| name | Amanita lindgreniana | ||||||||||||||||||||||||||||||||||||||||||||
| author | Tulloss | ||||||||||||||||||||||||||||||||||||||||||||
| name status | nomen provisorum | ||||||||||||||||||||||||||||||||||||||||||||
| english name | "Lindgren's Ringless Amanita" | ||||||||||||||||||||||||||||||||||||||||||||
| etymology |
Lindgren + -iana, possessed by, belonging to In honor of my longtime colleague and friend, Janet E. Lindgren. | ||||||||||||||||||||||||||||||||||||||||||||
| GenBank nos. |
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Showing 1 to 7 of 7 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 material is based on molecular research of Dr. L. V. Kudzma and other original research of R. E. Tulloss. Basidiome medium-sized with proportionately short stipe. | ||||||||||||||||||||||||||||||||||||||||||||
| pileus | 60 - 79 mm wide, fuligneous over disc and pale grayish brown toward margin or entirely dark brown, sometimes with scattered depigmented spots; convex to planar to planoconcave, becoming depressed over disc, tacky when moist; context not recorded; margin nonappendiculate, striate (0.25-0.35R); universal veil often absent, infrequently present as small patches or flat warts, whitish at first, becoming orangish brown with exposure and drying. | ||||||||||||||||||||||||||||||||||||||||||||
| lamellae | free with decurrent line on upper stipe, crowded, whitish in mass, whitish to buff in side view, drying slightly orangish yellow-tan, sometimes with dark pigmented edge near pileus margin, otherwise with pallid minutely fimbriate edge, with pileus under surface between lamellae drying pale orangish cream; lamellulae truncate to rounded truncate to subattenuate, predominately with lengths between one-quarter and one-half of pileus radius, infrequently extremely short, unevenly distributed between pairs of otherwise adjacent lamellae. | ||||||||||||||||||||||||||||||||||||||||||||
| stipe | Up to 123 × 17 mm long, narrowing upward; context sometimes partially hollow; universal veil as saccate membranous volva, whitish on inner and outer surfaces, with upper edge of sac becoming rust brown or orangish brown with age and drying. | ||||||||||||||||||||||||||||||||||||||||||||
| odor/taste | Not recorded. | ||||||||||||||||||||||||||||||||||||||||||||
| macrochemical tests |
None recorded. | ||||||||||||||||||||||||||||||||||||||||||||
| basidia | 4-sterigmate. | ||||||||||||||||||||||||||||||||||||||||||||
| partial veil | absent. | ||||||||||||||||||||||||||||||||||||||||||||
| lamella edge tissue | sterile. | ||||||||||||||||||||||||||||||||||||||||||||
| basidiospores | [40/2/1] (10.2-) 10.6 - 15.1 (-16.9) × (8.5-) 8.7 - 11.2 (-12.0) μm, (L = 12.2 - 12.5 μm; W = 9.8 - 10.0 μm; Q = (1.09-) 1.13 - 1.42 (-1.54); Q = 1.24 - 1.25), hyaline, colorless, smooth, thin-walled, inamyloid, subglobose to broadly ellipsoid to ellipsoid, with immature spores often elongate to cylindric or bacilliform or clavate or constricted or sigmoid or gourd-shaped or otherwise of uneven outline, with scattered giant spores present on both immature and mature lamellae; apiculus sublateral, subcylindric to cylindric; contents monoguttulate with additional small granules; white in deposit. | ||||||||||||||||||||||||||||||||||||||||||||
| ecology | California: In woods including Pinus radiata, Quercus agrifolia, Cupressus macrocarpa and introduced Eucalyptus. Montana: Scattered. In grassy area ca. Picea engelmannii & Pseudotsuga menziesii. Washington: In small groups. At ca. 1200 m elev. In clearings by lake with Tsuga and Picea. | ||||||||||||||||||||||||||||||||||||||||||||
| material examined | U.S.A.: CALIFORNIA—Alameda Co. - Berkeley, Strawberry Canyon [37.8740° N/ 122.239° W, 218 m], 17.i.2018 Ben Anderson s.n. [mushroomobserver #306749] (RET 822-4, nrITS-LSU seq'd.). Del Norte Co. - Tolowa Dunes St. Pk. [41.8542° N/ 124.2116° W, 7 m], 4.xii.2018 Ron Pastorino 12-4-18D [mushroomobserver #349767] (RET 861-1, nrITS & nrLSU seq'd.). MONTANA—Gallatin Co. - New World Gulch, 9.vii.2012 Ed Barge 0095 [mushroomobserver #99957] (RET 503-8, nrITS-LSU seq'd.). WASHINGTON—Pend Oreille Co. - Metalene Falls, 23.v.1996 PNW Key Council member s.n. [Janet E. Lindgren 96-06] (RET 279-7, nrLSU seq'd.). Skamania Co. - GPNF, Big Mosquito Lk. [46.128° N/ 121.758° W, 1189 m], 11.viii.2013 Sava Krstic SAK-2013-0811-3 [mushroomobserver #142399] (RET 573-1, nrITS & nrLSU seq'd.). | ||||||||||||||||||||||||||||||||||||||||||||
| discussion |
There are four specimens in Krstic SAK-2013-0811-3.
These were labeled A through D by RET. Much of the
lamella surface in the section reviewed of basidiome "A"
was immature. The hymenial surface of basidome "b"
was mature. Spore shape was highly irregular and
highly variable in both specimens as noted above in the
"basidiospores" data field. It is very unusual (but
not unknown) for spores of an Amanita to be
more
elongate (have higher Q value) in the
immature condition
than in the mature condition. High variation in
shape may be an indication of influence of an
environmental factor on the normally rather regular
process of Amanita spore production. For
example, the irregularly shaped spores in the
holotype
collection of A. lactea were not found in other
collections of that species. In the present case,
further examination
of additional basidiomes is necessary. In the material examined molecularly, we failed to obtain data in a region between the ?? and ?? primer sites in the nrLSU gene. in an alignment of our two complete fragments with a randomly selected group of other sequences from taxa of section Vaginatae sharing the "TTTGACCTCAAATCA" 5' motif for nrLSU, we found the gap region to be around 180 character positions long. This taxon was previously called "Amanita sp-WA03" in these pages. | ||||||||||||||||||||||||||||||||||||||||||||
| citations | —R. E. Tulloss | ||||||||||||||||||||||||||||||||||||||||||||
| editors | RET | ||||||||||||||||||||||||||||||||||||||||||||
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| name | Amanita lindgreniana |
| name status | nomen provisorum |
| author | Tulloss |
| english name | "Lindgren's Ringless Amanita" |
| images |
  1. Amanita sp-WA03, Big Mosquito Lk., GPNF, Skamania Co., Washington, U.S.A. (RET 573-1) |
| photo |
Sava Krstic - Big Mosquito Lake, Gifford Pinchot National Forest, Skamania County, Washington, U.S.A. [Note: This photograph in its original size is to be found at mushroomobserver.org.] banders - (2-3) Strawberry Canyon, Berkeley, Alameda Co., California, U.S.A.; (RET 822-4) [Note: Untrimmed and unedited images may be found at mushroomobserver.org/306749] Ron Pastorino - (4) Tolowa Dunes State Park, Del Norte Co., California, U.S.A.; (RET 861-1) [Note: Untrimmed and unedited images may be found at mushroomobserver.org/349767] |
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.
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