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According to our data Hebeloma ascophorus is not the name of a current valid species of Hebeloma. Our database has records for the following similar names
Full name: Agaricus ascophorus Peck [as "Agaricus (Hebeloma) ascophorus"] (1872)
Published: Ann. Rep. N.Y. St. Mus. nat. Hist.: 68 (1872)
Taxonomic status: This is a Pholiota.
Notes: Current name: Pholiota ascophora (Peck) Singer, Beih. Nova Hedwigia 29:266. 1969; ≡ Marasmius ascophorus (Peck) Cooke, Grevillea 19(92):104. 1891.

Types: UNITED STATES: New York: Greig, Lewis County (approx. 43.6815°N, 75.3546°W, alt. approx. 250 m a.s.l.) on burnt soil in pastureland, Sep. 1870, C.H. Peck (Holotype. herbarium acc. no. NYS-F-000328, HJB1000270).

Diagnosis: Pileus convex, smooth, viscid, pale alutaceous, often with a brighter colored disk; lamellae moderately broad, close, emarginate, attached, pallid or subolivaceous, stem equal, short, stufted or hollow, slightly fibrillose, paler than the pileus; spores produced in fragile, globuse asci borne on a thick, tapering, penetrating peduncle, elliptical, 1/3500' long. Plant 1' high, pileus 6"-12" broad, stem scarcely 1" thick. Burnt ground in pastures. Greig. September. (Plate 3, Figs. 1-6.) A species remarkable for the peculiar manner in which the spores are produced. There are a dozen or more in each ascus. Under slight pressure on the slide of the microscope the enveloping membrane bursts and separates from its peduncle which is of a firmer structure and bears some resemblance in size, shape and color to the spinules on the lamellae of A. spinulifer. The viscid pellicle of the pileus is separable when dry.

Commentary: The species (FIG. 23H) was originally described as Agaricus (Hebeloma) ascophorus (Peck 1872). It was never formally recombined into Hebeloma. Remarkably Peck’s original protologue describes the spores as being produced in asci. The examination of the holotype showed no sign of asci and spores with a clear germ pore, as well as the presence of pleurocystidia, all supporting Singer’s recombination in Pholiota. The presence of chrysocystidia (Singer 1969) could not be confirmed. According to Kauffman (1926) these “asci” were depicted by Peck (1872), plate 1.3. Kauffman wrote that Peck revised his view that these were spore-producing cells. It is not clear what Peck illustrated; nothing clearly corresponding to such structures could be found 90–100 years later in the material. Kauffman (1926:22) suggested these structures were formed by the species rather than by parasitic fungi, called them metalloid bodies, and described them as “sac-like with granular or blocked-out content, projecting very slightly above the basidia except when fully developed, apparently with a rather narrow pedicel below.” Peck (1889:139) considered A. ascophorus as “… merely a form of [P. highlandensis as “Flammula highlandensis”] with the squamules of the stem wanting or inconspicuous.”, thus anticipating – or causing – the later recognition of the taxon in Pholiota. Murrill (1917:197) followed Peck in the synonymization, but treated both in Gymnopilus under G. highlandensis. Kauffman (1926) referred to A. ascophora as “Flammula ascophora Peck” and, apparently also based on the presence of these metalloid bodies synonymized it with “F. highlandensis Peck”. Matheny et al. (2018) showed that types of P. carbonaria and P. highlandensis are included in the same species clade; P. carbonaria (Fr.) Singer has priority. Pholiota carbonaria and P. highlandensis are associated with burned ground (Matheny et al. 2018 and references therein). Burned ground was also the reported habitat for the type of P. ascophora. We have not studied types or other molecularly tested material of P. carbonaria and hesitate to synonymize P. ascophora with P. carbonaria based on literature.

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