Amanita pubescens sensu Coker - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella

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name	Amanita pubescens sensu Coker
name status	sensu
english name	"Coker's Pubescent Amanita"
images	1. Amanita pubescens sensu Coker, photo by W. C. Coker of Coker 767, Chapel Hill, Orange Co., North Carolina, U.S.A. 2. Amanita pubescens sensu Coker, photo by W. C. Coker of Coker 767, Chapel Hill, Orange Co., North Carolina, U.S.A. 3. Amanita pubescens sensu Coker, photo by W. C. Coker of Coker 739, Chapel Hill, Orange Co., North Carolina, U.S.A. 4. Amanita pubescens sensu Coker, photo by W. C. Coker of Coker 739, Chapel Hill, Orange Co., North Carolina, U.S.A. 5. Amanita pubescens sensu Coker, Louisiana State Univ., Baton Rouge, East Baton Rouge Parish, Louisiana, U.S.A. (RET 802-10) 6. Amanita pubescens sensu Coker, Hafer Park, Edmond, Oklahoma Co., Oklahoma, U.S.A. [Ovrebo 4754 (CSU)] 7. Amanita pubescens sensu Coker, Hafer Park, Edmond, Oklahoma Co., Oklahoma, U.S.A. [Ovrebo 4754 (CSU)] 8. Amanita pubescens sensu Coker, Hafer Park, Edmond, Oklahoma Co., Oklahoma, U.S.A. [Ovrebo 4754 (CSU)]
intro	For the time being, please see the technical tab for the accumulating taxonomic details.
odor/taste	The odor of this species is reportedly "mild." Flavor has not been reported.
spores	The spores measure (9.3-) 9.5 - 11.5 (- 12.0) × (6.5-) 6.8 - 8.0 (-9.3) ) µm and are ellipsoid (infrequently broadly ellipsoid) and inamyloid. Clamp status on bases of basidia is unknown.
discussion	Dried material, photos, and information from Dr. Clark L. Ovrebo (CSU) indicate that this taxon is present in eastern Oklahoma; the same from David P. Lewis, that the taxon is present in the sandy forests of eastern Texas; and recent mushroomobserver postings and donated material from Logan Wiedenfeld demonstrate the species also occurs under Pecan (Carya illinoinensis) in Louisiana. Coker's collections were from North Carolina. Jenkins [JE77] considered this name a nomen dubium. Nevertheless, Coker supplies a very clear macroscopic description of the fungus to which he applied Schweinitz's name.—R. E. Tulloss, D. P. Lewis, C. L. Obvrebo
brief editors	RET

name

Amanita pubescens sensu Coker

author

sensu Coker. 1917. J. Elisha Mitchell Scient. Soc. 33(1/2): 14, pl. 8-9, 63.

name status

sensu

english name

"Coker's Pubescent Amanita"

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.

