Helminthostachys
Helminthostachys (family Ophioglossaceae) A genus of ferns of 1 species, with a creeping rhizome, the sterile leaf-blade ternately compound, and a dense, fertile spike. It is confined to the Indo-Malaysian region and Australasia, and is probably of very ancient origin.
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Indifferent Species , indifferent species A species with no real affinity for any particular community, but which is not rare (as an accidental species would be). It is fi… preferential species , preferential species In phytosociology, a species that is present with varying abundance in several communities, but is especially abundant and vigor… Allopatry , allopatry The occurrence of species or other taxa in different geographical regions. Subspecies are allopatric by definition. Compare SYMPATRY.
allop… Centrifugal Speciation , centrifugal speciation The principle that new species are likely to arise towards the centre of the range of the present species, rather than at the… Constant Species , constant species(constancy) In phytosociology, a species common to a particular association or community, but not necessarily confined to that commun… Mints (plants) , The mint family (Labiatae or Lamiaceae) is a large group of dicotyledonous plants occurring worldwide in all types of climates except in extreme arct…
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Helminthostachys