Adder's tongue ( " Ophioglossum reticulatum ), " a member of this family ", " is notable for having as many as 1260 chromosomes.
12.
"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 ..
13.
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.
14.
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.
15.
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.
16.
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.
17.
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 ".
18.
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 ".
19.
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 ).
20.
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 ".
