Fig. 7 A well developed annulus can still be observed on the carpophores of this collection (N.Z.), but the spores are definitely different from those of Agrocybe erebia. They have an obvious germ-pore, are thick-walled and measure 8.5-10 X 5.5-6.5 µ.

Pileus convex, then flattened, glabrous, rather viscid, hygrophanous, margin striate, umber, often with an olivaceous tinge, ochraceous-tan and often rugulose or wrinkled when dry, 2.5-5 cm. across; flesh thin, dingy; gills adnate, rather distant, about 4 mm. broad, pallid, then dingy-cinnamon; spores elliptical, 10-12 x 4-6 µ; stem about 5 cm. long, 6-8 mm. thick, equal, somewhat striate, soon pale, hollow; ring, superior, soon pendulous, with the margin upturned, more or less striate.

Ahuriri, Northern Island, New Zealand. Australia, Europe.

On the ground.

Distinguished by the dark-umber colour of the pileus when moist and the superior ring. The pileus is sometimes more or less umbonate, at others slightly depressed; somewhat fragile.

The microscopic characters which delimit A. erebia in Europe are: - Basidiospores 9-13(-15) x (5-)6-7 µm, elongate elliptic in face-view, slightly boletoid in side-view, ochraceous in water and alkali; germ-pore absent. Basidia 2-spored, cylindric-clavate, hyaline. Cheilocystidia variable, vesiculose to ventricose even clavate, 30-60 x 8-25 µm, hyaline; pleurocystidia few to numerous, lageniform, 50-80 x 12-16 µm. apex obtuse, (4-) 6-9 µm broad, hyaline often granular punctate. Pileipellis a palisadoderm of balloon-shaped to pyriform cells 9-15 µm broad. Stipitipellis of filamentous hyphae supporting at stipe-apex sterile cells similar to the cheilocystidia. Clamp-connections apparently absent.