Deparia acrostichoides (Athyrium thelypterioides, Asplenium acrostichoides, Deparia a.) silvery glade-fern Aspleniaceae ATTH; R;

  

Deparia acrostichoides (Athyrium achrostichoides; silvery glade fern). en.wikipedia.org

Deparia acrostichoides (Athyrium achrostichoides; silvery glade fern). en.wikipedia.org (Accessed 10/2017).

Deparia acrostichoides is a fern from a short, creeping rhizome. 

Deparia acrostichoides (silvery glade fern).frond.copyright  David G. Smith. Delaware Wildflowers. delawarewildflowers.org

Deparia acrostichoides (silvery glade fern).frond. copyright David G. Smith. Delaware Wildflowers. delawarewildflowers.org (Accessed 10/2017).

Leaves 35-110 cm; blade longer than stalk, 13-22 cm wide, once pinnate and pinnately lobed, tip sharply long-pointed, pinnately divided, basal leaflets reduced and pointing downward, midrib (rachis) hairy, slightly scaly, hairy, leaflets 15-20 per side, stalkless, tips long-pointed, deeply, regularly lobed, lobes to 1.3 cm long, 0.6 cm wide, oblong, round-tipped with margins entire to barely toothed. 

Deparia acrostichoides (silvery glade fern).fertile frond with sori. copyright David G. Smith. Delaware Wildflowers. delawarewildflowers.org

Deparia acrostichoides (silvery glade fern).fertile frond with sori. copyright David G. Smith. Delaware Wildflowers. delawarewildflowers.org (Accessed 10/2017)

Spore cases elongate, to 0.2 cm, 3-7 pairs per side, along pinnate veins of leaflet lobes, silvery with yellowish hairs, becoming pale brown (Cobb 1963). 

Wetland status: FAC. 

Frequency in NYC: Very infrequent. 

Origin: Native to NYC. 

Habitat: Moist woods in rich soil pH 4.5-7, tolerant of shade, intolerant of fire, salt, anaerobic soil, drought (USDA, NRCS 2006).