| name | Amanita americitrina | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| author | Tulloss, K. W. Hughes & Rodríguez Caycedo cryptonom. temp. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| name status | nomen provisorum | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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. Search:
Showing 1 to 17 of 17 entries | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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. The following morphological material not cited as the work of another researcher is based on original research of R. E. Tulloss. Phylogenetic analyses are due to (Hughes et al., to appear) and to continued original work in the laboratory of Dr. K. W. Hughes. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| pileus | 61 ± mm wide, pallid or citrine-yellow in spots and apparently overlain with deep grayish brown tint (and then virgate), with plentiful lavender developing on pallid surface after cold rain in December, hemispheric at first, then convex to broadly convex, tacky, subshiny; context white except for grayish brown below pileipellis, sometimes with watery line above lamellae, staining brown slightly when bruised, 4.5 ± mm thick over stipe, thinning evenly to margin; margin usually nonstriate, at times short striate, incurved at first, sometimes with short free margin; universal veil in submembranous, irregular small to medium-sized confluent warts or patches or squamules, appearing minutely roughened, from white to crust brown, liable to lavender staining like that of pileipellis. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| lamellae | free to narrowly adnate without decurrent line on stipe apex, ??, pale yellowish cream in mass, pale sordid cream in side view, browning in damaged areas, 6.5 ± mm broad, ??; lamellulae predominantly rounded truncate, among shortest some are subattenuate, ??. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| stipe | 59± × 15± mm, often rather robust, silver white above partial veil and white below at first, becoming lavender after cold winter rain, becoming brown from handling, narrowing upward and/or downward, below partial veil satiny and becoming longitudinally striatulate with minute fibrils in lower portion; bulb 23± × 33±, robust,soft, white at first, becoming lavender after cold winter rain, with thick short (5± mm high) marginal rim becoming grayish or ochraceous brown, sometimes with large longitudinal clefts; context white, staining pale red-brown in wounds, rusty brown in larva tunnels; partial veil superior, skirt-like, pale primrose yellow to nearly white at first, becoming grayish or gray and collapsing on stipe, and striate above, rather persistent; universal veil as raised and continous (or nearly so) marginal rim concolorous with bulb and changing color as noted for bulb. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| odor/taste | Odor faintly of "new" potatoes. Taste not recorded. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| macrochemical tests |
Spot test for tyrosinase (L-tyrosine): Apparently positive on pileus and stipe surfaces and at least somewhere in stipe context. [Note: The data is very old and was collected before RET adopted the graphical recording form of Dr. Curry Marr. The experiment should be repeated with 0.1% paracresol solution.—ed.] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| stipe context | longitudinally acrophysalidic: ??. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| lamella edge tissue | sterile; ??. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| basidiospores | composite of data from material revised by RET: [31/1/1] (6.0-) 7.5 - 9.5 (-9.6) × (5.4-) 7.0 - 9.0 (-9.1) μm, (L = 7.8 - 9.0 μm; L; = 8.6 μm; W = 7.3 - 8.3 μm; W' = 8.0 μm; Q = (1.02-) 1.04 - 1.14 (-1.15); Q = 1.08; Q' = 1.08), ??, ??, smooth, ??, ??, amyloid, globose to subglobose, at least slightly flattened adaxially; apiculus sublateral, ??; contents ??; white in deposit. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ecology | Solitary to scattered to subgregarious. New Jersey: At 34 m or more elev. In deep sand of Pinus-Quercus barrens or in loam under detritus in northern hardwood-Tsuga canadensis forest. South Carolina: In small group. At 208 m elev. In duff over dark loam of Pinus-Quercus woods. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| material examined |
U.S.A.:
FLORIDA—Putnam Co. - Welaka, Welaka St. For., Mud Springs Nature Trail [29°28’ N/ 81°39’W], 9.xii.1996 S. Sheine s.n. (RET 257-2), 10.xii.1996 Sandy Sheine s.n. (RET 257-1), 12.xii.1996 Sandy Sheine s.n. (RET 257-4, nrITS seq'd.).
MISSOURI—Ste. Genevieve Co. - Hawn St. Pk. [37.820° N/ 90.2429° W, 242 m], 14.x.2012 Patrick Harvey s.n. [mushroomobserver #113462] (RET 554-3, nrITS & nrLSU seq'd.).
NEW JERSEY—Burlington Co. - W of Chatsworth, Franklin Parker Preserver, by north | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| discussion |
The following figures provide sporograph comparisons
between the present species, the isotype of
A.
brunnescens var. straminea,
A.
cornelihybrida and A. lavendula: Hence, the spores of A. lavendula are apparently quite distinct from the spores of A. cornelihybrida, A. ameiricitrina, and A. brunnescens var. straminea. Amanita brunnescens var. straminea is probably synonymous with one of the other pair; however, the type of A. brunnescens var. straminea is old. We have not been able to extract useful DNA from it. Because the partial veil of this species turns gray like that of A. porphyria, here's a sporograph comparison of A. porphyria with the present species: On this site, this species was previously known as "A. sp-lavendula03." The material of RET 419-10 has proven to be juvenile with few mature spores. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| citations | Those working on this species acknowledge the support of the University of Tennessee, Knoxville, and National Science Foundation grant DEB 1144974.—R. E. Tulloss | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| editors | RET | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Information to support the viewer in reading the content of "technical" tabs can be found here.
| name | Amanita americitrina |
| name status | nomen provisorum |
| author | Tulloss, K. W. Hughes & Rodríguez Caycedo |
| images |
  1. 'Amanita sp-lavendula03,' Oneida Co., New York, USA. RET 484-7 |
| photo | Eric Smith (1) Oneida County, New York, U.S.A. [RET 484-7]. The original of this photograph and others of the same collection can be found here: mushroomobserver.org #52741. |
Spore data sets and their composite
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.
Text and User-Generated Sporographs are published under the Creative Commons License.
In the case of a taxon page, image credits are on the 'image' tab.