The following is based on the original research of RET.
The cap is 20 - 55 mm wide and is pale brownish gray
to darker brown in the center. The cap is often
spotted with irregular pale yellow markings and has a
depigmented region near the center. The cap's
flesh is white, to grayish in the center. The
cap's edge is striate for about a quarter to a half
of its radius. Volval remnants are absent or
are present as a membranous patch that is easily
detached from the cap.
The off-white gills are free to narrowly attached and are crowded. Short gills are variable in length and abruptly cut off squarely or with the corner rounded. The gills may be dark brown in old wounds.
The white to pale brown stem is 51 - 88 × 3 - 8 mm and becomes grayer with handling. The stem narrows upward slightly and is finely striated along its length. The stem’s flesh is off-white with a faint brown tint. The sack-like volva is white on both the inner and outer surfaces and is leathery and membranous.
This mushroom is odorless; and its taste has not been recorded.
(8.0-) 9.4 - 14.7 (-17.1) × (7.0-) 9.1 - 13.6 (-16.8) µm and are inamyloid and globose to subglobose to broadly ellipsoid. Clamps are probably absent from bases of basidia.
Amanita sp-N09 has been found in New York and New Jersey in loamy clay or humus, sometimes in very moist soils. Possible symbiotic trees include Canadian hemlock and hickories. This species can be distinguished by its size and its brown cap that is spotted irregularly with pale yellow olive. In addition the cap has a notable depigmented area (or patch of volval remnant) near its center.—R. E. Tulloss and N. Goldman
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20 - 55 (-70) mm wide, pale brownish gray to brownish gray to darker brown over disk (5B2, 5C3) to browner than 5E7, but not nearly as dark as 5F7, often maculate with irregular pale yellowish marks irregularly distributed, sometimes zonate, often with depigmented region near center (especially if universal veil absent), ovate, than campanulate, then broadly conic, then convex, umbonate, subshiny to shiny (when wet), tacky to viscid (when wet); context white, sometimes grayish in disk in larger basidiomes, with faint watersoaked line at interface to lamellae, 1 - 2 (-4.5) mm thick above stipe, thinning evenly to a membrane in about three quarters of radius; margin striate (0.25 - 0.35 (-0.45)R) to tuberculate striate, nonappendiculate; universal veil absent or as a detersile patch, subverruculose, membranous, not changing color when cut or bruised.
free to narrowly adnate or adnate by a mere line, without decurrent line on stipe apex, subcrowded to crowded, whitish to off-white to cream to a dingy variant of these colors both in mass and in side view, occasionally dark brown in old wounds, 2 - 4.5 (-6) mm broad; lamellulae truncate to subtruncate to rounded truncate, to truncate with attenuate tooth at pileus context, length very variable, common.
51 - 88 (-123) × 3 - 8 (-10) mm, white to very pale brown to white with grayish tints in lower half, browning or becoming grayer from handling, sometimes with a small, subradicating projection on base of stipe, narrowing upward slightly, not flaring at apex or flaring only very close to apex, surface minutely pulverulent above, minutely fibrillose (10× lens) below, finely longitudinally striatulate; context< off white with a faint brownish tint or grayish white, concolorous in larva tunnels, stuffed to hollow, with stuffing of white to grayish white cottony to felted material, with 2.5 - 6 mm wide central cylinder; exannulate; universal veil as saccate volva, white on inner and external surfaces, external surface browning in age especially on edge, soft, smooth, leathery, tough, membranous, 1- - 2 mm thick at midpoint between connection to stipe and tip of limb, adnate to stipe for one half to two thirds (rarely one third) of distance from stipe base to tip of limb, sometimes with raised narrow exterior ring just below point of attachment, with tip of limb 23 - 44 (-55) mm from stipe base.
Odorless.Taste not recorded.
Spot test for tyrosinase (L-tyrosine ): rapidly positive on surface, and in context, of stipe. Test voucher: ??.
[83/4/4] (8.0-) 9.4 - 14.7 (-17.1) × (7.0-) 9.1 - 13.6 (-16.8) µm, (L = 10.8 - 12.2 µm; L’ = 11.5 µm; W = 10.0 - 11.4 µm; W’ = 10.7 µm; Q = 1.0 - 1.14 (-1.20); Q = 1.06 - 1.08; Q’ = 1.07), inamyloid, smooth, thin-walled, hyaline, globose to subglobose to broadly ellipsoid; contents ??-guttulate, often with additional small granules; apiculus sublateral, truncate conic, to 1.7 µm long; ?? in deposit.
Solitary. New Jersey: In humus associated with ??. New York: In loam or loamy clay under Tsuga canadensis or in very wet woods under Carya spp. including Carya ovata with Acer sp.
U.S.A.: NEW JERSEY—Hunterdon Co. - Lebanon, Oakmoss Mycol. Preserve [40°38'50.07" N/ 74°47'50.92" W], 25.vii.2007 Richard Balsley s.n. (in herb. R. Balsley; RET 409-6).
NEW YORK—Delaware Co. - Emmon’s Bog, 17.viii.1985 Ms. G. Van Matre s.n. [Tulloss 8-17-85-C] (RET 101-10). Otsego Co. - Oneonta, College Camp, 16.viii.1985 Ursula Hoffman s.n. [Tulloss 8-16-85-G] (RET 102-1). Schenectady Co. - Mariaville, 18.viii.1986 M. A. King & R. E. Tulloss 8-18-86-A (RET 468-8), -B (RET 468-3). Unkn. Co. - Pine Lake Campus, ca. border of Otsego & Delaware Cos., 17.viii.1985 Richard Youst s.n. [Tulloss 8-17-85-B] (RET 101-9).
This mall species can be distinguished by its size, its sepiaceous brown pileus spotted irregularly with paler yellow or olivaceous yellow and by its bearing a notable depigmented area or small patch of universal veil near or at the center of the disc.
—R. E. Tulloss
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