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Cystopteris Intermedia
''Cystopteris'' is a genus of ferns in the family Cystopteridaceae. These are known generally as bladderferns or fragile ferns. They grow in temperate areas worldwide. This is a very diverse genus and within a species individuals can look quite different, especially in harsh environments where stress stunts their growth. They hybridize easily with each other and identifying an individual can be challenging. In general these are rhizome, rhizomatous perennials which grow in rocks or soil. Their leaves are multiply pinnate, in that each leaflet is divided into smaller parts. The sorus, sori are usually rounded and covered in an inflated bladder-like indusium. Species Species include: *''Cystopteris alpina'' *''Cystopteris bulbifera'' - bulblet fern *''Cystopteris chinensis'' (Ching) R.Wei & X.C.Zhang (syn. ''Cystoathyrium chinense'' Ching) *''Cystopteris diaphana'' *''Cystopteris dickieana'' - Dickie's bladderfern *''Cystopteris douglasii'' - Douglas' bladderfern *''Cystopteris fra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cystopteris Fragilis
''Cystopteris fragilis'' is a species of fern known by the common names brittle bladder-fern and common fragile fern. It can be found worldwide, generally in shady, moist areas. The leaves are up to 30 or 40 centimeters long and are borne on fleshy Petiole (botany), petioles with few or no long hairs. Each leaf is divided into many pairs of leaflets, each of which is subdivided into lobed segments. The underside of the leaf has many rounded sorus, sori containing the sporangium, sporangia. References External linksJepson Manual Treatment: ''Cystopteris fragilis'' [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cystopteris Protrusa
''Cystopteris protrusa'' is a common fern of North America, commonly known as the lowland bladderfern, lowland brittle fern or lowland fragile fern. The plant is native to eastern Canada, and the Midwestern and Eastern United States. Throughout much of its range it is the most common ''Cystopteris'' fern species. Description Unlike most species of the genus ''Cystopteris'', this fern is exclusively terrestrial, often forming large, dense colonies. It is also largely a spring ephemeral. Some fronds may remain by late summer, but most have disappeared. The specific name, protrusa, refers to the fact that the rhizome protrudes a short distance beyond the current year's fronds to form the following year's leaf buds. This protrusion is a positive diagnostic in the field. Sori are round and covered in a bladder-like indusium. Taxonomy ''Cystopteris protrusa'' was originally considered only a variety of ''Cystopteris fragilis''. However, it is now known that this is a diploid s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cystopteris
''Cystopteris'' is a genus of ferns in the family Cystopteridaceae. These are known generally as bladderferns or fragile ferns. They grow in temperate areas worldwide. This is a very diverse genus and within a species individuals can look quite different, especially in harsh environments where stress stunts their growth. They hybridize easily with each other and identifying an individual can be challenging. In general these are rhizomatous perennials which grow in rocks or soil. Their leaves are multiply pinnate, in that each leaflet is divided into smaller parts. The sori are usually rounded and covered in an inflated bladder-like indusium. Species Species include: *''Cystopteris alpina'' *''Cystopteris bulbifera'' - bulblet fern *'' Cystopteris chinensis'' (Ching) R.Wei & X.C.Zhang (syn. ''Cystoathyrium chinense'' Ching) *'' Cystopteris diaphana'' *'' Cystopteris dickieana'' - Dickie's bladderfern *'' Cystopteris douglasii'' - Douglas' bladderfern *''Cystopteris fragilis'' - ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington, DC
) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, National Cathedral , image_flag = Flag of the District of Columbia.svg , image_seal = Seal of the District of Columbia.svg , nickname = D.C., The District , image_map = , map_caption = Interactive map of Washington, D.C. , coordinates = , subdivision_type = Country , subdivision_name = , established_title = Residence Act , established_date = 1790 , named_for = George Washington, Christopher Columbus , established_title1 = Organized , established_date1 = 1801 , established_title2 = Consolidated , established_date2 = 1871 , established_title3 = Home Rule Ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smithsonian Institution
The Smithsonian Institution ( ), or simply the Smithsonian, is a group of museums and education and research centers, the largest such complex in the world, created by the U.S. government "for the increase and diffusion of knowledge". Founded on August 10, 1846, it operates as a trust instrumentality and is not formally a part of any of the three branches of the federal government. The institution is named after its founding donor, British scientist James Smithson. It was originally organized as the United States National Museum, but that name ceased to exist administratively in 1967. Called "the nation's attic" for its eclectic holdings of 154 million items, the institution's 19 museums, 21 libraries, nine research centers, and zoo include historical and architectural landmarks, mostly located in the District of Columbia. Additional facilities are located in Maryland, New York, and Virginia. More than 200 institutions and museums in 45 states,States without Smithsonian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David B
David Robert Jones (8 January 194710 January 2016), known professionally as David Bowie ( ), was an English singer-songwriter and actor. A leading figure in the music industry, he is regarded as one of the most influential musicians of the 20th century. Bowie was acclaimed by critics and musicians, particularly for his innovative work during the 1970s. His career was marked by reinvention and visual presentation, and his music and stagecraft had a significant impact on popular music. Bowie developed an interest in music from an early age. He studied art, music and design before embarking on a professional career as a musician in 1963. "Space Oddity", released in 1969, was his first top-five entry on the UK Singles Chart. After a period of experimentation, he re-emerged in 1972 during the glam rock era with his flamboyant and androgynous alter ego Ziggy Stardust (character), Ziggy Stardust. The character was spearheaded by the success of Bowie's single "Starman (song), Starma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytotaxa
