Arachnion album

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Ecology: Saprobic; terrestrial; growing gregariously in or near grassy areas (lawns, pastures, ditches, golf courses, and so on); summer and fall; widely distributed and fairly common east of the Rocky Mountains; rarely reported from Oregon. The illustrated and described collections are from Illinois and Indiana.

Fruiting Body: Shaped like a ball, or nearly so; 1-2.5 cm across; 1-2.5 cm high; whitish to very pale brownish when fresh, becoming brownish with old age; surface bald; skin paper thin; interior composed of tiny sand-like granules—white at first, then yellowish, then light gray and eventually dark gray; sterile base absent.

Odor and Taste: Not distinctive.

Microscopic Features: Spores 3-5 x 3-4 m; broadly ellipsoid or occasionally subglobose, with or without a short (1-2 m) pedicel; smooth; hyaline to greenish-yellowish in KOH. Capillitium and paracapillitium not found. Peridioles 250-500 x 200-300 m; ellipsoid or subglobose; brownish yellow; filamentous hyaline hyphae 2-8 m wide present on the surfaces.

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