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Stropharia semiglobata

Stropharia semiglobata - Fungi species | sokos jishebi | სოკოს ჯიშები

Stropharia semiglobata

Pileus
Cap 2.0-4.0 cm broad, hemispheric, expanding to convex, with or without a low umbo; margin incurved, then decurved, occasionally appendiculate with veil fragments; surface viscid when moist, drying glossy, glabrous, pale-yellow, tinged tan at the disc, not hygrophanous; context up to 5.0 mm thick at the disc, thin at the margin, soft, watery-cream-yellow, unchanging, odor and taste cucumber-like, harsh; mild according to some authors.

Lamellae
Gills adnexed to notched with a decurrent tooth, sub-distant, relatively broad, up to 8.0 mm wide, cream-colored in youth, then greyish, dark purple-brown in age, edges lighter than the faces; lameullae in up to four series.

Stipe
Stipe 3.0-8.0 cm long, 2.0-5.0 mm thick, slender, stuffed or hollow, equal to slightly enlarged at the base; surface of apex colored like the cap, dry, pruinose-striate, viscid below, cream-colored with scattered light-brown, appressed fibrils, more concentrated towards the base; partial veil pallid, thin, membranous, with a glutinous coating, forming a narrow, superior annulus, flattened to the stipe, soon blackened from spores, or leaving fragments on the cap margin.

Spores
Spores 15.0-20.0 x 7.5-10.0 µm, elliptical to almond-shaped in face-view and profile, smooth, thick-walled, with an apical germ pore, purple-brown mounted in water, hilar appendage inconspicuous; spore print purple-brown.

Habitat
Solitary or in small groups on horse and cow dung or in manured pastures; fruiting throughout the mushroom season after rainy periods; common in its favored habitat.

Edibility
Questionable.

Comments
Stropharia semiglobata is a slender, dung-dwelling species recognized by a viscid, dull-yellowish cap, viscid lower stipe, and glutinous, evanescent ring. Its occurrence on manure is a helpful but not definitive field character. Other mushrooms that fruit here include Psilocybe coprophila and its close cousin Psilocybe merdaria which differs in having reddish-brown to brown sub-viscid caps and lack of a ring. Panaeolus papilionaceus has a greyish-brown, fringed, non-viscid cap and also lacks a ring. Panaeolus semiovatus is a larger, annulate species with a cream-colored, distinctively wrinkled, viscid cap. Fruitings of Stropharia semiglobata in manure-rich grass can be confused with Agrocybe pediades and Stropharia coronilla. Both species have similar cream-colored, subviscid caps. Stropharia coronilla, however, differs in possessing a non-viscid, striate-margined annulus, while Agrocybe pediades lacks a ring, and has brown, not purple-brown gills and spores. Finally, compare with Bolbitius vitellinus, which occasionally fruits on dung. It has a viscid, yellowish cap with a striate margin, ochre-colored gills, and lacks a veil. Several varieties of Stropharia semiglobata have been described, but are not treated separately here.

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