Fissidens neoni

Fissidens neoni (E. Bartr.) Grout, Moss Fl. N. Am. 1: 249. 1939.
Moenkemeyera Neoni E. Bartr. Bryologist 34: 77. 1932.
Plants minute, dull yellowish green, closely gregarious, radiculose at base, the male and female plants matted together; stems of fruiting plants about 1 mm. high, imbedded in soil; leaves 3-4 pairs, the lower very small, with vaginant laminae only, the upper abruptly larger, 0.6-0.8 mm. long, ovate to broadly lanceolate, the margins slightly crenulate, the costa percurrent or ending just below the apex; vaginant laminae extending about four-fifths the distance to the apex; dorsal lamina ending about half-way down in the broader leaves, in some of the narrower leaves reaching nearly to the insertion; perichaetial pair of leaves reaching 1 mm. in length; leaf-cells rhomboidal and hexagonal, 8-10 ju in diameter, smooth; margins of the vaginant laminae and frequently the medial margin of dorsal lamina bordered by narrowly linear cells; apical margins not bordered; sterile stems simple or branched, 3-4 mm. long, their leaves in 10-20 pairs, 0.5 X 0.8 mm. oblong-ovate, the border usually distinct on the vaginant laminae; dioicous; male plant bearing a few antheridia enclosed by 3-4 laxly areolate concave perigonial leaves, these broadly notched at the apex of the vaginant laminae; seta terminal, reddish, 2.5-3 mm. long; capsule erect, oblong-cyHndric, up to 1.5 mm. long X 0.5 mm. broad, contracted under the mouth when dry; peristome-teeth 16, not divided, erectspreading when dry, strongly incurved when moist, nearly smooth below, papillose in the upper part, not striate, fragile; calyptra very small and fugacious; operculum conic-rostrate, erect; spores minutely papillose, 20-25 /x in diameter.
Type locality: Vicinity of Lafeyette, Louisiana, March 30, 1931 {Bra. Nion 885). Distribution: Known only from the type locality.