name | Amanita homolalittenii | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
author | Tulloss et al. nom. prov. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
name status | nomen provisorum | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
etymology | genitive of a Latinized compound name; hence, the amanita of Homola and Litten. In honor of two discoverers of original material—Drs. Richard Homola and Walter Litten. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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 material below is based on the field notes of Dr. Litten and original research by R. E. Tulloss and C. Rodríguez Caycedo. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
pileus | 52 - 88 mm wide, light cream (e.g., 2A2), cream or very pale pinkish- or orangish-white, or off-white, sometimes white at margin, becoming sordid yellowish cream or pallid grayish brown in age, broadly campanulate with deflexed margin, becoming planoconvex to nearly planar, tacky, glabrous, matte; context white, whiter than lamellae, unchanging when cut or bruised, 4.5 - 6.5 mm thick at stipe, thinning evenly for one half to two thirds of radius, then membranous to margin; margin striate (0.2R - 0.6R), nonappendiculate; universal veil absent. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
lamellae | free to narrowly adnate with a decurrent tooth (10× lens) or a line on the stipe apex (10× lens), subcrowded to crowded, cream or pale pinkish- or orangish-cream in mass, ??, ?with brown stains at mid-radius in side view , drying a lovely pale orange (as does, on occasion, the underside and striate region of the pileus), 6.5 - ?? mm broad, ?sometimes almost all with reverse forking for about 0.5 mm near stipe, sometimes with edges laciniate; lamellulae truncate, of varying length, unevenly distributed. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
stipe | 140 - 220 × 12-18 mm, entirely whitish or cream, often with orange pulverulence in upper half, sometimes dingy gray above saccate volva, browning on edge of wounds and from handling, sometimes with plentiful yellowish fibrils in upper half and yellowish fibrillose flakes in lower half; context white to off-white and somewhat water logged, unchanging when cut or bruised (with larva tunnels concolorous), hollow or partially stuffed with white cottony material, with central cylinder 3.5 - 6.5 mm wide; exannulate; universal veil as saccate volva, white, occasionally with some brown stains on exterior surface, membranous, leathery, free from stipe for considerably more than half distance from stipe base to highest point on limb, about 1± mm thick at midpoint between highest point of limb and point of attachment to stipe, with highest point on limb 49 - 51 mm from base of stipe, decaying with stipe base in wet terrain ("separating from stipe when collected" [Litten], "appearing to liquify on handling" [Litten]); limbus internus as a very small ridge just above point of attachment to stipe. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
odor/taste | Odorless. Taste not recorded. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
macrochemical tests |
none recorded. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
anatomical figures | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
basidiospores |
[20/1/1] 9.2 - 11.0 × (8.2-) 8.5 - 9.5 µm,
(L = 10.1 µm; W = 9.0 µm; Q = (1.02-)
1.06 - 1.20 (-1.22); Q = 1.12), smooth,
thin-walled, ??,
inamyloid,
globose to subglobose to broadly ellipsoid, rarely
ellipsoid, adaxially flattened; apiculus
sublateral, proportionately
small, cylindric; contents
??; white in
deposit. [40/2/2] (9.4-) 9.8 - 11.5 × (7.7-) 8.4 - 10.1 (-10.5) μm (L = 10.3 - 10.8 μm; L' = 10.6 μm; W = 9.2 μm; W' = 9.2 μm; Q = (1.03-) 1.04 - 1.25 (-1.31); Q = 1.12 - 1.17; Q' = 1.15). | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ecology | Solitary to subgregarious. Maine: In wet loam or in conifer duff in an open road through mixed woods. New York: At ca. 560 m elev. In moss over very dark, wet loam, in open, old growth forest with Acer, Fagus grandifolia, Betula, and Tsuga canadensis or in open, regrown, mixed woods including Acer, Betula, F. grandifolia, Picea, T. canadensis, Pinus resinosa, and P. strobus. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
material examined |
U.S.A.: MAINE—Cumberland
Co. - Standish, off Rte. 114, 27.vii.1998 Samuel S.
Ristich s.n. (RET 288-3, nrITS & nrLSU
seq'd.).
Hancock Co.
- Town of Lamoine, Marboro, Cemetery Rd., 11.vii.1976
Walter Litten L-715 (RET 002-2).
Kennebec Co. - Hallowell, Jamies Pond Wildlife Mgmt. Area,
9.viii.2014 Clement Ockay s.n. [Tulloss 8-9-14-J]
(RET 628-7, nrITS & nrLSU seq'd.).
Penobscot Co. - Orono, Univ. of Maine, 10.viii.1991
participant NEMF1991 s.n. [Tulloss 8-10-91-B]
(RET 031-3, nrITS seq'd.); Greenfield, Passadumkeag
Mtn., 11.viii.1991 participant NEMF1991 s.n.
[Tulloss 8-11-91-F] (RET 029-8, nrITS seq'd.).
MARYLAND— Harford County - Little Gunpowder Falls Trail [39.476 N/76.4083 W, 69 m] 8.xiii.2019 Ryan Pridgeon s.n. [mushroomobserver.org #326528] (RET 859-2).
8.xiii.2018. [mushroomobserver.org #326515] (RET 859-8).
MASSACHUSETTS—Unkn. Co. - unkn. loc.
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discussion |
Amanita homolae is a very distinctive species with
its cream-colored cap tinted with pink or orange and a
stipe often decorated with pale orange
pulverulence. Genetic studies indicate that the number of white- to cream-capped species with a relatively persistent, saccate universal veil in Amanita section Vaginatae in northeastern North America are far more numerous than has been previously suspected. Due to recent efforts of members of the Quebec and Montreal mycological societies, the laboratory of Dr. Jean-Marc Moncalvo, and the authors of this page, the following white or pallid taxa (in additions to the present species) have been genetically segregated: A. albiceps, ??. At present, an additional 4?? probable taxa (including A. sp-NFL02) have been identified based on RET's herbarium collections which had been tentatively identified under one of the names listed above. Genetic work is being scheduled to compare this taxon with A. sp-NFL02. The present species has an nrLSU sequence that is identical to that of the morphologcically distinct A. sp-MO04. They differ slightly (but consistently to date) in their nrITS sequences—at ca. char. 30 in ITS2, A multi-G repeat is four characters long in A. sp-MO04 and 2 characters long in A. homolae. Other loci must be explored. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
citations | —R. E. Tulloss and L. V. Kudzma | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
editors | RET | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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name | Amanita homolalittenii |
bottom links | [ Keys & Checklists ] |
name | Amanita homolalittenii |
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.