pulchella de Meijer & Vellinga from Brazil differs from M. velosa by longer basidiospores (10.0–14.5 × 6.0–7.5 μm), shorter cheilocystidia (23–42 μm), and the squamules made up of clavate elements and long, colorless emerging hyphae; M. eucharis Vellinga & Halling from Australia differs in larger basidiospores (10.8–15.5 × 7.0–9.0 μm), wider and shorter cheilocystidia (25–53 × 5.0–12.0 μm), and squamules lacking ellipsoid to globose or clavate elements. Macrolepiota brunnescens Vellinga, also from South America, has velar patches on the pileus, but becomes

Ricolinostat supplier brown in all part. Macrolepiota clelandii Grgur. superficially resembles M. velosa, but differs from the latter by the absence of a volva at the base of the stipe, the predominantly 2-spored basidia, and much bigger spores up to 28.5 × 15.5 μm (Vellinga 2003). Macrolepiota velosa is also known from northern Thailand; its edibility remains unknown. Doubtful Galunisertib Species KU55933 chemical structure and taxa recorded from China but with uncertainty Macrolepiota crustosa L.P. Shao & C.T. Xiang in Journal of North-eastern Forestry Institute 8 (4): 36. 1980. The original description reads: “Fructificatio solitarius vel gregarius; pileus 6–13, cm. latus, carnosus, mollis e globoso demum explanatus vel depressus, centro mamillis, crustis albo-cinerus vestitus, centro demum fuligineus, lobo frastoso, peripheria facile exutus, exer albo-caro, polygonalibus, fibrillosis; caro alba, fracta

demum lutescens, inodora, sapore grato; stipes cavus, levis, albo-griseus, bulbo amplisssimo, 17–22 cm. longus, 8–11 mm. crassus; annulus mobolis, fibroso-lacerus; lamellae distantes, latae albae, fractae incarnatae; sporae ovoideo-ellipsoideae, chlorino-hyalinae, 11–14.5 × 6–8 μ; basidia cylindraceo-clavata, 34–44 × 10–11.9 μ.—Esculenta. Hab: Heilongjiang, Dai-ling, ad terram in pinelis, 18, VIII, 1974, Shao Li-ping, Siang Cun-ti, no. 74210 (Typus) Obs: Species Macrolepiotae procerae et Macrolepiotae rachodese affinis, a priore stipes minute squamis differt, a posteriore carne aere rubescente et in centro pileo emamillae, sapore parum grato facile dignoscendo differ.” Comment: According to the description

and the habit depicted in Fig. 2 in Shao et Siang (1980), M. crustosa is more similar to M. mastoidea than to Racecadotril M. procera, but “the smooth stipe and the white context changes yellow” reminds us of a Chlorophyllum species. HMAS 76557, collected from Huma in Heilongjiang province and determained by X. L. Mao as M. crustosa, turned out to be a misidentification of M. mastoidea. Because the type of M. crustosa is lost, its taxonomic uncertainty remains. Macrolepiota prominens (Viv. : Fr.) M.M. Moser, in Gams, Kleine Kryptogamenflora, Edn 3 (Stuttgart) 2b/2: 184. 1967 Macrolepiota prominens, clearly belongs to the M. mastoidea group, is characterized by a conspicuous protruding umbo on the pileus, a simple broad annulus, and lamellae edges which become black with age (Wasser 1993). Teng (1996) and Mao (2000) recorded this species for China.