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Perispore

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Per´i`spore
n.1.(Bot.) The outer covering of a spore.
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Most dryopteroid ferns have broadly folded perispores, but the cristate spores of Megalastrum have sharp thin crests, and they are often parallel (see images at www.
Megalastrum (Dryopteridaceae) in Brazil, Paraguay, and Uruguay by Moran, Robbin C.; Prado, Jefferson; Labiak, Paulo H. / American Fern Journal
For the SEM study, spores were treated with hot 3% sodium carbonate for 2 minutes in order to preserve the perispore (Morbelli, 1980), and then they were washed, dehydrated, suspended in 96% ethanol, transferred to acetate plates and coated with gold.
Resurrection of the fern name Trachypteris gilliana (Baker) Svenson ... by Giacosa, J.P. Ramos; Giudice, G.E.; Morbelli, M.A. / American Fern Journal
The spores are monolete in both taxa, with rugulategranulate perispore and superficial spherules.
Revision of the genus Salpichlaena J. Sm. (Blechnaceae, Pteridophyta) by Giudice, Gabriela E.; Luna, Maria L.; Carrion, Cristian; De La Sota, Elias R. / American Fern Journal
 
 
 
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