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Bryum Pseudotriquetrum
''Ptychostomum pseudotriquetrum'', commonly known as marsh bryum, is a species of moss belonging to the family Bryaceae. It has cosmopolitan distribution. There are two subspecies, Bryum pseudotriquetrum var. pseudotriquetrum and Bryum pseudotriquetrum var. bimum. The moss has an acrocarpous growth form. The shoots form green to reddish or brown tufts and patches that can grow to be several centimetres tall. The stems are often reddish. The green to yellowish-green leaves are equally spaced along the stem, are 2–5 mm long, have a border of narrow reddish cells, and have a thick nerve that is usually shortly excurrent. Leaves are oblong-lanceolate to ovate-lanceolate. The leaves are contorted when dry and erect-spreading when wet. Most plants have leaves with a base that runs down onto the stem, although this feature is not always well-developed. The lower parts the stems are covered with a brownish red mat of rhizoids. The pendulous or inclined capsules are frequent, 2.5-4 m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NBN Atlas
NBN or nbn may refer to: Broadcasting networks * National Black Network, US radio network * National Broadcasting Network (Lebanon) * National Broadcasting Network (Trinidad and Tobago) * Nagoya Broadcasting Network, Japan * Nanjing Broadcasting Network, China * NBN Television, New South Wales, Australia * People's Television Network, Philippines, formerly National Broadcasting Network Organizations * Bureau of Normalization, Belgium * National Biodiversity Network, UK *NBN Co, aka nbn, Australian Government corporation responsible for National Broadband Network * Nefesh B'Nefesh, Israeli organization encouraging immigration Publications * ''North by Northwestern'', magazine of Northwestern University, US Other * Annobón Airport, Equatorial Guinea (IATA code) * ''National Bingo Night (other)'', a game show in several countries * National Bibliography Number, several publication identifier systems * National Broadband Network, Australian national wholesale open-access ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Encyclopedia Of Life
The ''Encyclopedia of Life'' (''EOL'') is a free, online encyclopedia intended to document all of the 1.9 million living species known to science. It is compiled from existing trusted databases curated by experts and with the assistance of non-experts throughout the world. It aims to build one "infinitely expandable" page for each species, including video, sound, images, graphics, as well as text. In addition, the Encyclopedia incorporates content from the Biodiversity Heritage Library, which digitizes millions of pages of printed literature from the world's major natural history libraries. The project was initially backed by a US$50 million funding commitment, led by the MacArthur Foundation and the Sloan Foundation, who provided US$20 million and US$5 million, respectively. The additional US$25 million came from five cornerstone institutions—the Field Museum, Harvard University, the Marine Biological Laboratory, the Missouri Botanical Garden, and the Smithsonian Institutio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moss
Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) '' sensu stricto''. Bryophyta (''sensu lato'', Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and hornworts. Mosses typically form dense green clumps or mats, often in damp or shady locations. The individual plants are usually composed of simple leaves that are generally only one cell thick, attached to a stem that may be branched or unbranched and has only a limited role in conducting water and nutrients. Although some species have conducting tissues, these are generally poorly developed and structurally different from similar tissue found in vascular plants. Mosses do not have seeds and after fertilisation develop sporophytes with unbranched stalks topped with single capsules containing spores. They are typically tall, though some species are much larger. ''Dawsonia'', the tallest moss in the world, can grow to in height. There are a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bryaceae
Bryaceae is a family of mosses. Genera Genera include:Buck, William R. & Bernard Goffinet. 2000. "Morphology and classification of mosses", pages 71-123 ''in'' A. Jonathan Shaw & Bernard Goffinet (Eds.), ''Bryophyte Biology''. (Cambridge: Cambridge University Press). . *'' Acidodontium'' *''Anomobryum'' (e.g. ''Anomobryum julaceum'') *'' Brachymenium'' *''Bryum'' *'' Imbribryum'' *'' Leptostomopsis'' (formerly part of ''Bryum'') *'' Mniobryoides'' *'' Ochiobryum'' *'' Osculatia'' *'' Perssonia'' *'' Plagiobryoides *''Plagiobryum'' *'' Ptychostomum'' (formerly part of ''Bryum'') *''Rhodobryum'' (e.g. ''Rhodobryum roseum ''Rhodobryum roseum'', commonly known as rose moss, is a species of moss of the subclass Bryidae and family Bryaceae, found throughout most of the world in woods or sheltered grassy places. It rarely forms sporophytes and spore cases, and primari ...'') *'' Roellobryon'' (formerly known as ''Roellia'') *'' Rosulabryum'' References Moss f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmopolitan Distribution
In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The extreme opposite of a cosmopolitan species is an endemic one, being found only in a single geographical location. Qualification The caveat “in appropriate habitat” is used to qualify the term "cosmopolitan distribution", excluding in most instances polar regions, extreme altitudes, oceans, deserts, or small, isolated islands. For example, the housefly is highly cosmopolitan, yet is neither oceanic nor polar in its distribution. Related terms and concepts The term pandemism also is in use, but not all authors are consistent in the sense in which they use the term; some speak of pandemism mainly in referring to diseases and pandemics, and some as a term intermediate between endemism and cosmopolitanism, in effect regarding pandemism as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Bryological Society
