Saccharinus is from saccharum, sugar; it is so called because the white pileus looks very much like loaf sugar.
The pileus is entirely white, membranaceous, convex, somewhat papillate, smooth, sulcate and plicate.
The gills are broadly and firmly attached to the stem, narrow, thick, very distant, united by veins, whitish.
The stem is quite thin, thread-form, attenuated upward, at first flocculose, at length becoming smooth, inserted obliquely, reddish, pale at the apex. Spores, 5×3µ.
Quite common in wet weather on dead oak limbs in woods. This plant differs from M. epiphyllus in its habitat, in the papillate form of its pileus and the stem's being flocculose, then smooth; also in that the gills are united in a reticulated manner. Common. July to October.
Marasmius epiphyllus. Fr.
The Leaf Marasmius. Edible.
Epiphyllus means growing on leaves.
The pileus is white, membranaceous, nearly plane, at length umbilicate, smooth, wrinkled, plicate.
The gills are firmly attached to the stem, white, connected by veins, entire, distant, few.