''Phytotaxa'' is a peer-reviewed scientific journal for rapid publication on any aspect of systematic botany. It publishes on a wide range of subjects, but focuses on new species, monographs, floras, revisions, reviews, and typification issues. ''Phytotaxa'' covers all plant groups covered by the International Code of Nomenclature for algae, fungi, and plants, including diatoms, fungi, algae, lichens, mosses, hornworts, liverworts, and vascular plants), both living and fossil. The journal was established in 2009 by Maarten Christenhusz and the first issue appeared in October 2009. Authors have the option to publish open access. Abstracting and indexing The journal is abstracted and indexed in Science Citation Index Expanded, Current Contents/Agriculture, Biology & Environmental Sciences, and BIOSIS Previews. See also * Zootaxa ''Zootaxa'' is a peer-reviewed scientific mega journal for animal taxonomists. It is published by Magnolia Press (Auckland, New Zealand). The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid (biology)
In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction. Hybrids are not always intermediates between their parents (such as in blending inheritance), but can show hybrid vigor, sometimes growing larger or taller than either parent. The concept of a hybrid is interpreted differently in animal and plant breeding, where there is interest in the individual parentage. In genetics, attention is focused on the numbers of chromosomes. In taxonomy, a key question is how closely related the parent species are. Species are reproductively isolated by strong barriers to hybridisation, which include genetic and morphological differences, differing times of fertility, mating behaviors and cues, and physiological rejection of sperm cells or the developing embryo. Some act before fertilization and others after it. Similar barriers exist in plants, with differences in flowering tim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diploid
Ploidy () is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes. Sets of chromosomes refer to the number of maternal and paternal chromosome copies, respectively, in each homologous chromosome pair, which chromosomes naturally exist as. Somatic cells, tissues, and individual organisms can be described according to the number of sets of chromosomes present (the "ploidy level"): monoploid (1 set), diploid (2 sets), triploid (3 sets), tetraploid (4 sets), pentaploid (5 sets), hexaploid (6 sets), heptaploid or septaploid (7 sets), etc. The generic term polyploid is often used to describe cells with three or more chromosome sets. Virtually all sexually reproducing organisms are made up of somatic cells that are diploid or greater, but ploidy level may vary widely between different organisms, between different tissues within the same organism, and at different stages in an organism's life cycle. Half ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cystopteris Utahensis
''Cystopteris'' is a genus of ferns in the family Cystopteridaceae. These are known generally as bladderferns or fragile ferns. They grow in temperate areas worldwide. This is a very diverse genus and within a species individuals can look quite different, especially in harsh environments where stress stunts their growth. They hybridize easily with each other and identifying an individual can be challenging. In general these are rhizomatous perennials which grow in rocks or soil. Their leaves are multiply pinnate, in that each leaflet is divided into smaller parts. The sori are usually rounded and covered in an inflated bladder-like indusium. Species Species include: *''Cystopteris alpina'' *''Cystopteris bulbifera'' - bulblet fern *'' Cystopteris chinensis'' (Ching) R.Wei & X.C.Zhang (syn. ''Cystoathyrium chinense'' Ching) *'' Cystopteris diaphana'' *'' Cystopteris dickieana'' - Dickie's bladderfern *'' Cystopteris douglasii'' - Douglas' bladderfern *''Cystopteris fragilis'' - ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cystopteris Tenuis
''Cystopteris tenuis'' is sometimes known as Mackay's bladder fern or Mackay's fragile fern. It was long considered to be a part of the superspecies for fragile ferns, as ''Cystopteris fragilis'' ( L.) Bernh. var. ''mackayi'' Lawson. left, ''C. tenuis'' in native habitat This species is an allotetraploid of hybrid origin (see Cystopteris hybrid complex). The parent diploid species are ''Cystopteris protrusa'' and the hypothesized ''Cystopteris hemifragilis'', believed to be an extinct species. ''C. tenuis'' is known to hybridize with '' C. bulbifera'' to produce the hybrid ''C. Xillinoensis'', with '' C. tennesseensis'' top produce the hybrid ''C. Xwagneri'', and with '' C. fragilis'' and '' C. protrusa'' to produce unnamed hybrids (as per Flora of North America). Mackay's fragile fern grows on rock or in scree, generally in sheltered spots, in the northeastern United States. It may be distinguished from the somewhat similar ''Cystopteris tennesseensis ''Cystopteris'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cystopteris Tennesseensis
''Cystopteris'' is a genus of ferns in the family Cystopteridaceae. These are known generally as bladderferns or fragile ferns. They grow in temperate areas worldwide. This is a very diverse genus and within a species individuals can look quite different, especially in harsh environments where stress stunts their growth. They hybridize easily with each other and identifying an individual can be challenging. In general these are rhizomatous perennials which grow in rocks or soil. Their leaves are multiply pinnate, in that each leaflet is divided into smaller parts. The sori are usually rounded and covered in an inflated bladder-like indusium. Species Species include: *''Cystopteris alpina'' *''Cystopteris bulbifera'' - bulblet fern *'' Cystopteris chinensis'' (Ching) R.Wei & X.C.Zhang (syn. ''Cystoathyrium chinense'' Ching) *'' Cystopteris diaphana'' *'' Cystopteris dickieana'' - Dickie's bladderfern *'' Cystopteris douglasii'' - Douglas' bladderfern *''Cystopteris fragilis'' - ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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