ophioglossum वाक्य
उदाहरण वाक्य
मोबाइल
- The genus " Ophioglossum " has the highest chromosome counts of any known plant.
- It is closely related to, and sometimes treated as a subgenus of, the genus " Ophioglossum ".
- It is a fern in the Ophioglossaceae family, and many people still classify it as an " Ophioglossum ".
- The record holder is " Ophioglossum reticulatum ", with about 630 pairs of chromosomes ( 1260 chromosomes per cell ).
- This species is thought to be derived from a hybrid between " Ophioglossum vulgatum " and " Ophioglossum lusitanicum ".
- This species is thought to be derived from a hybrid between " Ophioglossum vulgatum " and " Ophioglossum lusitanicum ".
- Members of Ophioglossaceae are usually terrestrial ( excepting a few epiphytic species of " Ophioglossum " ) and occur in both temperate and tropical areas.
- It is the only site in Great Britain and Ireland for the small fern, least adder s tongue ( " Ophioglossum lusitanicum " ).
- She published " A Revision of the North American Species of " Ophioglossum ", " the adder's-tongue ferns, in 1897.
- The high record would be somewhere amongst the ferns, with the adder's tongue fern " Ophioglossum " ahead with an average of 1262 chromosomes.
- Adder's tongue ( " Ophioglossum reticulatum ), " a member of this family ", " is notable for having as many as 1260 chromosomes.
- "Ophioglossum lusitanicum " subsp . " coriaceum " has a much broader ecological range in southern Australia, where habitats include damp open sites; from coast meadows to alpine grassland ..
- The extreme in polyploidy occurs in the fern genus " Ophioglossum ", the adder's-tongues, in which polyploidy results in chromosome counts in the hundreds, or, in at least one case, well over one thousand.
- Interestingly, three ferns were found for the first time in the A�r recently, " Cheilanthes coriacea ", " Actiniopteris radiata ", and " Ophioglossum polyphyllum ", suggesting that ferns may be more prone to develop in arid environments than commonly proposed.
- The meadows are rich in grassland species : the nationally rare northern hawk's beard, " Crepis mollis ", is plentiful, and the locally rare adder's tongue, " Ophioglossum vulgatum ", and frog orchid, " Coeloglossum viride ", are also present.
- It was once widely distributed in the wetlands and paddy fields of Kerala, but becoming rare due to changes in the habitats . " Ophioglossum " species such as " O . costatum, O . nudicale " and " O . gramineum " are also distributed sparsely and make their appearance during the wet phase.
- The grasslands at Tuthill Quarry are typical of the type, being characterised by the presence of blue moor-grass, " Sesleria albicans ", and small scabious, " Scabiosa columbaria ", but a number of less common species are also present, including common butterwort, " Pinguicula vulgaris ", and adder's-tongue fern, " Ophioglossum vulgatum ".
- Because Miss Hauxwell employed traditional farming practices, with no re-seeding and no artificial fertilisers, the meadows are thought to be the least improved in upland Durham, and, as a result, have a very rich floral composition, including rare species such as frog orchid, " Coeloglossum viride ", moonwort, " Botrychium lunaria ", and adder's-tongue, " Ophioglossum vulgatum ".
- The distribution in Britain is restricted to one small area of coastal heath on Wingletang Down where some of the colonies are suffering from an increase of competitive grasses, gorse ( " Ulex europaeus " ) and bramble ( " Rubus fruticosus " ) . " Ophioglossum lusitanicum " is listed on Schedule 8 of the Wildlife and Countryside Act 1981, and is within a Site of Special Scientific Interest ( SSSI ).
- The rich assemblage of grassland species includes a number of rare and local species, bird's-eye primrose, " Primula farinosa ", adder's-tongue fern, " Ophioglossum vulgatum ", lesser club-moss, " Selaginella selaginoides ", and grass of Parnassus, " Parnassia palustris ", as well as an inland colony of sea plantain, " Plantago maritima ".
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