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Polypodiales are unique in bearing sporangia with a vertical annulus interrupted by the stalk and stomium. [2] These sporangial characters were used by Johann Jakob Bernhardi to define a group of ferns he called the "Cathetogyratae"; [3] the Pteridophyte Phylogeny Group has suggested reviving this name as the informal term cathetogyrates, to replace the ambiguously circumscribed term "polypods ...
The Hymenophyllaceae, the filmy ferns and bristle ferns, are a family of two to nine genera (depending on classification system) and about 650 known species [1] of ferns, with a subcosmopolitan distribution, but generally restricted to very damp places or to locations where they are wetted by spray from waterfalls or springs.
The ferns (Polypodiopsida or Polypodiophyta) are a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers.They differ from mosses by being vascular, i.e., having specialized tissues that conduct water and nutrients, and in having life cycles in which the branched sporophyte is the dominant phase.
They are known colloquially as the wood ferns. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the family is placed in the suborder Polypodiineae . [ 1 ] Alternatively, it may be treated as the subfamily Dryopteridoideae of a very broadly defined family Polypodiaceae sensu lato .
Osmundaceae (royal fern family) is a family of ferns containing four to six extant genera and 18–25 known species. It is the only living family of the order Osmundales in the class Polypodiopsida or in some classifications the only order in the class Osmundopsida.
The young fronds are stir-fried and used in salads. [6] [7]They may have mild amounts of fern toxins but no major toxic effects are recorded. [8]It is known as pakô ("wing") in the Philippines, [6] pucuk paku and paku tanjung in Malaysia, sayur paku or pakis in Indonesia, phak koot (Thai: ผักกูด) in Thailand, rau dớn in Vietnam, dhekia (Assamese: ঢেকীয়া) in Assam ...
At least one study has shown association between P. polypodioides and moss, [8] indicating that this fern may rely on moss for some of its water needs. Resurrection ferns rehydrated in their uncurled state. Resurrection ferns accumulate sugar in dehydrated cells in order to protect them and stabilize the membranes and proteins in the dry state.
The fern grows well in well-drained soil under medium levels of light. It needs to be protected from slugs and snails. [8] Campyloneurum phyllitidis was grown in England during the Victorian era, when ferns were particularly popular (the phenomenon known as pteridomania). The fern was described by an author of the time, Shirley Hibberd, as ...
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