges. The lobes can range from narrow and linear to broader and flattened, often forming loose or densely packed cushions. Their distinctive spiny margins serve both a defensive role and aid in vegetative reproduction through fragmentation. The genus was created by Erik Acharius in 1803 and belongs to the large family Parmeliaceae. While originally a species-rich genus, taxonomic revisions since the 1960s have split many species into new genera, though the exact circumscription remains debated among lichenologists. Several ''Cetraria'' species have cultural and economic importance, particularly '' C. islandica'' (Iceland moss), which has been widely used in European traditional medicine for treating digestive and respiratory ailments. This species was a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cetraria Islandica
''Cetraria islandica'', also known as true Iceland lichen or Iceland moss, is an Arctic-alpine lichen whose erect or upright, leaflike habit gives it the appearance of a moss, where its name likely comes from. Description It is often of a pale chestnut color, but varies considerably, being sometimes almost entirely grayish-white; and grows to a height of from , the branches being channeled into flattened lobes with fringed edges. Chemistry In commerce it is a light-gray harsh cartilaginous body, almost colorless, and tastes slightly bitter. It contains about 70% of lichenin or lichen-starch, a polymeric carbohydrate compound isomeric with common starch. It also yields a peculiar modification of chlorophyll (called ''thallochlor''), fumaric acid, lichenostearic acid, and cetraric acid (which gives it the bitter taste). It also contains lichesterinic acid and protolichesterinic acids. Distribution and habitat It grows abundantly in the mountainous regions of northern cou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Famine Food
A famine food or poverty food is any inexpensive or ready available food used to nourish people in times of hunger and starvation, whether caused by extreme poverty, such as during economic depression or war, or by natural disasters such as drought. Foods associated with famine need not be nutritionally deficient, or unsavory. People who eat famine food in large quantity over a long period may become averse to it over time. In times of relative affluence, these foods may become the targets of social stigma and rejection. For example, some cultures that consider cats and dogs to be taboo foods may have historically consumed them during times of famine. The characterization of some foodstuffs as "famine" or "poverty" food can be social. For example, lobster and other crustaceans have been considered poverty food in some societies and luxury food in others, depending on the period and situation. Examples Several foodstuffs have been strongly associated with famine, war, or ti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cetraria Nivalis
''Cetraria'' is a genus of fruticose lichens that associate with green algae as photobionts. Most species are found at high latitudes, occurring on sand or heath, and are characterised by their "strap-like" form with spiny edges. The lobes can range from narrow and linear to broader and flattened, often forming loose or densely packed cushions. Their distinctive spiny margins serve both a defensive role and aid in vegetative reproduction through fragmentation. The genus was created by Erik Acharius in 1803 and belongs to the large family Parmeliaceae. While originally a species-rich genus, taxonomic revisions since the 1960s have split many species into new genera, though the exact circumscription remains debated among lichenologists. Several ''Cetraria'' species have cultural and economic importance, particularly '' C. islandica'' (Iceland moss), which has been widely used in European traditional medicine for treating digestive and respiratory ailments. This species was a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Species
In International_Code_of_Zoological_Nomenclature, zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological Type (biology), type wiktionary:en:specimen, specimen (or specimens). Article 67.1 A similar concept is used for suprageneric groups and called a type genus. In botanical nomenclature, these terms have no formal standing under the International Code of Nomenclature for algae, fungi, and plants, code of nomenclature, but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen (or, rarely, an illustration) which is also the type of a species name. The species name with that type can also be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, and some higher-rank names based on genus names, have suc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
