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Title:  North American species of Hygrophorus / L.R. Hesler [and] Alexander H. Smith.
Author: Hesler, L. R. (Lexemuel Ray)
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SUBSECTION CAMAROPHYLLOPSIS 63 Fig. 15. H. subviolaceus 17516, 17995. AUSTRIA: Moser, Oct. 6, 1948 (Hesler 24128). OBSERVATIONS-Notes on Peck's type: spores 7-8(9) x 4.5-6 t, ellipsoid, to ovoid, smooth, yellowish in Melzer's reagent. Basidia 42-48 x 6-8 E/, 2- and 4-spored. Pleurocystidia and cheilocystidia none. Gill trama intricately interwoven, hyphae 3-7 ft broad. Cuticle of colorless, gelatinous hyphae. Clamp connections present on the cuticular hyphae. The pileus in the dried state is "sayal brown" to "verona brown." Although Peck (1901) and Murrill (1916) assigned H. subviolaceus to the section Hygrophorus (Limacium), it is clear that it is a Camarophyllopsis. Hygrophorus caerulescens Berk. & Curt., collected by Sprague in New England, is similar to H. subviolaceus in appearance; however, a study of the type H. caerulescens shows that, having a subparallel gill trama, it is a member of the section Hygrocybe; or possibly it is a member of section Hygrophorus in which, on revived sections, the hyphae of the gill trama do not regain their normal arrangement. The pellicle of the pileus may not always be bitter. Overholts sent us specimens from Pennsylvania which apparently had no distinctive taste but otherwise seem to belong here. In the 2-spored form from Washington, the taste was very slight. Since Peck did not mention the taste in his original account, we cannot be sure the type was bitter. Ricken's H. colemannianus is very likely the 2-spored form of H. subviolaceus. He gives the spore size as 8-9 x 6-7 pt which is exactly the same as in the 2-spored form collected in Washington.