Amanita sp-F16

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name	Amanita sp-F16
name status	cryptonomen temporarium
author	Tulloss
intro	The specimen of W. A. Murrill to which the current code is applied was originally identified by its collector as the taxon now called A. murrilliana, which proved to be an error discovered during RET's study of original material of that latter taxon. This specimen is the only one known to RET that may possibly belong to the apparently rare and poorly known species Amanita cokeriana Singer. However, rather than claim this specimen is a true representative of A. cokeriana, it is treated here until more information becomes available.
cap	Based on the fact that Murrill placed the collection treated here in the taxon now named A. murrilliana and also based on the shading of the cap colors in the dried material, the cap was probably pallid at the margin and darker in the center—probably shades of cream, tan, and/or brown. The flesh of the cap was not described. The cap's margin was striate and nonappendiculate. No remnants of the volva were present on the cap.
gills	There is no available information about the gills of this mushroom.
stem	Very little information is available about the stem of this species. It was probably pallid and narrowing upward, and a ring was usually present, although sometimes fragmentary. The sack-like volva was probably white or whitish on the outer surface and was elongate; it was connected to the stem on the sides as well as at the stem's base. There was a small internal limb of the volva placed at the point of the volva's attachment to the stem.
odor/taste	There is no inforamation available on the odor or taste of this mushroom.
spores	The spores measure (11.2-) 11.6 - 15.1 (-19.0) × (5.5-) 6.0 - 7.6 (-8.5) µm and are elongate to cyllindric (rarely bacilliform) and inamyloid. Clamps are common at bases of basidia.
discussion	The single collection represented by this taxon page is the only one that I have seen that might represent the apparently rare and poorly known A. cokeriana (see discussion of A. recutita sensu Coker.—R. E. Tulloss
brief editors	RET

name

Amanita sp-F16

name status

cryptonomen temporarium

GenBank nos.

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accession	locus	voucher	source



No data available in table

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 text is based upon original research by R. E. Tulloss.

The specimen of W. A. Murrill to which the current code is applied was originally identified by its collector as the taxon now called A. murrilliana, which proved to be an error discovered during RET's study of original material of that latter taxon.

This specimen is the only one known to RET that may possibly belong to the apparently rare and poorly known species Amanita cokeriana Singer. However, rather than claim this specimen is a true representative of A. cokeriana, it is treated here until more information becomes available.

pileus

pallid at margin, darker over disc, probably shades of cream, tan, and/or brown; context not described; margin striate, nonappendiculate; universal veil absent.

lamellae

no description.

stipe

probably pallid, narrowing upward; context undescribed; partial veil usually present, although sometimes fragmentary; universal veil as saccate volva, probably white or whitish on exterior, "long like verna" [per Murrill's field notes], connected to stipe on sides as well as at base, with small limbus internus at point of attachment to stipe.

odor/taste

not recorded.

macrochemical
tests

none recorded.

pileipellis

?? µm thick; filamentous, undifferentiated hyphae ?? µm wide, dominantly radially arranged, with some subradial; vascular hyphae not observed.

lamella trama

badly damaged and unrehydratable in Murrill F 16216

subhymenium

badly damaged and unrehydratable in Murrill F16216

basidia

badly damaged in Murrill F16216; clamps rather common.

universal veil

On pileus: absent. On stipe base, exterior surface: filamentous, undifferentiated hyphae 1.1 - 4.5 µm wide, branching, partially collapsed, often more or less gelatinized, singly and in fascicles interwoven in rather tight lattice structure, without dominant orientation, but locally existing in small groups of broad longitudinally oriented fascicles; vascular hyphae not observed. On stipe base, interior: filamentous, undifferentiated hyphae 3.6 - 8.9 µm wide, branching, plentiful, singly and in fascicles, interwoven in open lattice; inflated cells thin-walled, terminal, common to plentiful, ellipsoid to subclavate, up to 122 × 64 µm or larger??, thin-walled, unevenly distributed, most common away from surfaces; vascular hyphae not observed. On stipe base, inner surface: partially gelatinized to gelatinized, suggesting particularly uniform pileipellis, comprising closely packed longitudinally oriented, filamentous, undifferentiated hyphae; vascular hyphae not observed.

stipe context

longitudinally acrophysalidic; badly damaged in the specimens of Murrill F16216; acrophysalides dominating in interior, up to at least 109?? × 30?? µm.

partial veil

gelatinized at least on upper surface in material examined; filamentous, undifferentiated hyphae 0.9 - 5.1 µm wide, branching, densely placed, radially arranged with occasional hyphae perpendicular to the majority; inflated cells not observed in interior??; vascular hyphae not observed; clamps present, frequency difficult to assess.

lamella edge tissue

not described.

basidiospores

send to graphing tool

[74/4/1] (11.2-) 11.6 - 15.1 (-19.0) × (5.5-) 6.0 - 7.6 (-8.5) µm, (L = 13.0 - 13.6 µm; L’ = 13.3 µm; W = 6.7 - 7.1 µm; W’ = 7.0 µm; Q = (1.63-) 1.69 - 2.53 (-3.11); Q = 1.86- 1.97; Q’ = 1.90), hyaline, colorless, thin-walled, smooth, inamyloid, elongate to cylindric, rarely bacilliform, often adaxially flattened, occasionally expanded at one end, sometimes constricted, sometimes langeniform or "lepiotoid" or subsigmoid; apiculus sublateral, ??; contents granular to ??; color in deposit unknown.

ecology

Gregarious. In Quercus-Pinus woods.

material examined

U.S.A.: FLORIDA—Alachua Co. - ca. Gainesville, Sugarfoot, 29.v.1938 W. A. Murrill F16216 (nonconformant paratype of Venenarius gemmatus var. volvatus [≡Amanita murrilliana], FLAS).

discussion

Since Murrill had a deserved reputation for segregating collections based on differences insufficient to stand the test of subsequent revision, I suggest that we can assume that the present collection was similar in appearance to A. murrilliana.

The poor condition of the single collection revised prevented description of much of the microscopic anatomy.

t.b.d.

citations

—R. E. Tulloss

editors

RET

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name	Amanita sp-F16
name status	cryptonomen temporarium
author	Tulloss

name	Amanita sp-F16

name	Amanita sp-F16

Spore data for collections
provisionally identified as: Amanita sp-F16 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

[top]

stirps Caesarea
5

stirps Calyptratoides
2

stirps Calyptroderma
5

stirps Chambersiana
1

1↓
stirps Hemibapha
44

infraspecific taxa of hemibapha
1

stirps Pachysperma
5

stirps Ristichii
1

stirps Spreta
2

stirps Torrendii
1

Spore Measurements by Collection

stirps Caesarea5

stirps Calyptratoides2

stirps Calyptroderma5

stirps Chambersiana1

1↓ stirps Hemibapha44

infraspecific taxa of hemibapha1

stirps Pachysperma5

stirps Ristichii1

stirps Spreta2

stirps Torrendii1

Amanita sp-F16

Spore Measurements by Collection

stirps Caesarea
5

stirps Calyptratoides
2

stirps Calyptroderma
5

stirps Chambersiana
1

1↓
stirps Hemibapha
44

infraspecific taxa of hemibapha
1

stirps Pachysperma
5

stirps Ristichii
1

stirps Spreta
2

stirps Torrendii
1