新疆伞蕈一新种——巨孢墨伞

COPRINUS GIGANTEOSPORUS, A NEW SPECIES FROM XINJIANG

菌盖高1.5cm,后期阔4.5—5.5cm,被微柔毛,雪白色至象牙白色。盖表层细胞呈梨形,椭圆形或具柄圆形。褶片狭而薄,褶幅阔0.5—1mm,贴生,疏列,初灰白色,后期呈黑色。菌柄长5—8cm,粗1—2.5mm,等粗,有时呈棒状,基部呈臼状膨大,中空而质脆,雪白色至淡白色,基部具粉粒状覆盖物。担孢子22—26×13—19μm,椭圆形或近菱形,棕色,棕黑色。担子近圆形或棒状,30—36×25—28μm,具孢子四枚。

The junior author has been collected an unusual fungus from Pishan (Guma) County in Xinjiang (Sinkiang), on June 21, 1988. This species is very closely related to Coprinus sterquillnus Fr. and Coprinus calypieratus Peck, but differs from them in the very large and subrhombiform spores 22-26×13-19μm. However, the size of spores of Coprinus sterqtiilinus Fr. is only 18-23×10-13μm and C. calyptratus Peck is only 17-21×10-13μm. This is the most unusual species with a whitish pileus, very finely pubescent at least over the center disc, the marginal surface area closely folded-striate before expanding, becoming broadly convex to plane and plicate-striate when maturity, the stipe equal, hollow and rather fragile, densely pubescent at base, always white, not sordid, which at least for the present is being recognized as a new species.