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Page number:1106 
Remarks (internal):Clitocybe gruberi was described from a single basidioma from Idaho (Smith 1944). In Smith's discussion of the species he commented that "the long cylindric spores, the color of the carpophore [pileus pale yellow], and the cheilocystidia are an unusual combination of characters in Clitocybe." After studying more collections from New Mexico Bigelow and Smith (1973) erected Cantharocybe to accommodate this species that they concluded was not a Clitocybe, their justification formulated from the above observations made by Smith. The Bigelow and Smith study also provided an updated description of the species that included illustrations of spores and cheilocystidia, but they did not indicate whether the illustrations were from the type or supplemental material. We provide here detailed illustrations from the holotype (Figs. 10-13).
With two exceptions our study of the type material agrees with the protolog. Smith in the protolog mentioned for the pileus surface that "hyphal tips present as pilocystidia, the end cell not differentiated except for a narrow, short proliferation, the cells 20-35 x 4-7 µm, proliferation 10-15 µm long and 2-4 at the base ...". We could not confirm the presence of such structures in our examination of the type, in our examination of supplemental collections, and these pileocystidia were not mentioned in the redescription of C. gruberi by Bigelow and Smith (1973). Second, Smith stated that clamp connections were absent, but we have confirmed their presence, as did Bigelow and Smith in their later description.

 
Description type:Non-original description 
Description:Cantharocybe gruberi (A.H. Sm.) H.E. Bigelow & A.H. Sm., Mycologia 65:485. 1973. Figs. 10-13
Clitocybe gruberi A.H. Sm., Mycologia 36:245. 1944
Laccaria gruberi (A.H. Sm.) Singer, Lilloa 22:176. (1949) 1951.
Spores (13.5)14-15(16) x 5.5-6 µm (mean = 14.73 x 5.63 µm, Q = 2.33-2.8, mean Q = 2.63), narrowly elliptic to oblong in profile and face view, smooth, thin-walled, hyaline, inamyloid. Basidia 40-50 x 10-12 µm, four-sterigmate, clavate, hyaline. Cheilocystidia present on both the main lamellae and also on the lamellar ridges/reticulum that extend onto the stipe; those on the main lamellae approximately lecythiform but sometimes with a mucronate apex, basal portion clavate to ventricose and narrowing toward the base, upper portion extending into an elongated neck with or without a rounded capitulum, entire length 40-47 µm, neck 10-20 x 2-3 µm, capitulum to 4 µm wide, smooth, thin-walled, hyaline; those on lamellar ridges of stipe of a similar shape but much more numerous and almost forming a continuous layer, often with a longer apex, entire length 40-60 µm, 6-10 µm where widest, apex 8-43 µm long and 2-3 µm wide, mainly capitate, some cystidia cylindrical and appearing filamentous, 60-85 x 3-3.5 µm, cystidia rarely with a secretion. Hyphae of lamellar trama parallel, 3-8 µm wide, cyclindrical, hyaline, with slightly thickened walls when viewed in KOH, the hyphae near the lamellar edge are narrow and resemble the subhymenial hyphae. Subhymenium a layer of interwoven hyphae 10-20 µm wide, hyphae 2.5-3.5 µm wide, cylindrical, slightly refractive, hyaline. Hyphae of pileus surface a cutis of appressed or slightly interwoven hyphae, 4-8 µm wide, smooth, thin-walled, pale yellow, slightly translucent-refractive; pileocystidia not seen. Hyphae of pileus trama to 10 µm wide, hyaline. Hyphae of stipe surface 3-5 µm wide, appressed to slightly interwoven, smooth, thin-walled, hyaline, with scattered caulocystidia like those of the lamellar edge. Hyphae of stipe trama up to 12 µm wide, hyaline. Clamp connections present but not at every cross wall.
Holotype collection.. IDAHO: Jul, May 1943, W.B. Gruber 26 (MICH).
 
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