accession	locus	voucher	source
MH930992	nrITS	26.v.2008 D. P. Lewis 8535 (RET 430-5)	Geml et al., Naturalis Biodiversity Centre, Leiden
MH930997	nrITS	10.ix.2014 Talena A. Fowler 14091001 (RET 683-7)	Geml et al., Naturalis Biodiversity Centre, Leiden
MH930998	nrITS	20.viii.2008 C. L. Ovrebo 4754 (CSU)	L. V. Kudzma, Annandale, NJ
MK327263	nrLSU	25.viii.2017 David P. Lewis 12183 (RET 809-1)	L. V. Kudzma, Annandale, NJ
MH931002	nrLSU	10.vii.2017 Logan Wiedenfeld s.n. (RET 802-10)	L. V. Kudzma, Annandale, NJ
MK327264	nrITS	25.viii.2017 David P. Lewis 12183 (RET 809-1)	L. V. Kudzma, Annandale, NJ
MH930991	nrITS	10.vii.2017 Logan Wiedenfeld s.n. (RET 802-10)	L. V. Kudzma, Annandale, NJ
MK327267	nrITS	5.ix.2009 Felipe Wartchow & C. L. Ovrebo s.n. (RET 599-2)	L. V. Kudzma, Anandale, NJ
MH930996	nrITS	8.ix.2012 David P. Lewis 10459 (RET 606-8)	Geml et al., Naturalis Biodiversity Centre, Leiden
MH930995	nrITS	30.v.2013 Brooks Young s.n. [D. P. Lewis 10712] (RET 606-6)	Geml et al., Naturalis Biodiversity Centre, Leiden
MH930994	nrITS	8.ix.2012 David P. Lewis 10458 (RET 605-4)	Geml et al., Naturalis Biodiversity Centre, Leiden
MH930990	nrITS	25.viii.2005 C. L. Ovrebo C. L. Ovrebo 4521 (CSU)	L. V. Kudzma, Annandale, NJ
MK351828	nrLSU	5.ix.2009 Felipe Wartchow & C. L. Ovrebo s.n. (RET 599-2)	L. V. Kudzma, Anandale, NJ
MH930993	nrITS	5.ix.2009 Felipe Wartchow & C. L. Ovrebo s.n. (RET 599-3)	Geml et al., Naturalis Biodiversity Centre, Leiden

revisions

Tulloss herein.

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.

Apparently there is no type for A. pubescens Schwein. per Jenkins (1977. Biblioth. Mycol. 57: 79). Jenkins considered Schweinitz' name a nomen dubium.

Coker (1917) comments, "That this is Schweinitz's species I have no doubt."

The protolog of Amanita pubescens Schwein. is to be found here: 1822. Schriften Naturf. Ges. Leipzig 1: 79. The protolog is presented here in its entirety:

"554. 17. pileo pubescente luteo margine involuto, lamellis candidis, stipite brevi bulboso e candido lutescente pubescente.

"Raris in graminosis Julio. Pileus tenui pube obtectus. Stipes brevis, vix unciam separans, bulbo crasso, volva evanescente, annulo nullo."

Translation (with added punctuation for readability):

554. 17. with yellowish pubescent pileus with decurved margin; with lamellae white; with stipe short, bulbous, from white becoming yellowish, pubescent

Rare, in grass, July. Pileus thin, covered with pubescence. Stipe short, separating with some difficulty, with broad bulb, with evanescent volva, exannulate.

The following material is based on the description of this taxon by Coker (1917); recently annotated and photographed collections from Texas and Oklahoma with annotations and photographs by David P. Lewis and Dr. Clark Ovrebo, respectively; and revision of available material by R. E. Tulloss.

pileus

23 - 85 mm wide, very light brown (near Ridgway's Maize Yellow but paler) to sordid whitish to light brownish, hemispheric at first then convex to planoconvex to planar, slightly depressed in disc with age, moist; context 4 - 10 mm thick, slightly yellowish white to sordid whitish to light brownish; margin slightly striate (up to 0.25R), decurved; universal veil as small, often rather flat, soft warts, concolorous with pileus, sometimes scattered, "densest over disc, firmly adherent" (Coker 1917).

lamellae

free (but just barely per Coker), close to "rather crowded" (Coker 1917), whitish or concolorous with pileus, 4 - 13 mm broad, acute at stipe end, rounded at pileus margin and with considerable portion exposed below pileus margin, with fimbriate to flocculent edges; lamellulae truncate, of diverse lengths, ?frequency hard to determine in dried material?.

