of A. foetens is 70 - 260 mm wide, convex, white, sometimes pinkish or yellowish tinge, dry,
appendiculate, with a nonsulcate margin. At first, the cap is covered with rather small, adnate,
pulverulent-floccose to subfelted, subpyramidal warts to patches on a felted-flocculose background; later the cap
is completely pulverulent-flocculose to squamulose-subfelted, probably glabrescent with age.
The gills are crowded, free, white, and becoming dull cream to yellow. The short
gills are attenuate.
The stem is 80 - 210 × 11 - 33 mm, subcylindrical, solid, firm, white, and floccose
all over or with vague girdles of subfibrillose patches
or nearly glabrous.
The spores measure 8 - 9.5 × 7.5 - 9 µm and are amyloid and globose to
subglobose. Clamps are not found at bases of basidia.
This species was described from Argentina. Recently I have received a report of the present species
from Uruguay thanks to Alejandro Sequeira. Bas (1969) placed
this species in his stirps Thiersii.—R. E. Tulloss
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LIL; isotype, MICH
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The following material not directly from the protolog of the present taxon or another researcher's cited research is based on original research by R. E. Tulloss.
70 - 260 mm wide, white, convex, sometimes with pinkish
or yellowish tinge, dry; context white, unchanging
when cut or bruised; margin nonstriate,
appendiculate; universal veil at first as rather
small, adnate, pulverulent-floccose to subfelted,
subpyramidal warts to patches (said to suggest remnants
of universal veil on A. rubescens Pers. : Fr.) on
a felted-flocculose background, later as a
pulverulent-flocculose to squamulose-subfelted covering
of the entire pileus, probably disappearing with age.
free, crowded, white, becoming dull cream to yellow, up to 18 mm wide; lamellulae attenuate.
80 - 210 × 11 - 33 mm, white, subcylindric, floccose all over or with vague girdles of subfibrillose patches or nearly glabrous; bulb broadly fusiform to broadly clavate; context solid, firm, white, unchanging when cut or bruised; partial veil apical, rather thick, cottony-submembranous, non-striate, mostly falling to pieces; universal veil absent from bulb (but see decoration of stipe, above).
Odor absent when young or very slightly of “chloride of lime,” later strong and unpleasant like “urine” or “tiger den” or “Camembert.” Taste not recorded.
"hardly differentiated," continuous with universal
veil above and pileus context below.
40 - 50 × 9 - 11 μm, 4-sterigmate,
with refractive contents when mature; clamps absent.
On pileus: with elements in tips of warts
more or less co-parallel and anitclinally oriented;
inflated cells 50 - 120 × 10 - 35 μm, some
yellowish and appearing to be refractive,
elongate. On stipe: not described.
Bas (1969): longitudinally acrophysalidic; filamentous
hyphae "rather broad"; inflated cells in subterminal
Bas (1969): [30/2/2] 8.0 - 9.5 × 7.5 - 9.0 μm, (Q = 1.0 - 1.10 (-1.20)), pale yellowish in ammonia, with slightly thickened wall, globose to subglobose to broadly ellipsoid, sometimes attenuating toward apiculus; apiculus strongly projecting; content refractive; white in deposit.
RET from holotype: [20/1/1] (7.2-) 7.5 - 9.5 × (6.0-) 6.8 - 8.2 (-8.5) µm, (L = 8.5 µm; L’ = 8.5 µm; W = 7.3 µm; W’ = 7.3 µm; Q = (1.0-) 1.09 - 1.29 (-1.32); Q = 1.16; Q’ = 1.16), ??, thin-walled, smooth, amyloid, subglobose to broadly ellipsoid, infrequently globose or ellipsoid; apiculus ??; contents ??; white in deposit.
Subgregarious to gregarious. Terrestrial in fields and forests or in open grasslands far from trees.
Bas (1969): ARGENTINA: BUENOS AIRES—Santa Catalina, 27.xii.1965 R. Singer S620 (BAFC). TUCUMÁN—Pié del Periquillo, 30.xii.1951 R. Singer & H. Helberger T1672 (isotype; MICH).
BUENOS AIRES—La Plata - La Plata, Parq. Fac. Agronomía, 22.iv.1970 Lindquist & J. E. Wright s.n. (BAFC 30.603). Lomas de Zamora - LLavallol, Santa Catalina, 30.iii.1969 Isabel Mohadeb s.n. (BAFC "Cult.332"). San Isidro - Boulogne, Club Pueyrredón, cancha de Rugby, 24.iii.1993 Marcelo Cerdán s.n. [E. Albertó ED27] (BAFC 33.138); San Isidro, 3.iv.1980 John Christie s.n. [J. C. Paz 234] (BAFC). Unkn. Partido - Santa Catalina, 27.xii.1965 R. Singer S620 (BAFC n.v.).
TUCUMÁN—Pié del Periquillo, 30.xii.1951 R. Singer & Helberger [Singer] T1672 (holotype, LIL; isotype, MICH n.v.).
The holotype of this species is very poorly dried and very poorly preserved. A hyphomycete bearing plentiful conidia has invaded most of the hymenial surfaces. The remaining spores are mostly reduced to an amyloid rubble. Because the breadth is reduced in collapsed (but not squashed) spores, the values of W (7.3 µm) and Q (1.16) obtained from the holotype would be expected to be low and high respectively.
—R. E. Tulloss
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