Amanita sarahae

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name

Amanita sarahae

author

Tulloss and S. D. Russell

name status

nomen provisorum

english name

"Sarah Tulloss' Ringless Amanita"

etymology

To honor the memory of Sarah Elizabeth King Tulloss (1990-2011).

GenBank nos.

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accession	locus	voucher	source
MW538975	nrITS-LSU	30.viii.1997 Carly De Gasperis, Michaela Slavid & S. E. K. Tulloss s.n. [Tulloss 8-30-97-F] (RET 268-9)	S. D. Russell, Marion, IN
MN820545	nrITS-LSU	23.ix.2000 Connie Borodenko s.n. (RET 319-5)	S. D. Russell, Marion, IN

intro

The following text may make multiple use of each data field.

The field may contain magenta text presenting data from a type study and/or revision of other original material cited in the protolog of the present taxon. Macroscopic descriptions in magenta are a combination of data from the protolog and additional observations made on the exiccata during revision of the cited original material.

The same field may also contain black text, which is data from a revision of the present taxon (including non-type material and/or material not cited in the protolog). Paragraphs of black text will be labeled if further subdivision of this text is appropriate.

Olive text indicates a specimen that has not been thoroughly examined (for example, for microscopic details) and marks other places in the text where data is missing or uncertain.

The text is derived from molecular studies of Stephen D. Russell, and other original research by R. E. Tulloss.

pileus

68 mm wide, tan without fulvous tint (close to 5C5), with disc dark fulvous (as often seen in A. fulva), planar, umbonate, tacky; context white, with very minimal brown line under pileipellis in disc only, not changing with cutting or bruising, 5 mm thick above stipe, thinning evenly for three-quarters distance to margin, thence membranous; margin striate (0.35R), not appendiculate, often splitting deeply at maturity; universal veil absent.

lamellae

free, crowded, pale orangish cream in mass, pale cream in side view, unchanging when cut or bruised, 4 mm broad; lamellulae truncate, unevenly distributed, of diverse lengths, common, with some lamella-lamellula pairs giving appearance of forking because of lamella curving around lamellula.

stipe

134 × 13 mm, pale cream or faintly orangish cream, more orange and more sordid where handled, with rust to orange-brown staining where stipipellis is broken or where surface fibrils are crushed together, narrowing upward, slightly flaring at apex, faintly longitudinally striatulate, with longitudinally oriented fibrils densely placed and more strongly pigmented than ground; context white to off-white, not changing when cut or bruised, hollow, with 7 mm wide central cylinder lined with white cottony fibrils; exannulate; universal veil as saccate volva, white, staining when damaged like stipe surface, membranous, subtubular, with dry exterior, lacking the rusty orange staining common in A. amerifulva, ?? × ?? mm, distinct from stipe context and apparently separable from stipe context even below stipe base.

odor/taste

Odor indistinct. Taste not recorded.

macrochemical
tests

none reported.

lamella trama

bilateral, divergent; w_cs = 60 - 65 µm (fresh material); ??; subhymenial base ??; filamentous, undifferentiated hyphae ?? µm wide, ??, with septa markedly constricted both in divergent elements of subhymenial base and in central stratum, with occasional segment reaching from close to central stratum to one cell away from basidial base; inflated cells apparently all intercalary; vascular hyphae ?? µm wide, ??.

subhymenium

w_st-near = 110 - 130 µm (fresh material); w_st-far = 140 - 145 µm (fresh material); comprising 1 - 3 (-4) cells between subhymenial base and base of longest basidia, having branching structure very apparent despite plenitude of inflated cells, with basidia arising predominantly from globose to subglobose inflated cells and occasionally from cells of other shapes or uninflated or slightly inflated short hyphal segments.

basidia

69 - 89 × 16.0 - 21 µm, 4-sterigmate, with sterigmata up to 5.5 × 3.0 µm; clamps rare or absent.

partial veil

absent.

lamella edge tissue

sterile.

basidiospores

send to graphing tool

[24/1/1] (10.5-) 12.0 - 14.0 (-15.5) × (9.6-) 10.8 - 13.5 (-14.5) µm, (L = 13.2 µm; L’ = 13.2 µm; W = 12.3 µm; W’ = 12.3 µm; Q = 1.04 - 1.11 (-1.12); Q = 1.07; Q’ = 1.07), hyaline, colorless, thin-walled, smooth, inamyloid, globose to subglobose, adaxially flattened; apiculus sublateral, cylindric, with hemispheric tip; contents ??; color in deposit not recorded.

ecology

Solitary. Following a season with rains more intense than usual, many species appeared to have stopped producing basidiomes. In sandy loam. Trees not recorded.

material examined

U.S.A.: CONNECTICUT—Middlesex Co. - Portland Twp., Hurd St. Pk. [41°31'23" N/ 72°32'25" W, 15-125 m], 23.ix.2000 Connie Borodenko s.n. [Tulloss 9-23-00-B] (RET 319-5, nrITS & nrLSU seq'd.) Tolland Co. - Hebron, The Hemlocks Nature Educ. Ctr. [41°37’11” N/ 72°23’22” W, 145-160 m], 30.viii.1997 Carly De Gasperis, Michaela Slavid & S. E. K. Tulloss s.n. [Tulloss 8-30-97-F] (RET 268-9, nrITS seq'd.). PENNSYLVANIA—Luzerne Co. - Rickett's Glen St. Pk. [41º18’12” N/ 75º35’09” W, 520m],13.viii.2013 David Wasilewski s.n. [mushsroomobserver #142745] (RET 570-80 nrITS-LSU seq'd.).

discussion

The present species was formerly known as Amanita sp-N46 in these pages.

citations

—R. E. Tulloss

editors

RET

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name	Amanita sarahae
name status	nomen provisorum
author	Tulloss & S. D. Russell
english name	"Sarah Tulloss' Ringless Amanita"
images	1. Amanita sarahae, Hickory Run St. Pk., Carbon Co., Pennsylavnia, U.S.A. (RET 569-7)
photo	David Wasilewski - (1) Hickory Run State Park, Carbon County, Pennsylvania, U.S.A. (RET 569-7) [Note: The unedited and untrimmed version of this image is available here.—ed.]

Sporograph Form T.B.D.