name | Amanita eburnea |
name status | nomen acceptum |
author | Tulloss |
english name | "Ivory's Destroying Angel" |
images | |
intro | This description is derived from the original description of A. eburnea (Tulloss 1989a). |
cap |
The cap of Amanita eburnea is 70 - 90 mm wide, white to smoke-gray, dry, globose at first, then broadly campanulate, then plano-convex to planar. The margin is nonappendiculate and nonstriate. The skin was described as "papery" by the original collector, Dr. Michael Ivory. The flesh is white. |
gills |
The gills are free, white, up to 6 mm broad. |
stem |
The stem is 45 - 110 × 10 - 18 mm, white to pale gray, cylindric, decorated with longitudinal striations, stuffed to solid. The flesh is white, firm to spongy. The ring is white to buff, superior to subapical, membranous to submembranous, persistent or left in patches over the gill edges or collapsing and sliding down the stem. The basal bulb slender, rounded or pointed below, approximately 25± mm long. The volva is membranous, white to buff, appressed to the base, limbate, with the top of the longest limb reaching 45± mm from the base of the bulb, with limb free for up to 15± mm. |
odor/taste | The odor is unpleasant with age. This species should be assumed to be deadly POISONOUS. |
spores |
The spores measure (7.0-) 8.0 - 11.0 (-12.0) × (4.8-) 5.2 - 6.5 (-7.5) µm and are ellipsoid to elongate (infrequently broadly ellipsoid, infrequently cylindric) and amyloid. Clamps are absent at bases of basidia. |
discussion |
The species is originally described based on collections of Dr. M. H. Ivory from Honduras and Belize. It is solitary to gregarious in troops under pine in grass on well-drained, loamy soil or in bushy forests over poorly drained sandy soil. The reader may wish to compare this species to Amanita elliptosperma G.F. Atk. Amanita eburnea is distinct from the A. elliptosperma "group" by the smoke-gray tint of the cap, the spores often dominantly elongate rather than ellipsoid, and having a universal veil which contains many more inflated cells. The ring is also weaker in A. eburnea due to more plentiful inflated cells. The reader may want to examine the recently revised key to the taxa of sect. Phalloideae in North America.—R. E. Tulloss |
brief editors | RET |
name | Amanita eburnea | ||||||||
author | Tulloss. 1989. Mycotaxon 36: 1, figs. 1-4. | ||||||||
name status | nomen acceptum | ||||||||
english name | "Ivory's Destroying Angel" | ||||||||
etymology |
eburneus (ivory) Both for the color of the fungus and as a pun on the name of the collector, Dr. M. H. Ivory. | ||||||||
MycoBank nos. | 126303 | ||||||||
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 | K; isotype in herb. M. H. Ivory. | ||||||||
revisions | Tulloss, here. | ||||||||
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 not directly from the protolog of the present taxon and not cited as the work of Dr. Z. L. Yang or another researcher is based upon original research by R. E. Tulloss. | ||||||||
basidiospores | from protolog: [108/5/5] (7.0-) 8.0 - 11.0 (-12.0) × (4.8-) 5.2 - 6.5 (-7.5) µm, (L = 9.0 - 9.8 µm; L’ = 9.3 µm; W = 5.7 - 6.0; W’ = 5.9 µm; Q = (1.29-) 1.34 - 1.84 (-2.08); Q = 1.50 - 1.66; Q’ = 1.58), hyaline, colorless, smooth, thin-walled, amyloid, ellipsoid to elongate, rarely broadly ellipsoid or cylindric, sometimes swollen at one end, often slightly adaxially flattened; apiculus sublateral, cylindric; contents guttulate; white in deposit. | ||||||||
ecology | Solitary to gregarious in troops. Belize and Honduras: At 500 - 1100 m elev. Under Pinus oocarpa in grass on well-drained loamy soil or under P. caribaea in bushy forest over poorly drained sandy soil. | ||||||||
material examined |
BELIZE:
CAYO DISTR.—Mountain Pine Ridge For. Res., D'Silva [formerly Augustine] For. Stn., vi.1976 M. H. Ivory s/85 (K), | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
Information to support the viewer in reading the content of "technical" tabs can be found here.
name | Amanita eburnea |
bottom links |
[ Section Phalloideae page. ]
[ Amanita Studies home. ]
[ Keys & Checklists ] |
name | Amanita eburnea |
bottom links |
[ Section Phalloideae 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.