This is from the same location as an observation by @oxalismtp: https://www.inaturalist.org/observations/111926271

Leaves bright green, pale to brown toward base, pliant, gradually tapering to tip. Hyaline leaf margins extending 1–5 cm above sporangium. Rootstock nearly globose, 2-lobed. Velum covering less than 1/2 of sporangium. (Velum coverage best visualized in the longitudinal section of photos 10 and 11.) Sporangium wall brown-streaked to completely brown. Megaspores white, 350--400 μm diameter, obscurely tuberculate to rugulate; girdle smooth.