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Homalosorus
Also called Narrow-leaved-spleenwort, Glade fern
Homalosorus is a genus of fern with only one species, Homalosorus pycnocarpos. It may also be referred to by its older synonyms Athyrium pycnocarpon and Diplazium pycnocarpon. Commonly referred to as the narrow-leaved glade fern, narrow-leaved-spleenwort, or glade fern, it is endemic to eastern North America and typically grows in moist woodlands. Once classified in the family Athyriaceae due to its linear, often doubled sori, in the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is placed in the small family Diplaziopsidaceae, whose other three species are native to east Asia. Other sources place the genus in the subfamily Diplaziopsidoideae of a very broadly defined family Aspleniaceae, equivalent to the suborder Aspleniineae in PPG I.
Homalosorus pycnocarpos is endemic to eastern North America. It is widespread from southern Ontario to the Gulf of Mexico and west to Minnesota and Arkansas. It grows in moist (mesophytic) woods and ravines in neutral or basic soils, at elevations of 150–1,000 m (500–3,300 ft).
Text excerpted from the Wikipedia article Homalosorus by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
