Full name: Hebeloma subsacchariolens A.H. Sm., V.S. Evenson & Mitchel (1983)
Published: The Veiled Species of Hebeloma in the Western United States: 94 (1983)
Taxonomic status: This is a Hebeloma but we have not been able to unambiguously determine the species.
Notes: Nom inval. (Art. 39.1 - Melbourne).

Types: UNITED STATES: Colorado: Elk Camp, Burnt Mountain, Pitkin County. (approx. 39.1875°N, 106.9352°W, alt. approx. 3000 m a.s.l.) in coniferous, subalpine woodland under Abies sp. and Picea sp., 3 Sep. 1979, A.H. Smith (90215) (Holotype. herbarium acc. no. MICH 60204, HJB1000539).

Diagnosis: Pileus + 4.5 cm broad, broadly convex, surface dry and under a lens thinly matted-fibrillose, or near the margin streaked with aggregations of fibrils, the edge decorated with patches of pale buff veil fibrils; disc + pale dull brown, margin at first grayish brown. Context thin, white; odor fragrant, taste bitter but soon fading. KOH on cuticle no reaction: FeSO4 staining the base of the stipe green instantly. Lamellae broad, subdistant, adnate, becoming ventricose, pale dull tan; edges eroded but neither beaded nor spotted. Stipe + 6 cm long and ~ 1 cm thick, soon hollow; surface dark tan below, paler near apex, at first with a thin coating of pale buff fibrils from the veil but no annular zone or zones evident. Spores 10-14 x 6.5-8.5 (10) μm, smooth, clay color in KOH; shape in profile view inequilateral and many with a snout, in face view broadly elliptic to subelliptic or subglobose; pale reddish in Melzer's (weakly dextrinoid); often with a large central globule (as mounted in KOH). Hymenium.-Basidia 4-spored, 32-40 x 9-14 μm clavate, containing globules, in mass reddish orange in Melzer's. Pleurocystidia none. Cheilocystidia variable: basically with a ventricose area midway toward base or near the base, neck usually finally greatly elongated and either tubular or the walls flexuous; apex obtuse to subcapitate; yellowish to pale clay color or merely hyaline as revived in KOH; elongate cells (filamentous or cylindric) 38-70 x 4-6 μm, the fusoidventricose cells 31-60 x 6-12 x 4-6 μm. Lamellar and pilear tissues.-Cuticle of pileus an ixocutis of appressed hyaline 2.5 μm wide and hyaline in KOH, clamped. Hypodermium of inflated hyphal cells (up to 30 μm more or less but the tissue essentially hyphoid, rusty brown and with distinct incrustations as revived in KOH. Tramal hyphae reddish in Melzer's but soon fading to ochraceous.

Commentary: Unfortunately we have been unable to generate any DNA sequence from this material. Based on a morphological analysis this is a Hebeloma but not one with which we are familiar. Given the lack of sequence data and that this is an invalid name, we prefer to wait until we see further material of this taxon before taking any further action.