stipe

10 - 75 × 4 - 15 mm (length probably includes part or all of bulb), very pale ash gray (nearly white) to white to light brownish, moist, sometimes browning, pulverulent to glabrous, constricted about mid-height or narrowing downward, flaring at apex; bulb rather abrupt, somewhat radish-shaped [with radical curling upward (somewhat suggesting pig's tail) in one Texas specimen] or turbinate, "usually more than half" within substrate; context solid, firm, with "central cylinder of white, rather firm stuffing"; exannulate; universal veil creamy yellos to buff, as firm "conspicuous but low, irregular rim" on bulb ("almost cothurnate" in Overebo 4754), sometimes with ridge extended by triangular detersile fragments of membranous limb, with exterior covered with "fibrous flocculence" or (Ovrebo 4754) "matted tomentose."

odor/taste

Odor mild. Taste not recorded.

macrochemical
tests

none recorded.

pileipellis

25 - 45 μm thick, apparently lacking gelatinized suprapellis, i.e., comprising single uniform layer; filamentous undifferentiated hyphae 2.5 - 4.2 μm wide, interwoven densely in lateral view, subradially oriented in scalp view, sometimes appearing glued together by gelatinized material from universal veil.

lamella trama

bilateral, divergent; filamentous undifferentiated hyphae ??; inflated cells ??; vascular hyphae 12.6 - 15.0 μm wide, sinuous, sometimes coiling.

subhymenium

comprising 2 - 4 layers of subglobose inflated cells and some inflated branching cells, small cylindric to subglobose cells may be at bases of shorter basidia.

basidia

53^± × 14.5 μm, ??; clamps present (frequency not determined).

universal veil

On the pileus: filamentous undifferentiated hyphae 1.8 - 6.3 μm wide, branching, plentiful, with some terminal segments slightly gelatinized; inflated cells common, thin-walled, subfusiform to narrowly clavate to broadly sausage-shaped (e.g., 44 × 22 μm) or narrowly ellipsoid (e.g., 65 × 24 mu;m) or broadly clavate to ellipsoid (22 - 51 × 16.8 - 32 μm) or subglobose (e.g., 28 × 25 μm), terminal singly; vascular hyphae 2.5 - 4.6 μm wide, common, sinuous; clamps rather frequent. On stipe base: ??.

stipe context

longitudinally acrophysalidic; at surface becoming partially gelatinized, otherwise, like interior, densely packed tissue dominated by acrophysalides; filamentous undifferentiated hyphae 3.5 - 9.4 μm wide, branching difficult to observe due to tissue density; acrophysalides up to 135 × 33 μm, with walls ?? μm thick; vascular hyphae 2.5 - 9.8 μm wide, common, branching, subsinuous to sinuous; clamps present.

lamella edge tissue

sterile.

basidiospores

send to graphing tool

[60/3/2] (8.4-) 9.3 - 11.0 (- 12.0) × (6.4-) 6.5 - 8.0 (-9.3) ) µm, (L = 9.6 - 10.7 µm; L' = 10.1 µm; W = 7.1 - 7.6 µm; W' = 7.4 µm; Q = (1.22-) 1.28 - 1.50 (-1.57); Q = 1.35 - 1.41; Q' = 1.38).

ecology

Scattered to gregarious. Louisiana: At 7-21 m elev. Often in open areas, with Quercus spp., for example Q. falcata, Q. stellata, or Q. virginiana. North Carolina: "[I]n dry sandy soil in open groves." Oklahoma: At ca. 330 m elev. Under Quercus spp. including Quercus marilandica. Texas: Under Quercus alba.

