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Amanita vaginata : ウィキペディア英語版 | Amanita vaginata
''Amanita vaginata'', commonly known as the grisette, is an edible mushroom in the Amanitaceae family of fungi. Unlike many other ''Amanita'' mushrooms, ''A. vaginata'' lacks a ring on the stem. The cap is gray or brownish, in diameter, and has furrows around the edge that duplicate the gill pattern underneath. It has a widespread distribution in North America, and is thought to be part of a species complex that includes other similar-looking Amanitas. == Description == The cap is in diameter and gray to grayish-brown in color; initially the cap is oval, then as it matures it becomes progressively conical, convex, and eventually flattened, sometimes with a small umbo (a rounded elevation in the center of the cap).〔 (Google Books )〕 The gills are white, free (not attached to the stem) to narrowly attached, moderately crowded together, and sometimes have a grayish tint; the lamellulae (small gills that run from the edge of the cap towards the stem) are truncate. The flesh is white and thin, and does not change color upon bruising or injury. The stem is long and thick.〔 Unlike many other Amanitas with stems that are swollen at the base (bulbous), the thickness of the ''A. vaginata'' stem is roughly the same at both ends. The stem surface is covered with a finely powdered bloom (pruinose), especially near the top; faint longitudinal lines may be seen.〔 The base of the stem is enclosed in a loose, sack-like volva that may discolor grayish or reddish brown.〔 The spore print is white. The variant ''A. vaginata'' var. ''alba'' is pure white, and has a volva that is either absent, or not constricted around the base of the stem.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Amanita vaginata」の詳細全文を読む
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