| name | Amanita solaniolens |
| name status | nomen acceptum |
| author | H. L. Stewart & Grund |
| english name | "Old Potato Amanita" |
| images | |
| intro | The following is based on the original description by Stewart and Grund (1974) with some additional information from Jenkins (1986). |
| cap | The cap of Amanita solaniolens is 39 - 45 mm wide, dull-yellow to light blond at the margin, abruptly darkening to olive brown at the center, with a greenish tinge over the entire cap, broadly convex to plane, viscid when moist, fibrillose-silky, and with a nonstriate margin. The volva is present as one or two large, flat patches, and creamy white to yellowish white. The flesh is firm and white, except for a narrow creamy white region just under the cap skin. |
| gills | The gills are free, moderately close, creamy white to yellowish white, 4 - 5 mm broad, with a minutely floccose edge. The short gills are rounded truncate to subattenuate to attenuate, of diverse lengths, unevenly distributed, and common. |
| stem | The stem is 76 - 92 × 4 - 5 mm, nearly cylindric or narrowing upward, creamy white, staining slightly brownish when bruised, and undecorated except for a slightly fibrillose-silky region near the bulb. The stem is firmly stuffed to nearly hollow. According to the illustration in the original description, the bulb is subabrupt and has some longitudinal splitting as in Amanita brunnescens G. F. Atk. The ring is creamy white to pale yellow, attached near the top of the stem, skirt-like, membranous, and collapsing against the stem. The volva is present on the globose bulb as a narrow free margin and is yellowish white to creamy white and submembranous. |
| odor/taste | The odor is of old potatoes, and the taste is said to be very mild. |
| spores | According to the original description, the spores measure (6.6-) 7.2 - 9.0 µm long and are globose to subglobose and amyloid. Clamps are absent at bases of basidia. Jenkins (1986) reported spore measurements as follows: 6.1 - 9.2 × 6.6 - 9.0 µm. |
| discussion |
This species was originally described from Nova Scotia, Canada. It occurs solitarily under eastern hemlock (Tsuga canadensis). RET believes that he has collected this species in the United States north and east of West Virginia. The US material is macroscopically identical with the original description of A. solaniolens; and the holotype of the present species is presently on loan in our lab, but has not been fully revised. With this caveat we here supply the spore data from our collections which suggest a broader range of shape than is indicated by the original description: 7.0 - 8.8 (-10.5) × (5.5-) 6.5 - 8.0 (-9.5) µm, are globose to subglobose to broadly ellipsoid, rarely ellipsoid. For those persons familiar with RET's regional keys and the checklists produced at forays in the northeastern USA, previously collected material has been called "Amanita sp. N20" ("NE20" in Northeast Micological Foray checklists). We concur with the authors' choice of A. brunnescens as the species most similar to the present one. The former is distinguished by its size, its variable cap coloration, its lack of yellow pigment in the stem ring and volva, the more copious stem ring, and the strong brown staining reactions for which it is named.—R. E. Tulloss and L. Possiel |
| brief editors | RET |
| name | Amanita solaniolens | ||||||||
| author | H. L. Stewart & Grund. 1974. Canad. J. Bot. 52: 338, figs. 14-21, 27. | ||||||||
| name status | nomen acceptum | ||||||||
| english name | "Old Potato Amanita" | ||||||||
| etymology | Solanum, "potato" + olens, "smelling" | ||||||||
| MycoBank nos. | 308590 | ||||||||
| GenBank nos. |
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| holotypes | ACAD 10884 | ||||||||
| 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 following is derived from the protolog of the present species. | ||||||||
| pileus | from protolog: 39 - 45 mm wide, dull yellow (3B3) to light blond (4C3) at margin, abruptly darkening to olive brown (4E5 to 4F3) over disc, entirely with distinct greenish tinge, broadly convex to planar, fibrillose silky, viscid when moist; context white, creamy, "hard," 2.5 - 3 mm thick above stipe; margin nonstriate; universal veil as one or two flat proportionately large patches, creamy white to yellowish white (4A2). | ||||||||
