1. Amanita sp-Litten_L-715, Ampersand Mtn., Harrietstown, Franklin Co., New York, U.S.A.
The following material is based on original research by R.E. Tulloss and C. Rodríguez Caycedo.
The light cream cap is 80 mm wide, convex to planar, and has a very slight knob in the center. The cap's edge is grooved. Volval remnants are absent.
The crowded cream-white gills are broadly attached to the stipe, and may sometimes have brown stains at mid-radius. Reverse forking may be present for about 0.5 mm near the stem. The gills have fringed edges.
The white stem is 140 x 18 mm, narrows upward, has plentiful yellowish fine threads in the upper half, and yellowish flakes in the lower half. In recent collection, the base of the stem has seemed very likely to decay while the pileus had not yet completely expanded. The thick, white, sac-like volva is very fragile and separates from the stem when collected and usually appears to be in a state of decay—even appearing to be "liquifying."
Odor and taste of this taxon have not been recorded.
The spores are 9.4 - 11.2 (-11.5) × (7.7-) 8.7 10.1 (-10.5) μm, inamyloid, and globose to subglobose to broadly ellipsoid.
The present taxon is usually found growing singly.
In Maine, it occured among conifer litter in an open road
through mixed woods. It has also been collected in
New York in moss over dark wet loam, in an old growth
forest with Maple (Acer), American Beech (Fagus
grandifolia), Birch (Betula), Eastern Hemlock
(Tsuga canadensis) and in open, regrown, mixed woods
including Maple (Acer), Birch (Betula),
Eastern Hemlock (F. grandifolia), Spruce
(Picea), Eastern Hemlock (T. canadensis),
Red Pine (Pinus resinosa), and Eastern White Pine
This species was first called to RET's attention by
Walter Litten. In the past, it was called A.
sp-Litten_L-715 —R. E. Tulloss, C. Rodríguez Caycedo, and
This species is named in honor of Dr. Walter Litten,
who sent me the collection that made me aware of
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13.viii.2011 Jacques Brochard s.n. [Tulloss 8-13-11-A] (RET 479-8)
L. Nagy, Agaricales Diversification, Szeged Univ.
The material below is based on the field notes of Walter Litten and original research by R. E. Tulloss and C. Rodríguez Caycedo.
64 - 88 mm wide, light cream (e.g., 2A2), sometimes white at margin, nearly plane, glabrous; context ??; margin short striate (0.2R), nonappendiculate; universal veil absent.
adnate, crowded, cream, ?with brown stains at mid-raidus, pinkish in exsiccatum, ?sometimes almost all with reverse forking for about 0.5 mm near stipe, with lacinate edges; lamellulae ??.
140 × 18 mm, white, narrowing upward, with plentiful yellowish fibrils in upper half and yellowish fibrillose flakes in lower half; context ??; exannulate; universal veil as saccate volva, white, thick but fragile, separating from stipe when collected [Litten], "appearing to liquify on handling" [Litten].
[40/2/2] (9.4-) 9.8 - 11.5 × (7.7-) 8.4 - 10.1 (-10.5) μm (L = 10.3 - 10.8 μm; L' = 10.6 μm; W = 9.2 μm; W' = 9.2 μm; Q = (1.03-) 1.04 - 1.25 (-1.31); Q = 1.12 - 1.17; Q' = 1.15), hyaline, colorless, thin-walled, smooth, inamyloid, globose to subglobose to broadly ellipsoid, rarely ellipsoid, adaxially flattened; apiculus sublateral, ??; contents ??; color in deposit not recorded.
Solitary. Maine: In conifer duff in an open road through mixed woods. New York: At ca. 560 m elev. In moss over very dark, wet loam, in open, old growth forest with Acer, Fagus grandifolia, Betula, and Tsuga canadensis or in open, regrown, mixed woods including Acer, Betula, F. grandifolia, Picea, T. canadensis, Pinus resinosa, and P. strobus.
Each spore data set is intended to comprise a set of measurements from a single specimen made by a single observer;
and explanations prepared for this site talk about specimen-observer pairs associated with each data set.
Combining more data into a single data set is non-optimal because it obscures observer differences
(which may be valuable for instructional purposes, for example) and may obscure instances in which
a single collection inadvertently contains a mixture of taxa.