Amanita sp-F14 - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella

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name	Amanita sp-F14
name status	cryptonomen temporarium
author	Tulloss
english name	"Kissimmee Yellow Dust Amanita"
images	1. Amanita sp-F14, Osceola Co., Florida, U.S.A.
intro	This description is based on several collections (many containing multiple specimens) that were sent to RET by Ellen Greer, who was then living in Kissimmee, Florida. Well-annotated collections of this taxon are sought by the editors.
cap	The cap of Amanita sp-F14 is reported to be about 42 mm wide and yellow-orange, but not with the uniformity of tone familiar from A. flavoconia. The convex cap fades to tan in direct sunlight. Its margin is not radially grooved. The volva is often absent. When present it takes the form of scattered, easily crushed, yellow warts.
gills	The gills are free, close, and white. There are plentiful short gills.
stem	The stem of A. sp-F14 is reported to be about 65 × 8 mm, cylindric, and white. bulb ??; It bears a a small, white, skirt-like ring that sometimes has yellow volval remnants attached to its edge. Small, yellow, crushable volval warts may be found on the lower stem or bulb or in surrounding soil or litter.
odor/taste	Odor and taste have not been recorded for this species.
spores	Spores of this species measure (6.1-) 7.0 - 9.5 (-10.0) × 4.5 - 6.0 (-6.5) μm and are ellipsoid to elongate (rarely broadly ellipsoid, rarely cylindric) and amyloid. Clamps are absent from bases of basidia.
discussion	Our material was collected in a lawn in Osceola County, Florida, U.S.A. in association with Laurel Oak (Quercus laurifolia). This mushroom seems to belong in the "A. flavoconia group" and, within that group, with the taxa with narrower spores and caps not having their pigment arranged in fine radial lines (such as A. elongata and A. jenkinsii).—R. E. Tulloss and C. Rodríguez Caycedo
brief editors	RET

name

Amanita sp-F14

name status

cryptonomen temporarium

english name

"Kissimmee Yellow Dust Amanita"

GenBank nos.

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accession	locus	voucher	source

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 collectors' notes and photographs and on original research of C. Rodríguez Caycedo and R. E. Tulloss.

pileus

42^± mm wide, yellow-orange, fading to tan in direct sunlight, convex; context not recorded; margin nonstriate; universal veil absent or as scattered warts, yellow, flocculose, friable, detersile.

lamellae

free, close, white; lamellulae plentiful.

stipe

65^± × 8^± mm, cylindric, white; bulb ??; context not recorded; partial veil white, ??, membranous, skirt-like, persistent, on edge bearing yellow universal veil material; universal veil as yellow, friable warts on lower stipe or bulb and in surrounding substrate.

odor/taste

not recorded.

macrochemical
tests

none recorded.

peridium micro

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basidiospores

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[140/7/1] (6.1-) 7.0 - 9.5 (-10.0) × 4.5 - 6.0 (-6.5) μm, (L = 7.3 - 8.3 μm; L' = 7.9 μm; W = 4.9 - 5.5 μm; W' = 5.1 μm; Q = (1.26-) 1.36 - 1.78 (-2.0); Q = 1.48 - 1.68; Q' = 1.55), ??, smooth, amyloid, ellipsoid to elongate, rarely broadly ellipsoid, rarely cylindric, adaxially flattened; apiculus sublateral, cylindric; contents ??; ?? in deposit.

ecology

Subgregarious to scattered. At 16 m elev. Florida: In lawn near Quercus laurifolia.

material examined

U.S.A.: FLORIDA—Osceola Co. - Kissimmee, Good Samaritan Village, Veteran's Park [28°15'53" N/ 81°26'53" W, 16 m], 7-11.vi.1994 Ellen Greer s.n. (RET 127-10, nrITS & nrLSU seq'd.), 25.vii.1994 E. Greer s.n. (RET 373-4), 30.vii.1994 E. Greer s.n. (373-5), 15.viii.1994 E. Greer s.n. (372-10, nrITS seq'd.), 16.viii.1994 E. Greer s.n. (RET 373-2), 17.viii.1994 E. Greer s.n. (RET 373-6), 22.viii.1994 E. Greer s.n. 22.viii.1994 E. Greer s.n. (RET 373-7), 29.viii.1994 E. Greer s.n. (RET 373-3, nrITS & nrLSU seq'd.), ? E. Greer s.n. (RET 373-5).

discussion

A very similar taxon is A. jenkinsii, and molecular evidence suggests they may comprise a single species. A rather similar possible species with almost identical spore size and shape is A. sp-N47. However, the latter does not have intense yellow pigment like the present species and is more similar to some eastern North American rubescent taxa.

The reader may also wish to compare A. fraterna Murrill, originally described from Florida. The brief original description of that species mentions a pinkish color in the stipe flesh and describes cap pigmentation that could apply to A. sp-F14. However, this may not be a good distinguishing character; for other taxa similar to flavoconia (and flavoconia itself) can (at least occasionally) show pinkish stains in the stipe context.

more—t.b.d.

citations

—R. E. Tulloss and C. Rodríguez Caycedo

editors

RET

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Spore data for collections
provisionally identified as: Amanita sp-F14 Tulloss

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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