name | Amanita avellaneosquamosa |
name status | nomen acceptum |
author | (S. Imai) S. Imai in Ito |
english name | "Smaller-Spored East Asian Amidella" |
images | |
intro | The following is based in part on the revision of this species by Yang (1997). |
cap | The fruiting bodies of A. avellaneosquamosa are small to medium-sized. Its cap is 40 - 80 mm wide, convex, then plano-convex. It is white, whitish to dirty white. Its margin is radially striate (with striations extending 15% to 30% of the cap radius), and appendiculate especially in young stages. The volval remnants on the cap are brownish to brown, patch-like to felty, and up to 2 mm thick. The context is white and unchanging in color. |
gills | The gills of this species are free, crowded, white to cream-colored when fresh, but often become grayish, gray-brown, brownish, or chocolate-brown when dried. The short gills are squarely cut-off or nearly so. |
stem | The stem is 70 - 120 mm long and subcylindric or slightly tapering upward, with the very top of the stem slightly expanded. The stem is 8 mm wide at the very top and 20 mm wide near the base. It is white to whitish, with white, powdery scales. Its flesh is white and unchanging. There is no basal bulb on the stem. The volva is saccate, membranous, rather firm, with a free limb 20 - 40 cm in height. The outer surface of the volva is dirty white, and the inner surface is white. The ring is fragile and easily broken; often, it is only visible as farinose squamules on the upper part of the stem. |
odor/taste | The odor is indistinct. |
spores | ZLY's data from spore measurements are (8.0-) 9.0 - 11.0 (-12.0) × 5.5 - 6.5 (-7.0) µm. The spores are mostly ellipsoid to elongate (a few are broadly ellipsoid or cylindric) and amyloid. Clamps are not found at the bases of basidia. |
discussion |
This species is known to occur in association with pine, fir, beech, and chinkapin.
The species was originally described from Japan. It is relatively common in many parts of China. In Asia, see also A. clarisquamosa (S. Imai) S. Imai in E.-J. Gilbert, and A. duplex Corner & Bas. Many references to A. volvata (Peck) Lloyd or A. peckiana Kauffman in the Asian literature refer to one or both of the two species originally named by Imai.—Z.-L. Yang |
brief editors | RET |
name | Amanita avellaneosquamosa | ||||||||||||||||
author | (S. Imai) S. Imai in Ito. 1959. Mycol. Fl. Jap. 2(5): 250. | ||||||||||||||||
name status | nomen acceptum | ||||||||||||||||
english name | "Smaller-Spored East Asian Amidella" | ||||||||||||||||
synonyms |
≡Amanitopsis avellaneosquamosa S. Imai. 1933. Bot. Mag. (Tokyo) 47: 430.
≡Amidella volvata f. avellaneosquamosa (S. Imai) E.-J. Gilbert. 1940. Iconogr. Mycol. (Milan) 27, suppl. (1): 77, tab. 27 (figs. 2-3).
≡Amanita volvata f. avellaneosquamosa (S. Imai) E.-J. Gilbert. 1941. Iconogr. Mycol. (Milan) 27, suppl. (2): 304, tab. 34. 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. | 508023, 258006, 345960, 345970 | ||||||||||||||||
GenBank nos. |
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
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lectotypes | in herb. S. Imai (SAP); isolectotype in herb. E.-J. Gilbert (lost) | ||||||||||||||||
lectotypifications | E.-J. Gilbert. 1940. Iconogr. Mycol (Milan) 27, suppl.: 134 (in caption of fig. 3). | ||||||||||||||||
revisions |
Z. L. Yang. 1997. Biblioth. Mycol. 170: 126, figs. 104-107. Z. L. Yang & Y. Doi. 1999. Bull. Natl. Sci. Mus. Tokyo B 25(3): 116. | ||||||||||||||||
selected illustrations | Illus.: E.-J. Gilbert. 1941. Iconogr. Mycol (Milan) 27, suppl.: 304, tab. 34. | ||||||||||||||||
