page_title: Agaricus brunneofibrillosus
section_title: Description
hierarchical_section_title: Agaricus brunneofibrillosus / Description
caption_attribution_description: English: This image is Image Number 300365 at Mushroom Observer, a source for mycological images. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing. English&#160;| español&#160;| français&#160;| italiano&#160;| македонски&#160;| മലയാളം&#160;| português&#160;| +/−
context_page_description: Agaricus brunneofibrillosus is a mushroom in the family Agaricaceae. It has a medium to dark brown cap up to 6 cm in diameter with brownish fibrillose scales that darken in age. The tightly-packed gills are initially cream colored before becoming pinkish, lilac-gray, and finally brownish as the spores mature. The stout stem is enlarged to bulbous at the base which has one or more brown bands, and a white, membranous ring. The mushroom is edible, and has a pleasant odor similar to button mushrooms, and tastes similar to Agaricus bisporus when cooked.
context_section_description: The cap is initially convex before flattening out, and reaches a diameter of 4–15 cm (1.6–5.9 in). The cap surface is dry, smooth, reddish-brown to coco-brown with silky fibrils or sometimes with flattened scales and often has a slight umbo. In maturity, the fibrils usually darken to walnut brown.  The flesh is light brown and does not change color in KOH. When bruised or injured, the flesh turns bright red within 30 seconds, and later fades to brown. The odor of crushed flesh is mild and mushroomy.
  The gills are initially cream colored to pale pinkish or pinkish-gray before becoming brown, then dark chocolate-brown when the spores mature. In maturity, the gills are free from attachment to the stem, packed close together, with little intervening space between them. The stem is 4–15 cm (1.6–5.9 in) long, and 1.5–2.5 cm (0.6–1.0 in) thick, usually with an enlarged or bulbous base that has one or more coca-brown colored bands. Firm, smooth, and lacking the scales found on the cap, the stem is colored white or discolors bright red or dingy brownish in age or after handling.  The partial veil is membranous, white, and forms a thin skirt-like ring on the upper portion of the stem.
  Spore prints are dark chocolate brown. The smooth, thick-walled spores are elliptical, and typically measure 5–6.5 by 3.5-4 μm.  Cystidia on the gill edge (cheilocystidia) are scattered, club-shaped to cylindric and have dimensions of up to 22 by 7 μm.
caption: Spores 1000x
exif: {"Image Make": "Canon", "Image Model": "Canon EOS 60D", "Image Orientation": "Horizontal (normal)", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image DateTime": "2013:01:05 19:01:25", "Image Artist": "", "Image YCbCrPositioning": "Co-sited", "Image Copyright": "", "Image ExifOffset": "202", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "8230", "Thumbnail JPEGInterchangeFormatLength": "8682", "EXIF ExposureTime": "3/5", "EXIF FNumber": "0", "EXIF ExposureProgram": "Manual", "EXIF ISOSpeedRatings": "800", "EXIF ExifVersion": "0230", "EXIF DateTimeOriginal": "2013:01:05 18:55:47", "EXIF DateTimeDigitized": "2013:01:05 18:55:47", "EXIF ComponentsConfiguration": "YCbCr", "EXIF ShutterSpeedValue": "3/4", "EXIF ApertureValue": "2147483648", "EXIF ExposureBiasValue": "0", "EXIF MeteringMode": "Pattern", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "50", "EXIF SubSecTime": "11", "EXIF SubSecTimeOriginal": "11", "EXIF SubSecTimeDigitized": "11", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "2592", "EXIF ExifImageLength": "1728", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "8106", "EXIF FocalPlaneXResolution": "518400/181", "EXIF FocalPlaneYResolution": "345600/119", "EXIF FocalPlaneResolutionUnit": "2", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Manual Exposure", "EXIF WhiteBalance": "Manual", "EXIF SceneCaptureType": "Standard"}