material examined

RET: U.S.A.: LOUISIANA—East Baton Rouge Parish - Baton Rouge, Louisiana State Univ. [30.4086º N/ 91.1832º W, 7 m], 10.vii.2017 Logan Wiedenfeld s.n. [mushroomobserver #278311] (RET 802-10, nrITS & nrLSU seq'd.). Evangeline Parish - Chicot St. Pk., ca. W entrance [30.791º N /92.282º W, 20-21 m], 8.ix.2012 David P. Lewis 10458 (RET 605-4, nrITS seq'd.), D. P. Lewis 10459 (RET 606-8, nrITS seq'd.). NORTH CAROLINA—Orange Co. - Chapel Hill, Univ. of North Carolina, on path between athletic field and Meeting of the Waters [ca. 35°54'04" N/ 79°02'02" W, 101 m], 12.ix.1913 W. C. Coker 739 (NCU); Chapel Hill, Univ. of North Carolina, ca. NE gate of arboretum, 14.ix.1913 W. C. Coker 767 (NCU); Chapel Hill, Univ. of North Carolina, across [stream—ed.] branch, S of athletic field, 9.ix.1915 W. C. Coker 1714 (NCU); Chapel Hill, Univ. of North Carolina, in front of Dr. Wagstaff's [residence?], s.d. W. C. Coker 1756 (NCU). OKLAHOMA—Oklahoma Co. - Edmond, Hafer Pk. [35.6422° N/ 97.4558° W, 327 m], 25.viii.2005 C. L. Ovrebo 4521 (CSUC, nrITS seq'd.), 20.viii.2008 C. L. Ovrebo 4754 (CSUC, nrITS seq'd.), 5.ix.2009 Felipe Wartchow & C. L. Ovrebo s.n. (RET 599-2, nrITS & nrLSU seq'd.), s.n. (RET 599-3, nrITS seq'd.). TEXAS—Angelina Co. - Zavalla, north of town by church [30.7085º N/ 93.8272º W, 37 m], 25.viii.2017 David P. Lewis 12183 (RET 809-1, nrITS & nrLSU seq'd.). Hardin Co. - Big Thicket Nat. Preserve, Lance Rosier Unit [30.2609º N/ 94.5259º W, 20 m], 10.ix.2014 Talena A. Fowler 14091001 (RET 683-7, nrITS seq'd.). Houston Co. - Grapevine, Young residence, 30.v.2013 Brooks Young s.n. [D. P. Lewis 10712] (RET 606-6, nrITS seq'd.). Jasper Co. - Buna, Whitehouse business area off US Rte. 96, 26.v.2008 D. P. Lewis 8535 (RET 430-5, nrITS seq'd.). Jefferson Co. - Beaumont Forest Lawn Cemetery, 21.ix.2014 D. P. Lewis 11466 (RET 683-1). Orange Co. - Vidor, ca. former Lewis residence, 23.viii.1977 D. P. Lewis 1113 (F). Polk Co. - Big Thicket Nat. Preserve, Big Sandy Unit, 4.vii.2014 D. P. Lewis 11337 (RET 682-9). Tyler Co. - Lake Hyatt area, corner of Lake Hyatt Rd. 4770 & Bumstead Cemetery Rd. 4800, 2.vii.2014 D. P. Lewis 11250 (RET 682-10).

discussion

As was apparently the case with Coker's collections of this taxon, recent collections have been inadvertently mixed with material of Amanita recutita sensu Coker. Apparently the species have a tendency to grow in a common habitat. From the existing evidence, this may be an open area with Quercus as an available symbiont. With color changes due to age and potential loss of the partial veil in A. recutita sensu Coker, the two taxa may be sufficiently similar to the unaided eye that mixed collections have occurred more than once. This appears to have led to incorrect spore measurement data having been provided by Coker (1917) for the present species.

The following figure provides sporograph comparison for the two taxa of interest:

Recent collections from Oklahoma (Dr. Clark L. Ovrebo), Texas (David P. Lewis), and Louisiana (Logan Wiedenfeld) have been reviewed by RET; and a number of the have yielded a shared nrITS sequence with a very rare form of the 5' motif for the nrLSU sequence included. These collections appear to represent the taxon photographed and described by Coker.

Work is on-going.

t.b.d.

citations

—R. E. Tulloss

editors

RET

Information to support the viewer in reading the content of "technical" tabs can be found here.

Spore data for collections
provisionally identified as: Amanita pubescens sensu Coker

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.

basidiospore definition

Spore Measurements by Collection

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name	Amanita pubescens sensu Coker
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