name | Amanita flaviphylla |
name status | nomen acceptum |
author | O. K. Mill. |
english name | "Yellow-To-The-Core Lepidella" |
images | |
intro |
The following is largely based on the original description of Miller (1992). |
cap |
The cap of Amanita flaviphylla is 28 - 52 mm wide, broadly convex to plano-depressed, viscid, yellow, with a nonstriate margin that does not extend past the ends of the gills. The cap is sand-covered with thin, filmy volval remnants over the center; these remnants often disappear. The flesh is yellow. |
gills |
The gills are adnate with a fine line, close, yellow, and moderately broad. Short gills are plentiful and of diverse lengths. |
stem |
The stem is 30 - 55 × 4 - 11 mm, cylindric, dry, undecorated, nearly hollow, buff to pale yellow or yellowish white. The basal bulb is 10 - 18 × 13 - 24 mm, compressed ovate, concolorous with the stem, and marginate to obscurely marginate. The ring is attached to the top of the stem, skirt-like, lightly striate on the upper surface, becoming appressed to the stem, and light orange to concolorous with the stem. The volva is scant or absent. The flesh is yellow, with the color most saturated near the stem's central hollow cylinder. |
odor/taste |
The odor is not distinctive. |
spores |
The spores measure 11 - 13 × 5 - 6 µm and are elongate to cylindric and strongly amyloid. Clamps are present at bases of basidia, frequency unknown. The spore deposit is described as "buff." [Note: Miller seems to use this term to mean something like pale primrose yellow. A spore print should be attempted without allowing the gill edges to touch the paper on which the print falls—just to be sure that yellow cells from the gill edges are not the cause of the yellow tint apparently seen in by Miller.] |
discussion |
Originally described from the state of Western Australia, in association with Eucalyptus, Melaleuca, and Hakea growing in very sandy soil. It is known from at least three locations in southern Western Australia. The photograph with the original description seems to show scattered warts on the one cap of which the top is visible which is inconsistent with the written description of the volva. The yellow and orange pigments and their distribution is extremely reminiscent of the effect seen in Amanita specimens with the yellowing syndrome, see A. subsolitaria (Murrill) Murrill. The yellow pigments present in the Syme photo (above) are not at all typical of the yellowing syndrome. Note also that there is no orange pigment visible in the Syme photograph. The presence of clamps, the noncellular subhymenium, and the cap margin which appears sparsely appendiculate in the Miller photograph cited above (and is clearly appendiculate in the Syme photo), all support Miller's placement of this species in section Lepidella. Precise placement within section Lepidella is not possible at this time.—R. E. Tulloss |
brief editors | RET |
name | Amanita flaviphylla | ||||||||
author | O. K. Mill. 1992a ["1991"]. Canad. J. Bot. 69: 2696, figs. 20-23, 45. | ||||||||
name status | nomen acceptum | ||||||||
english name | "Yellow-To-The-Core Lepidella" | ||||||||
etymology | flavus (yellow) + -phyllus (orig. from Grk., in compound words, meaning "-leaved" or, in this mycological case, "-gilled") | ||||||||
MycoBank nos. | 358168 | ||||||||
GenBank nos. |
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holotypes | VPI | ||||||||
intro |
The following text may make multiple use of each data field. The field may contain magenta text presenting data from a type study and/or revision of other original material cited in the protolog of the present taxon. Macroscopic descriptions in magenta are a combination of data from the protolog and additional observations made on the exiccata during revision of the cited original material. The same field may also contain black text, which is data from a revision of the present taxon (including non-type material and/or material not cited in the protolog). Paragraphs of black text will be labeled if further subdivision of this text is appropriate. 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 drawn from the protolog of the present species. from the protolog: Basidiomes small to medium-sized. | ||||||||
