absent when mature; without a ring . flesh: white at first, becoming yellow in age; soft; not staining when sliced. odor and taste : not distinctive. chemical reactions : ammonia purplish on cap surface; pinkish to negative on flesh. koh dark gray to black on cap surface; lilac to gray on flesh. iron salts...
: pale yellow; staining blue in the stem base when exposed, elsewhere not staining or staining pinkish to brownish. odor and taste : mild or slightly acidic. chemical reactions : ammonia grayish on cap; pale grayish lilac on flesh. koh olive gray becoming dark gray on cap; dark gray on flesh. iron salts...
glandular dots . flesh: whitish to yellowish; not staining on exposure, or staining slowly pinkish. odor and taste : not distinctive. chemical reactions : ammonia rusty brown, then grayish lilac on cap surface; rusty brown, then blackish on flesh. koh greenish black on cap surface and flesh. iron salts...
elongated with maturity; without a ring . flesh: whitish to yellowish in the cap; yellow in the stem; not staining on exposure. odor and taste : not distinctive. chemical reactions : ammonia red on cap surface; pinkish to purplish on flesh. koh dark gray on cap surface; purplish gray on flesh. iron salts...
yellow to whitish, or with age reddish in the mid-portion of the stem and around damaged areas; changing to bluish or blue when sliced. odor and taste : not distinctive. chemical reactions (per grund & harrison, ): ammonia black on cap; brownish on flesh. koh black on cap; brownish on flesh. iron salts...
reticulate but also often smooth and lacking reticulation. flesh: white to yellowish; staining blue on exposure. odor and taste : odor not distinctive; taste bitter. chemical reactions : ammonia negative on cap surface and flesh. koh on cap surface negative to pale orange; on flesh orangish. iron salts...
flesh: whitish to yellow; bluing on exposure. odor and taste : not distinctive. chemical reactions : ammonia negative to slowly red or blackish on cap surface; erasing blued areas of flesh to yellowish or orangish. koh orange to negative or brownish on cap surface; yellowish to orangish on flesh. iron salts...
bruising greenish to bluish, then grayish brown. flesh: yellow; often red in the stem base; staining quickly blue on exposure. odor and taste : taste not distinctive or acidic; odor not distinctive. chemical reactions : ammonia negative on cap surface. koh orange to red on cap surface and flesh. iron salts...
on exposure, or staining faintly bluish. odor and taste : pleasant; not distinctive. chemical reactions : ammonia flashing green to blue-green on cap surface, then resolving to reddish brown; flashing greenish on flesh, then resolving to negative. koh purple on cap surface; orangish on flesh. iron salts...
brownish reticulation--or at times only finely reticulate. flesh: white; not staining on exposure. odor and taste : not distinctive. chemical reactions : ammonia dark yellow with a purplish ring on cap surface; negative to grayish on flesh. koh similar to ammonia on cap surface; grayish on flesh. iron salts...