First person to use this name on MO: Ryan Patrick
Name: Panaeolus desertorum
Author: (Velen. & Dvořák) E.F. Malysheva
Citation: Malysheva, Ekaterina & Moreno, Gabriel & Villarreal, Manuel & Malysheva, Vera & Svetasheva, Tatyana. (2019). The secotioid genus Galeropsis (Agaricomycetes, Basidiomycota): a real taxonomic unit or ecological phenomenon?. Mycological Progress. 18. 805-831. 10.1007/s11557-019-01490-6.
Deprecated Synonyms: Galeropsis desertorum Velen. & Dvořák
Basionym: Galeropsis desertorum Velen. & Dvořák,
Mykologia 7(9–10): 106 (1930).
= Gastrocybe iberica G. Moreno, Illana & Heykoop,
Cryptogamie Mycologie 8(4): 323 (1987).
MycoBank No. MB 829487
Pileus (6)10–37 mm high and (2)3–8 mm broad, cylindrical-conical, elongated or fusiform,
often spirally contorted, always longer than broad, mucronate at apex, margin incurved or adhered to stipe, usually longitu- dinally striate but not sulcate, fibrillose, hygrophanous, leather-straw-colored to dull ochraceous, in herbarium dull grayish brown or ash-colored, not shining, not viscid, smooth. Lamellae narrow, crowded, not anastomosing but sometimes forked as the bases, often agglutinate, adnate, rufous or ochraceous brown. Stipe (10)15–55(80) × 1–2.5 mm, slender, cylindrical or slightly broadened towards base, longitudinally fibrillose, uniformly pruinose, ochraceous.
Basidiospores [160, 6, 6] (12.5)13.5–18(21.5) × 7– 12(17.7) μm, avl × avw = 15.0 × 8.8 μm, Q = 1.22–2.25, avQ = 1.70, extremely variable in shape and size, ellipsoid or broadly ellipsoid, amygdaliform or limoniform, some lentiform, pyriform or bean-shaped, slightly to strongly thick-walled, lightly colored, ochraceous, honey-colored or grayish brown, with wide (to 2 μm), central, often papillate, germ pore or broad hyaline zone instead, and with broad apiculus. Basidia 1–4-spored (in different basidiocarps different type predominates), 18–25(35) × 8– 12(16) μm, broadly clavate or saccate, with short pedicel and long thick sterigmata, sometimes pigmented (up to 10– 20 μm long and 3 μm wide). Pseudoparaphyses often pres- ent, broadly clavate or utriform, similar in size to basidia. Hymenial cystidia not observed. Pileipellis a hymeniderm, consisting of chains of spheropedunculate, pyriform or broadly clavate, thin-walled or slightly thick-walled, hya- line or yellowish elements, 10–35 × 8–22 μm, (but in one collection the outer layer of pileipellis made up of long, cylindrical or narrowly clavate elements, 10–35 × 5– 9.5 μm). Pileocystidia usually absent or present, if present then very abundant, hyalines, lageniform at the base, with long cylindrical neck and subcapitate apex, up to 60 × 15 × 6(8) μm. Stipitipellis a cutis, made up of thin-walled, hya- line hyphae 4–10 μm broad. Caulocystidia rather numerous (as an exception absent), 10–45(60) × 5.5–12 μm, often in bundles, variable in shape, cylindrical with subcapitate apex, clavate, utriform or lageniform, hyaline, thin- or slightly thick-walled. Clamp connections present.
Ecology Solitary or in small groups; on different soil in wet grassy areas (meadows, or ruderal places) or in steppe areas.
Distribution Western and Eastern Europe.