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Pellaea glabella

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Kingdom  Plantae
Class  Polypodiopsida
Family  Pteridaceae
Scientific name  Pellaea glabella
Division  Pteridophyta
Order  Polypodiales
Genus  Pellaea
Rank  Species
Pellaea glabella Pellaea glabella slender cliffbrake Go Botany
Similar  Pellaea atropurpurea, Cliffbrake, Pellaea breweri, Cystopteris tenuis, Ophioglossum pusillum

Pellaea glabella is the smooth cliffbrake. For much of pteridological history, it was regarded as a reduced form or variety of Pellaea atropurpurea. P. glabella is known to exist in two cryptic species, one diploid and one tetraploid. The diploid reproduces sexually, while the tetraploid is normally apogamous. It is now known that the tetraploid form of the species is one of the parents of the original hybrid P. Xatropurpurea that became the apogamous species.

Pellaea glabella Pellaea glabella slender cliffbrake Go Botany


P. glabella is epipetric, normally growing on well-weathered limestone. It favors more exposed sites than P. atropurpurea.

This species is distinguished by its sessile or nearly sessile pinnae and smooth, not hairy, stipes.


P. glabella has been assigned a total of four subspecies:

  • Pellaea glabella subsp. glabella Mettenius ex Kuhn
  • Pellaea glabella subsp. missouriensis (G. J. Gastony) Windham
  • Pellaea glabella subsp. occidentalis (E. E. Nelson) Windham
  • Pellaea glabella subsp. simplex (Butters) A. Löve & D. Löve

  • Pellaea glabella Pellaea glabella Smooth Cliff Brake Minnesota Wildflowers

    The subspecies glabella and simplex are the tetraploids, while missouriensis and occidentalis are the diploids. Glabella and missouriensis have hairlike scales near the midrib, while simplex and occidentalis are completely glabrous.

    Pellaea glabella Pellaea glabella Pteridaceae image 945 at PhytoImagessiuedu
    Pellaea glabella httpsplantsusdagovgallerystandardpegl001
    Pellaea glabella Pellaea glabella

    References

    Pellaea glabella Wikipedia


    Similar Topics
    Cystopteris tenuis
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