Christmas Fern Spores - Polystichum acrostichoides
I'm trying to understand the structure of ferns, so I may have this wrong... These little, donut-shaped structures are called indusium. They cover the sori, which are composed of many sporangia that, in turn, contain the plant’s spores.
Habitat: Forested wetland
''Polystichum acrostichoides'', commonly denominated Christmas fern, is a perennial, evergreen fern native to eastern North America, from Nova Scotia, Canada west to Minnesota and south to Florida and eastern Texas.
Similar species: Polypodiales
Uploaded Aug 22, 2019. Captured Jun 8, 2019 10:32 in 3280 Franklin Ave, Millbrook, NY 12545, USA.