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Pityrogramma
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A botanical diagram shows different types of sori and sporangia arrangements in various fern species, including labeled cross-sections and surface views for genera such as Pityrogramma, Pteris, Polypodium, Acrostichum, Asplenium, and Dryopteris.
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Pityrogramma

fern genus
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A botanical diagram shows different types of sori and sporangia arrangements in various fern species, including labeled cross-sections and surface views for genera such as Pityrogramma, Pteris, Polypodium, Acrostichum, Asplenium, and Dryopteris.
sori Examples of sori and arrangements of sporangia in various species of ferns.

Pityrogramma is a genus of terrestrial tropical ferns belonging to the family Pteridaceae. These ferns are commonly known as gold- and silver-backed ferns due to the powdery, yellowish or white undersurface of their fronds. The genus comprises about 16 species, some of which are cultivated in greenhouses for their colorful undersides. Ferns, in general, are most abundant in tropical regions and often grow in shaded, damp forests, though some species are adapted to rocky or dry habitats.1234

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4 Britannica Sources
  1. Pityrogramma
  2. Pteridaceae
  3. fern - Distribution and abundance
  4. fern - Ecology

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