Naucoria arvalis var. tuberigena (Quél.) Sacc. & Traverso 1948 Naucoria tuberosa Henn. 1903 Simocybe arvalis (Fr.) P. Karst. 1879
Shrink list ... Habit of Growth:
Mushroom is not protected
Cap: 1-4 cm across, first hemispherical to conical, later convex, plane if old, sometimes with indented center, hygrophanous, dark ocher brown and butyraceous if wet, if dry beige and dull, sometimes little wrinkled, margin is inrolled for a long time, later acute.
Hymenophore: lamellae are first pale beige, later tobacco to reddish brown, broad, ascending and finely adnexed, edges are pale ciliate.
Spore print: tobacco brown
Spore: elliptic, 8,6-11 x 4,6-5,8 μm
Stem: 4-9 x 0,2-0,4 cm, cylindric, without annulus, elastic, hollow, whitish to beige, entire length is whitish pruinose to little longitudinally fibrillose, base is with white rhizoids and attched to a subglobose sclerotium which is blackish on the outside and white within and buried in the ground.
Flesh: whitish, thin, odorless, taste is bitterish, with a farinaceous component.
Habitat: solitary to gregarious in meadows, pastures, fields, gardens, parks, on compost heaps, or humus rich soils, grows from summer to fall.