name | Amanita flavofloccosa |
name status | nomen acceptum |
author | Nagas. & Hongo |
english name | "East Asian Shaggy Yellow Lepidella" |
intro | The following is largely based on the original description by Nagasawa and Hongo (1984. It is noteworthy that, unlike other yellowish or yellowing species in Amanita sect. Lepidella (e.g., see Amanita subsolitaria (Murrill) Murrill), Amanita flavofloccosa is reported to have white, unchanging flesh. |
cap | The cap of A. flavofloccosa is 90 mm wide, dry or subviscid when wet, with an appendiculate, nonsulcate margin. At maturity, the pileus is subplanar with the margin curved downward. The cap is densely covered with delicate, lanose to floccose, or somewhat pulverulent, pale yellow to light yellow scales on a whitish ground. The volval scales become grayish red to brownish orange from the tip with age. |
gills | The gills are free, rather crowded, and pale orange. The short gills are abruptly[?] attenuate. |
stem | The stem is 170 × 10 mm, nearly cylindric, with a slightly enlarged base, stuffed, annulate, and lanose-squarrose on a whitish background. The small basal bulb is not decorated with remnants of volva. The annulus is striate on the top surface and, although tearing, is at least sometimes persistent. |
spores | The spores measure 7 - 8 (-9) × 6 - 8 µm and are amyloid and globose to subglobose (rarely broadly ellipsoid). Clamps are present at bases of basidia. |
discussion |
The present species was originally described from Japan. Amanita flavofloccosa is assignable to Bas' stirps Nauseosa. Somewhat similar taxa (but without clamps at the bases of basidia) can be found in Bas' stirps Thiersii.—R. E. Tulloss |
brief editors | RET |
name | Amanita flavofloccosa | ||||||||
author | Nagas. & Hongo. 1984. Trans. Mycol. Soc. Jap. 25: 367, figs. 1(a-f), 6. | ||||||||
name status | nomen acceptum | ||||||||
english name | "East Asian Shaggy Yellow Lepidella" | ||||||||
MycoBank nos. | 105033 | ||||||||
GenBank nos. |
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
These pages will eventually be made live, so try again later.
| ||||||||
holotypes | TMI | ||||||||
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 . | ||||||||
pileus | from protolog: 90 mm wide, nearly planar, dry or subviscid when wet; context white, up to 9 mm thick above stipe; margin nonsulcate, appendiculate with easily detached floccose material; universal veil as scales, lanose to floccose to somewhat pulverulent, pale yellow to light yellow (3A3-5), becoming grayish red (7B3-4) to brownish orange (6C4, 7C4-6) from tip with age. The reported "whitish ground" color of the pileus is probably the color of the context because most taxa in subsection Vittadiniae lack a pileipellis and have the universal veil connected to what appears to be a dense region of the pileus context.—ed.] | ||||||||
lamellae | from protolog: free,rather crowded, pale orange (5A3), up to 9 mm broad, with edge concolorous and entire; lamellulae abruptly[?] attenuate. | ||||||||
stipe | from protolog: 170 × 10 mm, subcylindric; bulb 15 mm wide, nearly glabrous or obscurely verrucose; context stuffed; partial veil subapical, pendent, felted-membranous, rather persistent, whitish, with yellow floccose edge, striate above; universal veil as lanose-squarrose material below partial veil, light yellow (3-4A4-5) in upper part, whitish in lower part . | ||||||||
odor/taste | from protolog: Odor strong and sickening. Taste mild. | ||||||||
macrochemical tests |
none recorded. | ||||||||
pileipellis | from protolog: as cutis; filamentous hyphae 5 - 7.5 (-10) μm wide; clamps present. | ||||||||
pileus context | not described | ||||||||
lamella trama | not described. | ||||||||
subhymenium | not described. | ||||||||
basidia | from protolog: 25 - 40 × 8 - 12.5 μm, 4-sterigmate; clamps present. | ||||||||
universal veil | from protolog: On pileus: inflated cells narrowly fusiform to ellipsoid to cylindric, mostly 55 - 200 × 12.5 - 30 μm, in readily dissociating chains. On stipe: similar to tissue on pileus except for more frequent filamentous hyphae 2.5 - 5 μm. | ||||||||
stipe context | not described. | ||||||||
partial veil | from protolog: hyphae [including both filamentous hyphae and inflated cells] 2.5 - 12.5 (-32.5) μm, "arranged parallel to each other, element cells not readily disjoining." | ||||||||
lamella edge tissue | from protolog: "not seen." | ||||||||
basidiospores |
from protolog: [-/1/1] 7 - 8
(-9) × 6 - 8 μm, (Q = 1.0 - 1.2 (-1.3)), hyaline,
thin-walled, smooth, amyloid, globose to subglobose
to broadly ellipsoid, infrequently ellipsoid;
apiculus sublateral, cylindric to
truncate-conic; contents monoguttulate; color
in deposit not recorded. Yang (2015): [-/-/-] 6.5 - 9 × 6 - 9 μm, amyloid, globose to subglobose, occasionally broadly ellipsoid, (Q = (1.0-) 1.04 - 1.15 (-1.25); Q = 1.09±0.06). | ||||||||
ecology | from protolog: Solitary. In Bamboo (Phyllostachys sp.) stand. | ||||||||
material examined | from protolog: JAPAN: KYUSHU—Fukuoka-ken - Fukuoka-shi, Shianoshima, 18.vii.1979 F. Nagasawa s.n. (holotype, TMI 7780). | ||||||||
discussion | The authors note that "this species is...apparently closely related to members of stirps Nauseosa...(Bas 1969)...." | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
Information to support the viewer in reading the content of "technical" tabs can be found here.
name | Amanita flavofloccosa |
bottom links |
[ Section Lepidella page. ] [ Amanita Studies home. ] [ Keys & Checklists ] |
name | Amanita flavofloccosa |
bottom links |
[ Section Lepidella page. ] [ Amanita Studies home. ] [ 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.