name | Amanita pseudoverna |
name status | nomen acceptum |
author | (Murrill) Murrill) |
english name | "False Springtime Destroying Angel no. 1" |
images | |
intro | The following is based on the original description of Murrill (1944), with the addition of my observations of the type. RET would like to make it clear at the outset that this species is very difficult to separate from A. elliptosperma. The possibility of synonymy is very real. |
cap | The cap of Amanita pseudoverna is 40 - 60 mm wide, convex to expanded, smooth, glabrous, rarely with volval patches, with an entire even margin. The cap is sometimes white, the center is sometimes cream. |
gills | The gills are adnexed, inserted, close, narrow, entire, brown when dry. |
stem | The stem is 80 - 120 × 10 - 15 mm, tapering upward, floccose, at times very rough. The bulb is large, ovoid, not radicate, about 40 × 30 - 40 mm. The volval limb is free, lobed or lacerate. The ring is very large, fixed 10 mm from the top of the stem, and persistent. |
odor/taste | Odorless. As a precautionary measure, this species should be considered deadly POISONOUS. |
spores | The spores of the type measure 9.0 - 10.8 (-12.0) × 6.2 - 8.0 (-8.2) µm and are ellipsoid, occasionally broadly ellipsoid, rarely subglobose and amyloid. Clamps are absent at bases of basidia. |
discussion |
This species was originally described from Florida where it was collected under oak. This is one of the taxa that is extremely close to Amanita elliptosperma G. F. Atk. and the name of which could well be placed in synonymy with the name of the latter. See the discussion of A. elliptosperma in the key to species of sect. Phalloideae in Central and North America.—R. E. Tulloss |
brief editors | RET |
name | Amanita pseudoverna | ||||||||
author | (Murrill) Murrill. 1944b. Proc. Fl. Acad. Sc. 7(2/3): 127. | ||||||||
name status | nomen acceptum | ||||||||
english name | "False Springtime Destroying Angel no. 1" | ||||||||
synonyms |
≡Venenarius pseudovernus Murrill. 1944b. Proc. Fl. Acad. Sc. 7(2/3): 114. 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. | 284070, 291951 | ||||||||
GenBank nos. |
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
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holotypes | FLAS F16413 | ||||||||
type studies |
Jenkins. 1979. Mycotaxon 10: 188. 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. | ||||||||
pileus | white, smooth; universal veil as "large patch." | ||||||||
lamellae | ?? | ||||||||
stipe | partial veil "enormous," 5 mm from stipe apex; bulb large; universal veil limbate | ||||||||
odor/taste | "No odor at all." | ||||||||
macrochemical tests |
none recorded. | ||||||||
pileipellis | ?? | ||||||||
pileus context | ?? | ||||||||
lamella trama | ?? | ||||||||
subhymenium | ?? | ||||||||
basidia | ?? | ||||||||
universal veil | ?? | ||||||||
stipe context | ?? | ||||||||
partial veil | ?? | ||||||||
lamella edge tissue | not described. | ||||||||
basidiospores | RET study of type: [40/2/1] 9.0 - 10.8 (-12.0) × 6.2 - 8.0 (-8.2) μm, (L = 9.8 μm; L' = 9.8 μm; W = 6.9 - 7.1 μm; W' = 7.0 μm; Q = (1.12-) 1.28 - 1.53 (-1.58); Q = 1.39 - 1.41; Q' = 1.40), hyaline, colorless, smooth, thin-walled, slightly amyloid, broadly ellipsoid to ellipsoid, infrequently subglobose; apiculus sublateral, cylindric; contents guttulate; ?? in deposit. | ||||||||
ecology | "Under oaks." | ||||||||
material examined |
from type study of Jenkins (1979):
U. S. A.: FLORIDA— Alachua Co. - Gainesville,
29.v.1938 W. A. Murrill F 16431 [(sic) 16413—ed.] (holotype, FLAS). U. S. A.: FLORIDA—Alachua Co. - Gainesville, 29.v.1938 W. A. Murrill F 16413 (holotype, FLAS). | ||||||||
discussion |
Spore data from the type study of Jenkins (1979) appears to be in error or record abnormal spores; because this creates a particularly odd sporograph, the data is presented here rather than in the basidiospores data field: [-/-/1]
7.8 - 8.6 (-10.2) × 7.0 - 7.8 μm, (Q = 1.11 - 1.31; Q' = 1.22),
hyaline, thin-walled, amyloid, subglobose to ellipsoid, often adaxially flattened; apiculus sublateral, truncate-conic; contents guttulate;
color in deposit not recorded. | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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name | Amanita pseudoverna |
bottom links | [ Keys & Checklists ] |
name | Amanita pseudoverna |
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.