| name |
Amanita sp-C19 |
| author |
Tulloss |
| name status |
cryptonomen temporarium |
| GenBank nos. |
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|
| 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 J. E. Lindgren's notes and photograph and on original research of RET. |
| pileus |
up to 106 mm wide, "muddy creamy yellow," planoconvex; contents up to 17 mm thick; margin ??; universal veil as scattered warts, white. |
| lamellae |
free, ??, white to cream with edges white and densely fimbriate; lamelluae truncate to rounded truncate, common to plentiful, of diverse lengths, infrequently arising near stipe rather than margin. |
| stipe |
up to 73 × 26 mm, white(?), subcylindric, flaring at apex; bulb up to 31 × 37 mm, narrowing downward; context white, partially stuffed to hollow, with central cylinder occupying one-third or less of stipe width; partial veil thin and appressed to lower stipe; universal veil as robust short limb with triangular cross-section. |
| odor/taste |
neither recorded. |
macrochemical
tests |
none recorded. |
| lamella trama |
bilateral, divergent; wcs = 35 - 45 μm (poor rehydration); wst-near = 20 - 30 μn; wst-far = 40 - 45 μm; filamentous undifferentiated hyphae 2.0 - 4.0 μm wide, plentiful to dominant; inflated cells in subhymenial base intercalary, ovoid to ellipsoid to clavate (e.g.) 16.5 & 13.0 μm, occasionally in chains. |
| subhymenium |
??, with basidia arising from ellipsoid and subglobose cells and slightly inflated short hyphal segments; clamps found about one cell away from basidial bases. |
| basidia |
35 - 54 × 8.2 - 14.0 (-17.0) μm, 4-sterigmate; clamps common. |
| basidiospores |
[41/2/1] (8.5-) 9.2 - 12.2 (-16.0) × (5.8-) 6.2 - 8.0 (-10.8) μm, (L = 10.7 μm; L' = 10.7 μm; W =7.1 μm; W' = 7.1 μm; Q = (1.32-) 1.35 - 1.66 (-2.0); Q = 1.51 - 1.52; Q' = 1.51), hyaline, colorless, thin-walled, smooth, inamyloid, ellipsoid to elongate, often adaxially flattened; apiculus sublateral, cylindric; contents granular to guttulate; spore color not recorded. |
| ecology |
In group of ca. 6. At 1220 m elev. Under Picea and Pinus ponderosa in grass. |
| material examined |
U.S.A.:
WASHINGTON—Skamania Co. - GPNF, Buck Crk.,
5.vi.1990 J. E. Lindgren 90-15 (in herb. Lindgren;
RET 015-7, nrITS seq'd.). |
| discussion |
This species was originally mistaken for A. breckonii by RET. However, the two taxa can be segregated genetically using sequences from the nrITS locus.
[Note: The question of clamps at the bases of basidia should be re-examined.—ed.]
A sporograph comparison of the two taxa is provided below:
|
| citations |
—R. E. Tulloss & J. E. Lindgren |
| editors |
RET |
|
Spore data sets and their composite