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
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
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 text is derived from molecular studies of
Stephen D. Russell, and other original research
by R. E. Tulloss.
68 mm wide, tan without fulvous tint (close to 5C5),
with disc dark fulvous (as often seen in
fulva), planar, umbonate, tacky;
context white, with very minimal brown line
under pileipellis in disc only, not changing with
cutting or bruising, 5 mm thick above stipe, thinning
evenly for three-quarters distance to margin, thence
membranous; margin striate (0.35R), not
appendiculate, often splitting deeply at maturity;
universal veil absent.
free, crowded, pale orangish cream in mass, pale cream
in side view, unchanging when cut or bruised, 4 mm
broad; lamellulae truncate, unevenly
distributed, of diverse lengths, common, with some
lamella-lamellula pairs giving appearance of forking
because of lamella curving around lamellula.
134 × 13 mm, pale cream or faintly orangish cream,
more orange and more sordid where handled, with rust
to orange-brown staining where stipipellis is broken
or where surface fibrils are crushed together,
narrowing upward, slightly flaring at apex, faintly
longitudinally striatulate, with longitudinally
oriented fibrils densely placed and more strongly
pigmented than ground; context white to
off-white, not changing when cut or bruised, hollow,
with 7 mm wide central cylinder lined with white
cottony fibrils; exannulate; universal
veil as saccate volva, white, staining when
damaged like stipe surface, membranous, subtubular,
with dry exterior, lacking the rusty orange
staining common in
distinct from stipe context and apparently separable
from stipe context even below stipe base.
Odor indistinct. Taste not
bilateral, divergent; wcs =
60 - 65 µm (fresh material);
??; subhymenial base
?? µm wide,
??, with septa markedly
constricted both in divergent elements of subhymenial
base and in central stratum, with occasional segment
reaching from close to central stratum to one cell
away from basidial base; inflated cells apparently
all intercalary; vascular hyphae
?? µm wide,
wst-near = 110 - 130 µm (fresh
material); wst-far = 140 - 145 µm
(fresh material); comprising 1 - 3 (-4) cells between
subhymenial base and base of longest basidia, having
branching structure very apparent despite plenitude of
inflated cells, with basidia arising predominantly
from globose to subglobose inflated cells and
occasionally from cells of other shapes or uninflated
or slightly inflated short hyphal segments.
69 - 89 × 16.0 - 21 µm, 4-sterigmate, with sterigmata
up to 5.5 × 3.0 µm; clamps rare or absent.