name | Amanita gioiosa |
name status | nomen acceptum |
author | S. Curreli |
english name | "Pebbly Soil Amanita" |
images | |
cap |
The description is predominantly based on the two papers of Curreli (1990, 2000). The cap of A. gioiosa is (60-) 70 - 100 (-140) mm wide, cream at the edge and progressively becoming brown from the center outwards or entirely brown or, in several examples, ash-gray, darkest in the center, globose at first, becoming hemispherical to convex, finally depressed in the center in mature material, often marked with random and shallow indentations, and having a short-striate margin. The form of the cap is often irregular. The cap skin is easily peeled. The cap is covered with shallow, farinose warts, at first whitish, cream-white, and easily removed in humid conditions. The flesh is white and firm. |
gills |
The gills are free, whitish to white-cream at maturity, fairly thick, with a serrate edge. Short gills are present. |
stem |
The stem is (60-) 70 - 120 (-160) × 15 - 20 mm [length apparently includes length of bulb], expanded at the top, white, smooth, with a bulbous base. The bulb is radicating. The stem has an elliptical cross-section. At maturity, the stipe's ring can take the form of a belt and is not very evident. In many examples, the ring is absent at maturity (see below). The volva is only present at the base of the stem as a narrow limb at the top of the bulb. [Note: This information about the volva is our interpretation based on dried specimens and illustrations of Curreli (1990, 2000) and Neville and Poumarat (2004).] The flesh is white, compact, stuffed at maturity. |
spores |
According to the original description, the spores of A. gioiosa measure (8-) 9 - 11 (-12) × (6-) 7 - 7.7 (-8) µm and are broadly ellipsoid to ellipsoid and inamyloid. Neville and Poumarat (2004) report that the spores measure 8 - 11.5 (-13) x (5.5-) 6 - 8.5 (-9.5) µm and are broadly ellipsoid to ellipsoid (occasionally elongate) and inamyloid. Spores measured by RET (Sardinian material courtesy Dr. M. Contu) are as follows: (8.0-) 8.9 - 11.5 (-13.4) × (6.5-) 7.0- 9.0 (-9.5) µm and are broadly ellipsoid to ellipsoid and inamyloid. Clamps are common at bases of basidia. |
discussion |
The present species occurs in large groups, sometimes in groups with the bases growing together, or solitarily, in wooded areas with Eucalyptus and an under story of Cistus on pebbly, sandy sand and also in diverse, mixed forests with the presence of broad-leaved trees. The species was originally described from Sardinia, Italy. Neville and Poumarat state that it is more widespread around the Mediterranean and indicate association with Arbutus, chestnut (Castanea), oak (Quercus), and pine (Pinus). This species could have been introduced with Eucalyptus or could be a native Mediterranean species that is actually growing with Cistus, rather than Eucalyptus. The belt-like ring is placed rather low on the stem, but is apparently not the analogue of the rings on the base of the stem in species belongs in the group with Amanita muscaria (L. : Fr.) Lam.. One of the illustrations of the present species included by Neville and Poumarat (2004) shows that the ring originally connects the stipe to the cap margin and that, at that time, it is membranous and of rather small radius. [ Return to description of stem. ] The reader should compare the present species with Amanita heterochroma S. Curreli since they both appear in the same habitat. The best available description is that of Neville and Poumarat (2004).—R. E. Tulloss and L. Possiel Photos courtesy of Dr. S. Curreli (Sardinia, Italy) |
brief editors | RET |
name | Amanita gioiosa | ||||||||
author | S. Curreli ex S. Curreli. 1991a. Micol. Ital. 20(1): 51. | ||||||||
name status | nomen acceptum | ||||||||
english name | "Pebbly Soil Amanita" | ||||||||
synonyms |
≡Amanita gioiosa S. Curreli nom. inval. 1990. Micol. Ital. 19(1): 25. [Location of deposit of holotype not given. ICBN §37.5] The editors of this site owe a great debt to Dr. Cornelis Bas whose famous cigar box files of Amanita nomenclatural information gathered over three or more decades were made available to RET for computerization and make up the lion's share of the nomenclatural information presented on this site. | ||||||||
MycoBank nos. | 129120, 132089 | ||||||||
GenBank nos. |
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holotypes | in herb. Gruppo Micologico Zonale San Gavino | ||||||||
revisions |
Neville and Poumarat. 2002 ["2001"]. Bull. Trimestriel Soc. Mycol. France 117(4): 286. Neville and Poumarat. 2004. Fungi Europaei 9: 292, fig. 47, phot. 16A-C, pl. 15-16. | ||||||||
selected illustrations |
S. Curreli. 2000. Boll. Gruppo Micol. G. Bresadola 43(2): 89. Lavorato. 2000. ibid.: 122. | ||||||||
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 material is derived from the protolog of the present species and from original research of R. E. Tulloss. | ||||||||
subhymenium | RET: cellular; with 1-2 layers of inflated cells (subglobose to ellipsoid to broadly subfusiform) below bases of longest basidia. | ||||||||
basidia | RET: 40 - 55 × 9.5 - 12.0 μm, 4-sterigmate, thin-walled, with sterigmata up to ? μm; clamps rather common, easily visible without staining. | ||||||||
basidiospores |
from protolog: [-/-/-] (8-) 9 - 11 (-12) × (6-) 7 - 7.7 (-8) μm, (est. Q = 1.29 - 1.43), hyaline, cyanophilic, with wall thickened ("a parete ispessita"), inamyloid, broadly ellipsoid to ellipsoid; apiculus distinct; context guttulate; white in deposit. RET: [100/5/1] (8.0-) 8.9 - 11.5 (-13.4) × (6.5-) 7.0 - 9.0 (-9.5) µm, (L = 9.9 - 10.6 µm; L’ = 10.2 µm; W = 7.6 - 7.9 µm; W’ = 7.8 µm; Q = (1.18-) 1.21 - 1.43 (-1.74); Q = 1.29 - 1.36; Q’ = 1.32), hyaline, colorless, smooth, thin-walled, inamyloid, broadly ellipsoid to ellipsoid, infrequently elongate, adaxially flattened; apiculus sublateral, prominent, subcylindric to truncate-subconic; contents monoguttulate with additional small granules; white in deposit. | ||||||||
ecology |
from protolog: Gregarious, in masses, cespitose. In planted Eucalyptus camaldulensis forest with occasional Cistus monspeliensis and in mixed forest. In sandy soil or even gravelly/stony terrain. RET: Gregarious. Italy: under Castanea or under Pinus. | ||||||||
material examined |
from protolog: ITALY: SARDINIA—Unkn. Prov. - unkn. loc., 7.xii.1988 S. Curreli 123 (holotype, in herb. S. Curreli). RET: ITALY: SARDINIA—Prov. Sassari - Rena Majore, 19.i.1999 Dr. Marco Contu s.n. (in herb. M. Contu; RET 294-4). | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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