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Pteridaceae

 
Pteridaceae

 
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Pteridaceae
 
 
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Pteridaceae is a large family of fern
Fern

A fern is any one of a group of about 20,000 species of plants classified in the phylum or division Pteridophyta, also known as Filicophyta....
s in the order Pteridales
Pteridales

The Pteridales are ferns that have their sorus in linear strips under the edge of the leaf tissue, usually with the edge of the lamina reflexed over....
. Members of the family have creeping or erect rhizome
Rhizome

In botany, a rhizome is a characteristically horizontal plant stem of a plant that is usually found underground, often sending out roots and shoots from its nodes....
s and are mostly terrestrial or epipetric (growing on rock). The leaves
Leaf

In botany, a leaf is an above-ground plant Organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin, to expose the cells containing chloroplast to light over a broad area, and to allow light to penetrate fully into the tissues....
 are almost always compound and have linear sori
Sorus

A sorus is a cluster of sporangium.In fungi and lichens, the sorus is surrounded by an external layer. In some red algae it may take the form of a depression into the thallus....
 that are typically on the margins of the leaves
Leaf

In botany, a leaf is an above-ground plant Organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin, to expose the cells containing chloroplast to light over a broad area, and to allow light to penetrate fully into the tissues....
 and lack a true indusium, typically being protected by a false indusium formed from the reflexed margin of the leaf. The family includes four groups of genera that are sometimes recognized as separate families: the adiantoid, cheilanthoid, pteroid, and hemionitidoid ferns.






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Pteridaceae is a large family of fern
Fern

A fern is any one of a group of about 20,000 species of plants classified in the phylum or division Pteridophyta, also known as Filicophyta....
s in the order Pteridales
Pteridales

The Pteridales are ferns that have their sorus in linear strips under the edge of the leaf tissue, usually with the edge of the lamina reflexed over....
. Members of the family have creeping or erect rhizome
Rhizome

In botany, a rhizome is a characteristically horizontal plant stem of a plant that is usually found underground, often sending out roots and shoots from its nodes....
s and are mostly terrestrial or epipetric (growing on rock). The leaves
Leaf

In botany, a leaf is an above-ground plant Organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin, to expose the cells containing chloroplast to light over a broad area, and to allow light to penetrate fully into the tissues....
 are almost always compound and have linear sori
Sorus

A sorus is a cluster of sporangium.In fungi and lichens, the sorus is surrounded by an external layer. In some red algae it may take the form of a depression into the thallus....
 that are typically on the margins of the leaves
Leaf

In botany, a leaf is an above-ground plant Organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin, to expose the cells containing chloroplast to light over a broad area, and to allow light to penetrate fully into the tissues....
 and lack a true indusium, typically being protected by a false indusium formed from the reflexed margin of the leaf. The family includes four groups of genera that are sometimes recognized as separate families: the adiantoid, cheilanthoid, pteroid, and hemionitidoid ferns. Relationships among these groups remain unclear, and although some recent genetic analyses of the Pteridales suggest that neither the family Pteridaceae nor the major groups within it are all monophyletic, as yet these analyses are insufficiently comprehensive and robust to provide good support for a revision of the order at the family level. As traditionally defined, the groups within Pteridaceae are as follows:

  • Adiantoid ferns; epipetric, terrestrial or epiphytic in moist habitats, rachis often dichotomously branching; sori relatively small and discrete with sproangia
    Sporangium

    A sporangium is a plant or fungus structure producing and containing spores. Sporangia occur in Flowering plant, gymnosperms, ferns, fern allies, bryophytes, Algaee, and Fungus....
     born on the false indusium rather than the leaf blade proper; only one genus:
    • Adiantum, the maidenhair ferns
  • Cheilanthoid ferns; primarily epipetric in semiarid habitats; leaves mostly with well-developed scales or trichomes, often bipinnate or otherwise highly compound; sporangia mostly born in marginal sori with false indusia that are +/- continuous around the leaf margins; several genera, including:
    • Argyrochosma
      Argyrochosma

      Argyrochosma is a genus of ferns known commonly as false cloak ferns. Species now in this genus were previously treated as members of related genera Notholaena or Pellaea but were segregated into their own genus in 1987....
    • Aspidotis
      Aspidotis

      Aspidotis is a small genus of ferns known commonly as laceferns. These are small tufting ferns native to western North America. They have shiny leaves with neat, pointed segments....
      , the lace ferns
    • Astrolepis
      Astrolepis

      Astrolepis is a small genus of ferns known commonly as star-scaled cloak ferns. They were segregated into this new genus in 1992, having previously been members of the genera Cheilanthes and Notholaena....
    • Cheilanthes, the lip ferns
    • Notholaena
      Notholaena

      Notholaena is a genus of ferns in the family Pteridaceae found exclusively in the New World. Ferns of this genus are mostly epipetric or occurring in coarse, gravelly soils, and are most abundant and diverse in the mountain ranges of warm arid or semiarid regions....
      , the cloak ferns
    • Pellaea
      Pellaea

      Members of the genus Pellaea, sometimes called cliff brakes, are ferns primarily of rocky habitats, including moist rocky canyons, slopes, and bluffs....
      , the cliff brakes
  • Pteroid ferns; terrestrial and epipetric in moist habitats; leaves mostly without prominent scales or trichomes, most often pinnate
    Pinnate

    Pinnate is a term used to describe feather-like or multi-divided features arising from both sides of a common axis in plant or animal structures, and comes from the Latin word pinna for "feather"....
     but sometimes more compound; sporangia born in marginal sori with false indusia that are +/- continuous around the leaf margins; several genera, including:
    • Pteris, the brakes
    • Onychium
    • Acrostichum
  • Hemionitidoid ferns; terrestrial, epipetric or epiphytic in moist or semiarid habitats; leaves simple, pinnate, or more compound; sporangia born in linear non-marginal, exindusiate sori or sometimes in marginal sori; several genera, including:
    • Anogramma
      Anogramma

      Anogramma is a genus of fern in family Pteridaceae. It contains the following species :* Anogramma ascensionis, Diels* Anogramma leptophylla, Link...
    • Cryptogramma
      Cryptogramma

      Cryptogramma is a genus of ferns known commonly as rockbrakes or parsley ferns. They can be found in temperate regions on several continents worldwide....
    • Eriosorus
      Eriosorus

      Eriosorus is a genus of ferns found in the cooler regions of Central America and South America....
    • Hemionitis
    • Jamesonia
    • Pityrogramma

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