name | Amanita sp-N19 |
name status | cryptonomen temporarium |
author | Tulloss |
intro | This provisional taxon was originally based on a collection from the northeastern U.S., and all collections that have been placed in it since have been from a region extending from Connecticut to New Hampshire. Collections attributed to another provisional taxon A. sp-S01 have been made in the same region, and the question arises as to whether an inappropriate distinction has been made. See also ?Amanita russuloides. |
cap | The cap of this species is 38 - 62 mm wide, yellowish with darker disc, tacky to viscid, and shiny. The striations on the cap margin extend to about 20 to 30% of the cap's radius. The cap often bears thin and narrow patches of white or whitish volva. |
gills | The gills are free to narrowly adnate, subcrowded to crowded, pale yellowish white to cream in mass, and white in side view. The short gills are truncate to rounded truncate. |
stem | The stuffed or solid stem of A. sp-N19 is 54 - 87 × 6 mm, white and may turn brown from handling. Its flesh is white and unchanging when cut or bruised. It bears a bulb that is 15 - 19 × 11 - 14 mm and is ovoid to ellipsoid. There is a small, whitish, membranous ring on the stem somewhere between mid-stem and about one-third of the stem's length from its top. The ring usually collapses on the stem or disappears completely. The white volva takes the form of a very narrow thin collar or a membranous flap of tissue arising from the bulb with the flap's upper tip up to 25 mm above the bottom of the bulb. |
odor/taste | The odor has been described as "fungoid" or lacking. |
spores | The spores of A. sp-N19 measure (8.8-) 9.5 - 11.5 (- 13.2) × (6.0-) 6.5 - 7.8 (-8.0) µm and are ellipsoid to elongate and inamyloid. Clamps are probably absent from bases of the basidia. |
discussion | On the taxon page for A. russuloides, the reader will find a brief discussion of the problem of the actual number of gemmatoid taxa in eastern North America.—R. E. Tulloss |
brief editors | RET |
name | Amanita sp-N19 | ||||||||
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 material is based on original research by R. E. Tulloss. | ||||||||
pileus | 38 - 62 mm wide, yellowish with darker disc, tacky to viscid, shiny; context white, brownish to somewhat yellowish in disc, 3 - 4 mm thick at stipe, thinning evenly for about 80% of radius, then a membrane; margin striate (0.2 - 0.35R), nonappendiculate; universal veil white, unchanging when cut or bruised, as thin and narrow patches, subfloccose to floccose to floccose-felted, detersile, sometimes absent. | ||||||||
lamellae | free to narrowly adnate, with or without decurrent line on stipe apex, subcrowded to crowded, pale yellowish white to cream in mass, white in side view, unchanging when cut or bruised, 3 - 5.5 mm broad; lamellulae truncate to rounded truncate, ??. | ||||||||
stipe | 54 - 87 × 6 mm, white, browning from handling, narrowing upward, flaring at apex, longitudinally striatulate, finely fibrillose below; context white, unchanging when cut or bruised, brownish in larva tunnels, solid or stuffed with white cottony material, with central cylinder 1.5± mm wide; bulb 15 - 19 × 11 - 14 mm, ovoid to ellipsoid; partial veil small, whitish, membranous, submedian or superior (then about one third of stipe length from apex), collapsing on stipe or ephemeral; universal veil in a very narrow thin collar or limbate, if limbate then tip of limb up to 25 mm from bottom of bulb, white. | ||||||||
odor/taste | Odor fungoid to lacking. Taste not recorded. | ||||||||
macrochemical tests |
none recorded. | ||||||||
basidia | 35 - 59 × 10.0 - 12.5 μm, ??, projecting up to 15.0 μm beyond surrounding basidioles; clamps ??. | ||||||||
basidiospores | [40/2/2] (8.8-) 9.5 - 11.5 (- 13.2) × (6.0-) 6.5 - 7.8 (-8.0) µm; L = 10.4 - 10.7 µm; L’ = 10.6 µm; W = 6.8 - 7.2 µm; W’ = 7.0 µm; Q = (1.31-) 1.38 - 1.72 (-1.83); Q = 1.48 - 1.53; Q’ = 1.50), thin-walled, smooth, hyaline, colorless, inamyloid, ellipsoid to elongate; apiculus sublateral, cylindrical to truncate conic; contents guttulate; ?? in deposit. | ||||||||
ecology | Solitary. New Hampshire: In sandy loam in northern hardwoods-hemlock forest (Tsuga canadensis dominant, with some Quercus). Rhode Island: In sandy soil under Pinus strobus. | ||||||||
material examined | U.S.A.: CONNECTICUT—New Haven Co. - Gilford, 19.ix.1998 William Yule s.n. [Tulloss 9-19-98-F] (RET 288-4). MASSACHUSETTS—Middlesex Co. - Stow, Stow Town For., 14.viii.1993 NEMF1993 participant s.n. [Tulloss 8-14-93-E] (RET 095-2). Worcester Co. - S of Leominster, Leominster St. For., 13.viii.1993 Brian Gottlieb s.n. [RET 8-13-93-C] (RET 095-5). NEW HAMPSHIRE—Cheshire Co. - Wantastiquet St. For., 19.viii.1989 Roger Phillips s.n. [Tulloss 8-19-89-F] (RET 022-7). RHODE ISLAND—Washington Co. - Kingston, Univ. of Rhode Island, campus, 4.viii.1988 NEMF1988 participant s.n. [Tulloss 8-4-88-C] (RET 239-5). | ||||||||
discussion | For comparisons with other taxa, see Amanita agglutinata and A. sp-S01. | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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