Pollen and Spore Atlas

Thelypteris interrupta THELYPTERIDACEAE

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Pollen / Spore Morphologic Type(s) Surface Pattern(s) Equatorial Size Polar Size
min max mean min max mean
spore monolete 40.0 27.0

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Aperture Count(s) 1
Morphology Notes Spores monolete. Symmetry bilateral,heteropolar; plano-convex to concavo-convex in equatorial longitudinal view; perine rugulate-saccate. Projections varying from short linear to round, minutely scabrate. Equatorial axis 40um average, polar axis 27um average.

Ecology and Geography

Plant Type Floristic Region(s)
fern East Pacific Islands,
Other outside Australasia

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Common Name willdenow's maiden fern
Habitat Notes Pantropical. Found in the Caribbean. A variant called Dryopteris gongyloides var. glabra (Mett) found in the Congo of Central Africa. This fern noted by Skottsberg at Rano Aroi 400m at the edge of the swamp with Polygonum very rare. In Rano Kao at the bottom of the crater 110m in the Scirpetum and among the large boulders at little higher up. Fertile. Found in marshes and swamps, wet areas.
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Publication Information Thelypteridaceae have historically been associated with Dryopteridaceae (Dryopteris) but in fact have no close relationship with that family. Thelypteris and allies differ by their indument of transparent needlelike hairs (versus needlelike hairs absent in Dryopteridaceae (Alan R. Smith "Thelypteridaceae" in Flora of North America Vol. 2 Oxford University Press).
Collection Notes Gossen(2010) identified fern in Rano Kao at lake edge and under Acacia forest growing in rocks.