name | Amanita sp-T22 | ||||||||
name status | cryptonomen temporarium | ||||||||
GenBank nos. |
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intro | |||||||||
pileus | 13 - 24 mm wide, pale beige (slightly yellower than 10YR 8/4), unchanging , planoconvex, tacky, subshiny; context white except for narrow beige zone immediately below pileipellis, unchanging, up to 2.5 mm thick above stipe, narrowing evenly for half radius, then membranous to margin; margin striate (0.3-0.55R), nonappendiculate; universal veil as pale tan ("champagne"), apparently unchanging, minutely verruculose, detersile warts. | ||||||||
lamellae | free, lacking decurrent line on stipe, subcrowded, pale cream in mass, unchanging when cut or bruised, off-white in side view, up to 2- mm broad; lamellulae subtruncate to truncate, ??. | ||||||||
stipe | 28 - 41 × 1.5 - 2.5 mm, white to pale beige, becoming tan from handling, narrowing slightly upward, flaring slowly at apex, minutely fibrillose (10× lens), longitudinally striatulate; bulb subglobose, subabrupt, 3 - 6 × 4 - 7.5 mm; context white, unchanging, hollow, with central cylinder up to 0.5 mm wide, with larval tunnels not preent; exannulate; universal veil not evident. | ||||||||
basidiospores | [40/2/2] (7.5-) 8.0 - 10.0 (-10.8) × (5.2-) 5.8 - 7.0 (-7.2) µm, (L = 8.6 - 9.0 µm; L’ = 8.8 µm; W = 6.2 - 6.3 µm; W’ = 6.2 µm; Q = 1.26 - 1.50 (-1.54); Q = 1.38 - 1.44; Q' = 1.41), hyaline, colorless, smooth, thin-walled, inamyloid, broadly ellipsoid to ellipsoid, ??; apiculus sublateral, truncate-conic to cylindric; contents guttulate; color in deposit not recorded. | ||||||||
ecology | In sandy soil of river bottomland mixed forest of Pinus and broad-leaved trees. | ||||||||
material examined | U.S.A.: MISSISSIPPI—Perry Co. - Black Creek Wilderness Area, Cypress Creek Landing, 18.vii.1987 NAMA1987 participant s.n. [Tulloss 7-18-87-F] (RET 150-7), Alan Northrup s.n. [Tulloss 7-18-87-G] (RET 150-8). | ||||||||
discussion |
The following sporograph compares spore size and shape data from the present "taxon" with those of material currently classified as A. russuloides: While the color of the pileus and the exannulate stipe are somewhat reminiscent of A. crenulata, the spores of that species are dominantly subglobose to broadly ellipsoid in contrast to those of A. sp-T22. Of the numbered, provisional, gemmatoid taxa in eastern North America, the spore data from the collections included in A. sp-T22 are the closest match to the data of the Jenkins type study of A. russuloides. At present, pigmentation and size of the basidiome discourage us from mergining A. sp-T22 with our current description of the Peck species. | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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name | Amanita sp-T22 |
bottom links | [ Keys & Checklists ] |
name | Amanita sp-T22 |
bottom links | [ Keys & Checklists ] |
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.