name | Amanita farinosa sensu Thiers | ||||||||||||||||||||
author | sensu Thiers. 1982. Agaricales Calif. 1: 24. | ||||||||||||||||||||
name status | sensu | ||||||||||||||||||||
english name | "Western American Floury Amanita" | ||||||||||||||||||||
GenBank nos. |
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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 derived from the notes of collectors who supplied material for this page and from original research of RET. | ||||||||||||||||||||
pileus | 47 - 69 mm wide, usually uniformly gray, occasionally uniformly tan, never darker over disk, convex to broadly convex to planar, ??; context white, ??; margin barely striate in young material, becoming striate (ca. 0.1R, up to 0.5R in overmature material); universal veil as somewhat uneven powdery layer over entire pileus surface, uniformly gray, bound to pileipellis (??and context) by hyphal connections. | ||||||||||||||||||||
lamellae | narrowly adnate to adnate, close, white to whitish, sometimes with brownish stains, ??; lamellulae truncate, of diverse lengths, plentiful. | ||||||||||||||||||||
stipe | 55 - 70 × 10 - 18 mm (with length probably including bulb length), whitish, narrowing upward, minutely scaly; bulb usually clavate, only slightly wider than adjacent lower stipe (15 - 19 mm wide), subglobose to subclavate, sometimes compressed horizontally (slightly flattened); context white, hollow to stuffed; exannulate; universal veil as broken rings of friable, pallid, warts and patches on bulb and lower stipe. | ||||||||||||||||||||
odor/taste | Odor indistinct. Taste not recorded. | ||||||||||||||||||||
macrochemical tests |
none reported. | ||||||||||||||||||||
subhymenium | 45 - 65 µm wide, a branching structure of short uninflated hyphal segments, partially inflated cells, and plentiful inflated cells (up to ?? × ?? μm), with basidia arising from cells of all types. | ||||||||||||||||||||
basidiospores | [140/6/5] (6.5-) 7.5 – 9.5 (-10.6) × (5.0–) 5.5 – 7.2 (–7.6) µm, (L = 8.1 - 9.1 µm; L’ = 8.5 µm; W = 6.1 - 6.6 µm; W’ = 6.4 µm; Q = (1.14–) 1.20 – 1.49 (–1.70); Q = 1.28 - 1.40; Q’ = 1.33), hyaline, colorless, smooth, thin-walled, inamyloid, broadly ellipsoid to ellipsoid, infrequently subglobose or elongate, usually adaxially flattened; apiculus sublateral, cylindric, proportionately rather robust; contents monoguttulate, sometimes with additional small granules; white in deposit. | ||||||||||||||||||||
ecology | In small groups. California: At 120± m. In forests with Picea sitchensis. Oregon: At 440± m elev. In small open area ca. Acer, Tsuga, & Pseudotsuga menziesii with dense ground cover including Oxalis. Washington: ??. | ||||||||||||||||||||
material examined |
U.S.A.: CALIFORNIA—Del
Norte Co. - Jedediah Smith Redwoods St. Pk., Howland
Hill Rd. [41°45.304' N/ 124°07.808' W, ca. 120 m],
18.xi.2008 Ronald L. Pastorino 11-18-08B (RET 426-9),
11-18-08F (RET 426-5, nrITS seq'd.), 20.x.2011 R. L. Pastorino
10-20-11A [mushroomobserver.org 80882]
(RET 493-3, nrITS seq'd.); Rellin Ridge Tr., E of Crescent City,
2.xi.2005 R. Pastorino s.n. (RET 585-2).
OREGON—Clatson Co. -
US Rte. 26, milepost 28.6, 50 m from Sunset Rest
Area [45.7959° N/123.4593° W, 438], 21.vii.2012
Sava Krstic s.n. [mushroomobserver.org #102406]
(RET 508-2, nrITS seq'd.).
Curry Co. - Winchuck Cmpgrd. [42.0190º N/
124.1065º W, 92 m], 26.v.2016 Ronald
Pastorino 5-26-16A [mushroomobserver
#239953]
(RET 739-8, nrITS seq'd.).
Lincoln Co. -
Lincoln City, 25.x.1987 coll. unkn. s.n. [J. E.
Lindgren 101] (in herb. J. E. Lindgren; RET 077-7);
unkn. loc., "along coast," 14.ix.1987 Maggie
Rogers s.n. [J. E. Lindgren 87-111]
(RET 258-7).
WASHINGTON—Skamania Co. - GPNF, Pacific
Crest Tr., Trout Crk., 22.ix.1990 J. E. Lindgren
90-44 (in herb. J. E. Lindgren; RET 077-8); Trout
Crk. N., 9.ix.1989 J. E. Lindgren 89-173 (RET
258-8); Trout Crk. S., 30.ix.1992 J. E. Lindgren
92-50 (RET 258-9). [Note: See Thiers 38416 (SFSU).] | ||||||||||||||||||||
discussion |
The basidiome of this western entity is two to three times the size of the true A. farinosa of eastern North America and Central America; and the length of the marginal striations on the pileus is relatively short in the western "farinosa"—indicating proportionately thicker flesh. As seen in the above comparison of sporographs, the spores are proportionately narrower in the western entity (but a larger sample should be checked). The western species has a lamella trama about 50% broader and a subhymenium three to four times broader than in the true A. farinosa. | ||||||||||||||||||||
citations | —R. E. Tulloss | ||||||||||||||||||||
editors | RET | ||||||||||||||||||||
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name | Amanita farinosa sensu Thiers |
name status | sensu |
english name | "Western American Floury Amanita" |
images |
1. Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A. 2. Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A. 3. Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A. 4. Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A. 5. Amanita farinosa sensu Thiers, Jedediah Smith Redwoods St. Pk., Del Norte Co., California, U.S.A. 6. Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2). 7. Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2). 8. Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2). 9. Amanita farinosa sensu Thiers, Clatson Co., Oregon, U.S.A. (RET 508-2). |
photo |
Ron Pastorino - (1-3) Jedediah Smith Redwoods State Park, Del Norte County, California, U.S.A. (RET 426-9). (4-5) same location (RET 493-3) [mushroomobserver.org 80882]. Sava Krstic - (6-9) Clatson County, Oregon, U.S.A. (RET 508-2) [mushroomobserver.org 102406]. |
name | Amanita farinosa sensu Thiers |
bottom links | [ Keys & Checklists ] |
name | Amanita farinosa sensu Thiers |
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.