| lamellae | from protolog: free, moderately close, creamy white to yellowish white (3A2), 4 - 5 mm broad, with edges sometimes slightly flocculose; lamellulae not described. | ||||||||
| stipe | from protolog: 76 - 92 × 4 - 5 mm, creamy white, cylindric or narrowing upward, glabrous, slightly fibrillose-silky near bulb, staining slightly brownish when bruised; context thickly stuffed to hollow; bulb proportionately small, subglobose, subabrupt [all per figure]; partial veil superior, pendent, creamy white to pale yellow (3A2), membranous, collapsing; universal veil as short limbate volva, creamy white, membranous. | ||||||||
| odor/taste | from protolog: Odor of old potatoes. Taste very mild. | ||||||||
| macrochemical tests |
none recorded. | ||||||||
| pileipellis | from protolog: ixocutis, 85 - 100 μm thick; filamentous hyphae 3 - 6 μm wide, branching, densely packed, occasionally bearing clavate terminal segment (up to 45 × 10 μm). | ||||||||
| pileus context | not described. | ||||||||
| lamella trama | from protolog: bilateral. | ||||||||
| subhymenium | not described. | ||||||||
| basidia | from protolog: (28-) 30 - 36 × (8.4-) 9.6 - 12.0 μm, 4-sterigmate; clamps not observed. | ||||||||
| universal veil | from protolog: On pileus: filamentous hyphae (3-) 5 - 8 (-12) μm wide, hyaline, branching, loosely interwoven; inflated cells plentiful, globose to subglobose to clavate, up to 60 × 20 μm and 76 × 76 μm, terminal. On stipe base: filamentous hyphae 3.5 - 5 μm wide, branching, thin-walled, interwoven, usually constricted at septa; inflated cells scattered, up to 70 × 36 μm, terminal. | ||||||||
| stipe context | from protolog: longitudinally acrophysalidic; filamentous hyphae 3 - 9 μm wide (near exterior surface 3 - 6 μm wide), thin-walled, branching, "usually" constricted at septa in central cylinder ("pith"); acrophysalides up to 210 × 30 μm, thin-walled, scattered and smaller in central cylinder ("pith"), also sometimes subglobose (up to 74 μm long) in pith; vascular hyphae noted in central cylinder ("pith"). | ||||||||
| partial veil | from protolog: filamentous hyphae (3-) 4 - 6 (-8) μm wide, branching, loosely interwoven; inflated cells not observed. | ||||||||
| lamella edge tissue | not described. | ||||||||
| basidiospores |
from protolog: (6.6-) 7.2 - 9.0 μm long, (Q = 1.0 - 1.1, "usually 1.0"), smooth, amyloid, globose to subglobose; apiculus not described; contents not described; white in deposit. [Note: Sporgraph cannot be generated.—ed.] RET (from material originally defining the concept of A. sp-N20): [70/3/3] 7.0 - 8.8 (-10.5) × (5.5-) 6.5 - 8.0 (-9.5) µm, (L = 7.9 - 8.2 µm; L’ = 8.0 µm; W = 7.1 - 7.4 µm; W’ = 7.2 µm; Q = (1.0-) 1.03 - 1.27 (-1.35); Q = 1.06 - 1.16; Q’ = 1.11), hyaline, colorless, smooth, thin-walled, amyloid, globose to subglobose to broadly ellipsoid, rarely ellipsoid, sometimes swollen at one end, adaxially flattened; apiculus sublateral, cylindric; contents monoguttlate to multiguttulate, sometimes with additional small granules; white in deposit. | ||||||||
| ecology | from protolog: Solitary. In humus under Tsuga canadensis or Acer. | ||||||||
| material examined | from protolog: CANADA: NOVA SCOTIA—Kings Co. - Aylesford, 29.vii.1967 H. L. Stewart 200 (holotype, ACAD 10884); Kentville Ravine, 31.vii.1967 unkn. coll. [H. L. Stewart 215] (paratype, ACAD 10898). | ||||||||
| discussion |
This species is assignable to Amanita [section Validae]—possibly to be included in stirps Brunnescens. The authors of the present taxon state that, except for spore measurements, microscopic characters were derived from examination only of the holotype. | ||||||||
| citations | —R. E. Tulloss | ||||||||
| editors | RET | ||||||||
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| name | Amanita solaniolens |
| bottom links |
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| name | Amanita solaniolens |
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[ Keys & Checklists ] |
Spore data sets and their composite
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.
Text and User-Generated Sporographs are published under the Creative Commons License.
All other images are © 2011, Rodham E. Tulloss unless otherwise indicated in context.
In the case of a taxon page, image credits are on the 'image' tab.