| name |
Amanita alauda |
| author |
Corner & Bas. 1962. Persoonia 2: 282, pl. 6c, fig. 37. |
| name status |
nomen acceptum |
| english name |
"Lark Death Cap" |
| etymology |
alauda "lark"; because of the variegated pileus of this species |
| MycoBank nos. |
326084 |
| GenBank nos. |
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|
| holotypes |
L (in liquid) |
| 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 derived entirely from the protolog of the present taxon. |
| pileus |
from protolog: 30 mm wide, sepia or pale purplish umber to mouse-colored, darker over disk, streaked by innate dark fibrils, especially near margin, becoming umbonate concave, eventually with uplifted margin [per figure], smooth, viscid; context white; margin non-striate; universal veil absent. |
| lamellae |
from protolog: free, crowded, white then cream, 3 mm broad, as 66 primaries; lamellulae attenuate, 0 - 1 between each otherwise adjacent pair of lamellae. |
| stipe |
from protolog: 55 × 5 mm, cylindric, white, smooth; context white, solid, firm; bulb as subbulbous stem base; partial veil apical, pendent, membranous, white, ca. 8 mm from point of attachment to edge, finely striate above, soon collapsing; universal veil limbate, membranous, white, 10 × 8 - 9 mm, with lower half connected with base of stipe, with upper half forming irregularly split limb with indistinct lobes. |
| odor/taste |
not recorded. |
macrochemical
tests |
none reported. |
| pileipellis |
from protolog: about 200 µm thick; suprapellis 75 - 100 μm thick, gelatinized; subpellis 100 - 125 μm thick, ungelatinized; filamentous hyphae irregularly disposed, with slight radial tendency, with tip cells uninflated and brown; ungelatinizing hyphae brown, embedded in suprapellis. [Note: Brown, ungelatinized hyphae have been observed in the gelatinized suprapellis of other tropical Amanita taxa. This raises the issue of whether these hyphae might be foreign to the amanitas.—ed.] |
| pileus context |
not described. |
| lamella trama |
from protolog: bilateral; central stratum very distinct, including clavate to cylindric, often terminal inflated cells up to 120 × 25 µm; subhymenial base rather indistinctly divergent and narrow, inclluding scattered ellipsoid to subcylindric cells up to 60 × 30 µm. |
| subhymenium |
from protolog: about 40 µm wide, cellular-subramose, with cells up 10 - 20 µm wide, with innermost cells hardly larger than those at base of basidia. |
| basidia |
from protolog: 35 - 45 × 10 - 13 µm, 4-sterigmate, with sterigmata ca. 5 µm long; clamps not observed. |
| universal veil |
from protolog: On pileus: absent. In volval limb: filamentous hyphae dominating, 3 - 15 (-25) µm wide, interwoven, sublongitudinally oriented; inflated cells scarce, up to 100 µm wide, limited to interior. |
| stipe context |
from protolog: longitudinally acrophyslidic; acrophysalides cylindric to clavate, up to 370 × 50 µm sometimes with short chain of subtending cells of similar form; at stipe surface, filamentous hyphae 3 - 6 µm wide, longitudinally oriented. |
| partial veil |
not described. |
| lamella edge tissue |
from protolog: inflated cells scattered, clavate to ellipsoid, up to 30 × 20 µm. |
| basidiospores |
from protolog: [-/-/-] 7.1 - 8.4 (-9.2) × 6.3 - 8.3 μm,
(Q = 1.0 - 1.15; Q = 1.05 - 1.10),
hyaline, colorless, smooth, thin-walled, amyloid, globose to subglobose;
apiculus proportionately small; contents cloudy, opalescent; color in deposit not recorded. [Fresh spores reported as 9.0 - 11.0 × 8.0 - 10.0 μm.] |
| ecology |
no information reported. |
| material examined |
from protolog: SINGAPORE: Botanic Gardens, 4.xii.1940 E. J. H. Corner s.n. (holotype, L, specimens in liquid and watercolor drawing). |
| discussion |
from protolog: "Among the dark-colored species with globulose spores of section Phalloideae, particularly A. murinacea Pat. (1928: 29) from Madagascar and A. fuliginea Hongo (1953: 69, fig. 1; colored plate in Imazeki & Hongo, 1957: pl. 18 fig. 103) from Japan seem to be comparable to the present species. The former is insufficiently described. It is not clear whether its mouse-gray cap is streaked or not. However, it seems to be different on account of the strongly bulbous base of the stipe, the dry, silky pileus, and the larger size. Amanita fuliginea differs by the ring turning brownish, the brownish squamulose-fibrillose stipe and the less streaky, subviscid to dry pileus.
"A remarkable feature of A. alauda is the viscid cuticle giving a strong impression of being fibrillose, which is caused by the rather wide, dark brown hyphae embedded in the gelatinous matter of the upper layer." |
| citations |
—R. E. Tulloss |
| editors |
RET |
|
Spore data sets and their composite