| name | Amanita sp-N40 | ||||||||||||||||||||
| author | Tulloss | ||||||||||||||||||||
| name status | cryptonomen temporarium | ||||||||||||||||||||
| GenBank nos. |
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| intro |
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 following text is based on original research of R. E. Tulloss. | ||||||||||||||||||||
| pileus | 44 - 50 mm wide, sometimes densely virgate, pale umbrinous brown to umbrinous brown, darkest near inner ends of striae, pallid over outer ends of striae, not changing when cut or bruised, ovoid at first, then campanulate with umbo, eventually convex with very slight umbo, tacky at first; context white, with or without gray region below pileipellis, with or without watery line at attachment of lamellae, 3 - 3.5 mm thick at stipe, narrowing evenly for about two-thirds of radius, then membranous to margin; margin striate (0.25 - 0.45R), nonappendiculate; universal veil absent. | ||||||||||||||||||||
| lamellae | free to receding with or without decurrent line on stipe apex, close, off-white to sordid cream to cream in mass, pale cream in side view, not changing when cut or bruised, 3 - 4.5 mm broad; lamellulae truncate to rounded truncate to subattenuate to attenuate, unevenly distributed, of diverse lengths, plentiful. | ||||||||||||||||||||
| stipe | 93 - 94 × 5.5 - 7.5 mm, white or very pallid gray ground color, sometimes becoming pale brownish (without handling), not changing when cut or bruised or taking on faint yellowish brown from handling, narrowing upward, flaring (but sometimes very slightly) at apex, bearing a white flocculence at first, then becoming satiny and finely longitudinally striatulate, sometimes becoming covered with pallid fibers (about the same as or paler than ground color); context white to off-white, sometimes with brown stain at very base of stipe, hollow, containing some white cottony fibrils in lower part or lined with such fibrils, with central cylinder 2.5 - 3 mm wide; exannulate; universal veil as saccate volva, leathery/membranous, tough, white on exterior with brownish edge, very pale brownish to pale brownish gray on inner surface, 23 - 30 × 13 - 16+ mm, 0.5 - 1.0 mm thick at midpoint between attachment and highest point of limb, appressed to stipe for about lower third of height, flaring above that point before becoming subcylindric once again, with white limbus internus several mm high to half height of free volval limb and rather robust at or just above point of attachment to stipe. | ||||||||||||||||||||
| odor/taste | Odor none to earthy. Taste not recorded. | ||||||||||||||||||||
| macrochemical tests |
none recorded. | ||||||||||||||||||||
| pileipellis | 140± µm thick, with a colorless extensively gelatinized layer 65 µm thick above a brown layer 85± µm thick; filamentous, undifferentiated hyphae ?? µm wide, ??, densely interwoven, subradially arranged; vascular hyphae ?? µm wide, ??. | ||||||||||||||||||||
| pileus context | filamentous, undifferentiated hyphae 2.5 - 14.5 µm wide, branching, loosely interwoven, plentiful, not in fascicles; acrophysalides clavate to fusiform, up to 93 × 34 µm or larger, thin-walled, plentiful; vascular hyphae ?? µm wide, sinuous. | ||||||||||||||||||||
| lamella trama | bilateral, divergent; with angle of divergence ??, with relatively large, ovoid to subglobose to clavate to elongate cells in subhymenial base (e.g., 29 × 23 µm and 38 × 21 µm) apparently all intercalary; wcs = ?? µm; filamentous, undifferentiated hyphae 2.5 - 6.8 µm wide, branching, with frequent intercalary inflated cells in central stratum (thin-walled, fusiform to clavate, up to 79 × 19.0 µm); terminal inflated cells not observed; vascular hyphae ?? µm wide, ??. | ||||||||||||||||||||
| subhymenium | wst-near = ?? µm; wst-far = ?? µm; a densely branching, interwoven structure of uninflated and partially inflated hyphal segments with locally common inflated cells interspersed, with basidia arising from cells of all types. | ||||||||||||||||||||
| basidia | 38 - 75 × 11.5 - 17.0 µm, with walls thin or up to 0.8 µm thick on the sides, 4-sterigmate; clamps not observed. | ||||||||||||||||||||
| basidiospores | [40/2/2] (10.0-) 10.2 - 13.2 (-13.8) × (9.2-) 9.5 - 12.5 (-13.2) µm, (L = 10.7 - 12.5 µm; L’ = 11.6?? µm; W = 10.1 - 11.9 µm; W’ = 1.06?? µm; Q = 1.02 - 1.09 (-1.11); Q = 1.05 - 1.06; Q’ = 1.05??), hyaline, colorless, thin-walled, smooth, ??inamyloid, globose to subglobose, often at least somewhat adaxially flattened; apiculus sublateral, often rather prominent, truncate-conic to cylindric; contents mono- to multiguttulate to granular; ?? in deposit. | ||||||||||||||||||||
| ecology | Solitary. Massachusetts: In litter and loam of dry, deciduous forest. West Virginia: In thin loan and litter over a jumble of rocks, in association with Acer, Betula lutea f., and Fagus grandifolia in mixed deciduous forest. | ||||||||||||||||||||
| material examined | U.S.A.: MASSACHUSETTS—Worcester Co. - Worcester, Broad Meadow Brook Wildlife Sanctuary, 13.viii.1993 “Annie” s.n. [Tulloss 8-13-93-B] (RET 095-7). WEST VIRGINIA—Tucker Co. - Canaan Valley St. Pk., Deer Run Tr., 3.viii.1992 R. E. Tulloss 8-3-92-E (RET 120-3). | ||||||||||||||||||||
| discussion |
The Massachusetts collection had larger spores and basidia with side walls up to 0.8 µm thick. The West Virginia collection had thin-walled basidia and the smaller average spores. See A. longicuneus. | ||||||||||||||||||||
| citations | —R. E. Tulloss | ||||||||||||||||||||
| editors | RET | ||||||||||||||||||||
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