Several species belonging to the genus Collopus are represented in New Zealand, all of them closely related to the extremely variable C. epipterygius. Examined material: KIRK 20, BERGGREN 18; COLENso b 847.

Pileus membranaceous, campanulate, obtuse, becoming more or less expanded, never truly depressed, striate, covered with a pellicle that is very viscid in wet weather and easily separable in every atmospheric condition, colour variable, usually grey, or often pale yellowish-green near the margin, which is often minutely notched when young, 1-2.5 cm. across; gills adnate, with a decurrent tooth, thin, whitish or with a tinge of grey; spores elliptical, 8-10 x 4-5 µ; stem 5-10 cm. long, about 2 mm. thick, hollow, tough, often wavy, base rooting and fibrillose, even, viscid, usually yellowish but sometimes grey, pallid, or whitish.

New Zealand. Europe, Siberia, United States.

On branches, twigs, among moss, &c.

Solitary or clustered. Colour variable, but readily known by the viscid pileus, and stem, both being furnished with a slimy separable pellicle.