Flora of the Southeastern United States
2022 Edition


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Sitobolium Desvaux. Subfamily: Dennstaedtioideae. Hay-scented Fern.

A genus of 10 or more species, of e. Asia and e. North America. Phylogenetic studies show that Dennstaedtia as traditionally interpreted is polyphyletic; our temperate, eastern North American species is related to Asian, temperate species, and should be placed in Sitobolium.

ID notes: Sitobolium punctilobulum can be distinguished from other woodland ferns with deciduous fronds of generally similar size and shape (such as Athyrium, Dryopteris, and Parathelypteris) by the following characteristics: leaves yellow-green or pale-green in color, with whitish-gray glandular trichomes, petioles silvery-pilose and lacking any scales, leaves borne scattered (as clonal patches) from long-creeping rhizomes, sori tiny (< 0.5 mm in diameter), with a whitish cup-like indusium, and borne near the margin of the leaf segments.

Ref: Schwartsburd et al. (2020). Show full citations.

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image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