Gymnopus stenophyllus (Mont.) J. L. Mata & R. H. Petersen 2004

Marasmius stenophyllus Mont. Ann. Sci. Nat. IV. 1:116. 1854
^Marasmius hyperellus Fries, Nova Acta Soc. Sci. Upsal. III. 1: 30. 1851. Marasmius semiustus Berk. & Curt. Jour. I^inn. Soc, 10: 295. 1868. Marasmius ienerrimus Berk. & Curt. Jour. I^inn. Soc. 10: 296. 1868.
Pileus thin, soft, fleshy, but tough and persistent, convex to irregularly expanded, umbilicate, becoming eccentric with age, gregarious to cespitose, 1-4 cm. broad; surface minutely fibrillose to glabrous, radiate-rugose, hygrophanous, pale-yellowish-white to pale-reddishtan, margin concolorous, incurved when young: lamellae adnate with a slight collar, rarely shortdecurrent, rather distant, broad, inserted, the long ones ventricose, white, interveined, often forking: spores ellipsoid, smooth, hyaline, about 7-9X5-6 /z: stipe tough, cylindric, tapering upward, usually curved, glabrous, white at the apex, pale-reddish below, whitish-mycelioid at the base, solid or spongy, at first central, often strongly eccentric with age, 1-4 cm. long, 1-2 mm. thick.
Type locamty: French Guiana.
Habitat: On banana trash and decayed stalks and logs.
Distribution: Jamaica, Trinidad, British Honduras, Cuba, and Grenada; also in Guiana

Marasmiellus stenophyllus is a plant pathogen that causes Marasmius sheath and shoot blight on sugarcane.