The British Bryological Society is an academic society dedicated to bryology, which encourages the study of bryophytes (mosses, liverworts and hornworts). It publishes the peer-reviewed ''Journal of Bryology''. History The Society developed from the Moss Exchange Club founded in 1896 by Coslett Herbert Waddell who was Secretary of the club until 1903. It was therefore the first bryological society in the world. Its aim was to provide communication between those interested in bryophytes so they could build up collections of correctly identified specimens. The Club produced printed reports and compiled records of bryophyte distributions by vice-county, and members exchanged information by letter, but the Club did not hold meetings. Over the years, several updated lists of the moss flora were produced. Members focused on the British Isles, although several were interested in bryophytes of other countries. A proposal for a formal 'Foreign Section' in 1901 was unsuccessful. In 1903 Wil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acrocarpous
The Bryopsida constitute the largest class of mosses, containing 95% of all moss species. It consists of approximately 11,500 species, common throughout the whole world. The group is distinguished by having spore capsules with teeth that are ''arthrodontous''; the teeth are separate from each other and jointed at the base where they attach to the opening of the capsule.Buck, William R. & Bernard Goffinet. (2000) "Morphology and classification of mosses", pages 71-123 ''in'' A. Jonathan Shaw & Bernard Goffinet (Eds.), ''Bryophyte Biology''. (Cambridge: Cambridge University Press). Consequently, mosses in the Class Bryopsida are commonly known as the “joint-toothed” or “arthrodontous” mosses. These teeth are exposed when the covering operculum falls off. In other groups of mosses, the capsule is either ''nematodontous'' with an attached operculum, or else splits open without operculum or teeth. Morphological groups The Bryopsida can be simplified into three groups: the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizoids
Rhizoids are protuberances that extend from the lower epidermal cells of bryophytes and algae. They are similar in structure and function to the root hairs of vascular land plants. Similar structures are formed by some fungi. Rhizoids may be unicellular or multicellular. Evolutionary development Plants originated in aquatic environments and gradually migrated to land during their long course of evolution. In water or near it, plants could absorb water from their surroundings, with no need for any special absorbing organ or tissue. Additionally, in the primitive states of plant development, tissue differentiation and division of labor was minimal, thus specialized water absorbing tissue was not required. The development of specialized tissues to absorb water efficiently and anchor themselves to the ground enabled the spread of plants to the land. Description Rhizoids absorb water mainly by capillary action, in which water moves up between threads of rhizoids and not through ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capsule (fruit)
In botany a capsule is a type of simple, dry, though rarely fleshy dehiscent fruit produced by many species of angiosperms (flowering plants). Origins and structure The capsule (Latin: ''capsula'', small box) is derived from a compound (multicarpeled) ovary. A capsule is a structure composed of two or more carpels. In (flowering plants), the term locule (or cell) is used to refer to a chamber within the fruit. Depending on the number of locules in the ovary, fruit can be classified as uni-locular (unilocular), bi-locular, tri-locular or multi-locular. The number of locules present in a gynoecium may be equal to or less than the number of carpels. The locules contain the ovules or seeds and are separated by septa. Dehiscence In most cases the capsule is dehiscent, i.e. at maturity, it splits apart (dehisces) to release the seeds within. A few capsules are indehiscent, for example those of ''Adansonia digitata'', ''Alphitonia'', and '' Merciera''. Capsules are often classif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seta
In biology, setae (singular seta ; from the Latin word for "bristle") are any of a number of different bristle- or hair-like structures on living organisms. Animal setae Protostomes Annelid setae are stiff bristles present on the body. They help, for example, earthworms to attach to the surface and prevent backsliding during peristaltic motion. These hairs make it difficult to pull a worm straight from the ground. Setae in oligochaetes (a group including earthworms) are largely composed of chitin. They are classified according to the limb to which they are attached; for instance, notosetae are attached to notopodia; neurosetae to neuropodia. Crustaceans have mechano- and chemosensory setae. Setae are especially present on the mouthparts of crustaceans and can also be found on grooming limbs. In some cases, setae are modified into scale like structures. Setae on the legs of krill and other small crustaceans help them to gather phytoplankton. It captures them and allows th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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