pileus | from protolog: 280 - 520 mm wide, yellow (2A2), broadly convex to plano-depressed, viscid, sand-covered; context yellow (3A3); margin non-striate, "even with...lamellae"; universal veil as thin filmy layer [particularly noticeable] over disc. | ||||||||
lamellae | from protolog: adnate with a fine line, close, yellow (3A4-5) "throughout," with even edge, moderately broad; lamellulae in one tier. [Note: The photograph in the background on this page illustrates a specimens having rounded-attenuate lamellulae of diverse lengths. The editor cannot help but remark how rarely the description of species as having one or a specific small number of "tiers" of lamellulae is supported by careful revision.—ed.] | ||||||||
stipe | from protolog: 30 - 55 × 4 - 11 mm, buff (3A2), cylindric, dry, evenly glabrous, bulb 10 - 18 × 13 - 24 mm, appressed ovoid, concolorous with stipe, marginate to obscurely marginate, sand-covered; context nearly hollow, [predominantly ]yellow (3A3), in center darker yellow (3A4); partial veil apical, light orange (5A2), [membranous, ]pendent, [eventually ]appressed to surface, lightly striate above; universal veil not described. | ||||||||
odor/taste | from protolog: Odor indistinct. Taste not recorded. | ||||||||
macrochemical tests |
none recorded. | ||||||||
pileipellis | from protolog: up to 120 - 160 μm thick, partially gelatinized, "forming...refractive glutinous pellicle"; filamentous hyphae 3 - 6 μm wide, hyaline; clamps scattered. | ||||||||
pileus context | from protolog: filamentous hyphae 4 - 13 (-23) µm wide, loosely interwoven, thin-walled, hyaline, with some segments moderately "swollen," "with scattered yellow oleiferous cells"; clamps occasional. | ||||||||
lamella trama | from protolog: [bilateral, ]divergent; filamentous hyphae 3 - 9 µm wide, hyaline, thin-walled; clamp connection frequent. | ||||||||
subhymenium | from protolog: comprising short irregular cells and short uninflated hyphal segments, with cells of all types 3 - 12 µm wide, thin-walled, hyaline. | ||||||||
basidia | from protolog: 44 - 46 × 12 - 13 μm, 4-sterigmate; clamps not described. [Note: We assume that the failure to mention clamps on the basidia is a typographical error or other unintentional oversight. Bas (1969) reports that, when clamps were present anywhere in a species, they were present at the bases of basidia. Since Miller states clamps are frequent in the lamella trama, we think it highly probable that they are present at the bases of basidia in the present species.—ed.] | ||||||||
universal veil | from protolog: On pileus: filamentous hyphae 2 - 9 µm wide, hyaline; inflated cells pyriform to ovoid to clavate, 34 - 85 × 14 - 23 µm, terminal, thin-walled; clamps absent. On stipe: not described. [Note: It may be possible to read the protolog in such a way that the filamentous hyphae would be said to form a filmy layer over the remainder of the universal veil tissue; however, given that the author used the term "filmy layer" to describe the macroscopic appearance of the volval remnants on the pileus and given that the author has the idiosyncratic habit of mixing macroscopic description into microscopic ones, we conclude that that the issue in question arises from the latter quirk.—ed.] | ||||||||
stipe context | not described. | ||||||||
partial veil | not described. | ||||||||
lamella edge tissue | from protolog: inflated cells 21 - 38 × 11.8 - 18.7 μm, broadly clavate to pyriform to subglobose, thin-walled, hyaline, sparse to abundant. [Note: This tissue misdescribed by Miller as "cheilocystidia."—ed.] | ||||||||
basidiospores | from protolog: [-/-/-] 11.0 - 13.0 × 5.0 - 6.0 μm, (Q = 1.56 - 2.60; Q' = 2.3), thin-walled, amyloid (dark blue), ellipsoid to elongate to cylindric; apiculus "obscure"; contents not recorded; "buff" in deposit. | ||||||||
ecology | from protolog: In small groups. In very sandy soil under Eucalyptus ficifolia, E. marginata, Melaleuca cuticularis Labill. and Hakea spp. | ||||||||
material examined |
from protolog: AUSTRALIA: WESTERN AUSTRALIA—Town of Manjimup - unkn. loc., | ||||||||
discussion | t.b.d. | ||||||||
citations |
The editors express their thanks to Dr. Elaine Davison for her assistance with Western Australia geographical and other data relating to Miller's original materials of this taxon. —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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