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. NOTE: Spore measurements from papers by Z. L. Yang use his "Times New Roman" face for "Q" and "Q'"—respectively, " | ||||||||||||||||
basidia | ??; clamps lacking. | ||||||||||||||||
basidiospores |
from the revision of Yang (1997): [110/4/2] (8.0-) 9.0 - 11.0 (-12.0) × 5.5 - 6.5 (-7.0) μm, ( from the revision of Yang & Doi (1999): [20/1/1] 8.5 - 10.5 (-11.0) × (4.5-) 5.0 - 5.5 (-6.0) μm, ( from Yang (2000): [25/1/1] (7.0-) 7.5 - 10.0 (-10.5) × 5.0 - 5.5 (-6.0) μm, ( from the revision of Yang et al. (2001): [40/2/1] (8.0-) 8.5 - 10.5 (-12.5) × (5.0-) 5.5 - 7.0 (-7.5) μm, ( composite of all spore data collected by RET: [125/5/5] (5.8-) 7.0 - 10.5 (-11.8) × (4.0-) 4.8 - 6.5 (-7.8) μm, (L = 7.7 - 10.0 μm; L' = 9.0 μm; W = 5.0 - 6.1 μm; W' = 5.6 μ:m: Q = (1.28-) 1.38 - 1.91 (-2.0); Q = 1.48 - 1.71; Q' = 1.61 ± 0.16), hyaline, colorless, smooth, thin-walled, faintly amyloid to amyloid, ellipsoid to elongate, infrequently cylindric, rarely broadly ellipsoid, sometimes slightly expanded at one end, sometimes constricted, ??; apiculus sublateral, cylindric, proportionately small; contents monoguttulate to granular; white in deposit. | ||||||||||||||||
ecology | Solitary. China: On ground in forest. India: At ca. 1900 m elev. in Quercus incana-Rhododendron arboreum forest with scattered Cedrus deodara. Japan: At ca. 300 m elev. On ground in Quercus forest or in mixed evergreen forest with Castanopsis and some Pinus and Abies. | ||||||||||||||||
material examined |
from Yang (1997):
CHINA: YUNNAN—Yulong Nakhi Autonomous Co. - Lijiang (prefecture level) City, Yulongshan [2900 m], 31.vii.1995 Z. L. Yang 2106 (HKAS 29500); Lijiang (prefecture level) City, Yulongshan [3000 m], 14.ix.1993 Y. Doi s.n. (HKAS 26623). from Yang & Doi (1999): JAPAN: HONSHU—Tokyo Metropolis (Pref.) - Oume City, Kurosawa 3-Chôme, along right-side ridge of Kurosawa-gawa R., 25.ix.1997 Y. Doi s.n. (TNS F-237935). from Yang (2000): CHINA: JIANGSU—Nanjing (sub-provincial) City - former city of Nanjing, Linggusi woods, 14.vii.1935 S. C. Li 112 (formerly "IBN 5814"; CUP-CH 922). Yang et al. (2001): CHINA: HAINAN—Changjiang Li Autonomous Co. - Bawangling, 23.viii.1988 Q. Chen s.n. (HMIGD 15018, as "A. phalloides var. striatula" in Bi et al. (1997)). Zhang et al. (2004) voucher for sequencing: CHINA: YUNNAN—unkn. loc., s.d. unkn. coll. s.n. (HKAS 38300). material revised by RET: CHINA: JIANGSU—Nanjing (sub-provincial) City - former city of Nanjing, Linggusi woods, 14.vii.1935 S. C. Li 112 (CUP-CH 922). INDIA: HIMACHAL PRADESH—Shimla Distr. - Narkanda, Hattoo Peak, 20.viii.1986 T. N. Lakhanpal & A. Kumar s.n. (HPUB 4430 n.v.; BPI 71990). UTTARAKHAND—Garhwal - Dehradun Distr., Mussoorie, 21.ix.1964 C. Bas 4442 (L); Pauri Distr., Dandapani, 8.viii.2001 K. C. Semwal & R. P. Bhatt 318 (GUH; RET 368-2). JAPAN: HONSHU—Chiba Prefecture - Kiyosumi, 25.viii.1983 C. Bas 9002 (L; RET 125-2). | ||||||||||||||||
discussion |
In the past, the present species and Amanita clarisquamosa were both confused with Amanita volvata, a North American species. The following figure compares the sporograph of the latter with the present taxon. The following figure compares the sporographs of the two Asian taxa—A. avellaneosquamosa and A. clarisquamosa. | ||||||||||||||||
citations | —R. E. Tulloss | ||||||||||||||||
editors | RET | ||||||||||||||||
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name | Amanita avellaneosquamosa |
bottom links | [ Keys & Checklists ] |
name | Amanita avellaneosquamosa |
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.