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More info for the terms: fern, fronds, sporangia

Cinnamon fern is a perennial fern which is native to the eastern United
States. Rhizomes of sporophytic plants are stout, woody [49], and
creeping [18] to suberect [7]; the roots are fibrous [49]. Sporophytes
have separate fertile and sterile pinnate fronds are covered with thick
hairs when immature. Some hairs are still present on fertile fronds at
maturity [7]. Sterile fronds are up to 6 feet (1.8 m) long [65] and 6
to 12 inches (15-30 cm) [49] wide. Fertile fronds are shorter than
sterile fronds, and the pinnae are much smaller, nonphotosynthetic, and
cinnamon brown. Sporangia are clustered, naked, large, globose, and
bivalved [7]. Cinnamon fern spores are green, with functional
chloroplasts. The spores germinate into photosynthetic, platelike,
thalloid gametophytes [23,42].



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