Full name: Hebeloma kalmicola Murrill (1917)
Published: N. Amer. Fl. 10 (3): 218 (1917)
Taxonomic status: This is a Pholiota.
Notes: Current name: Pholiota kalmicola (Murrill) A.H. Sm. & Hesler, The North American species of Pholiota: 90 (1968).

Types: UNITED STATES: Virginia: Apple Orchard Mountain near Bedford (approx. 37.3343°N, 79.5231°W, alt. approx. 300 m a.s.l.) on mossy stump under Kalmia latifolia, 25 Oct. 1916, W.A. Murrill (Holotype. herbarium acc. no. NY 814905, HJB1000291).

Diagnosis: Pileus convex, not fully expanding, slightly depressed at the center with age, not umbonate, gregarious, 2.5-3.5 cm. broad; surface moist, subglabrous, uniformly yellowish-white to cream-colored, margin entire, concolorous, not striate; context thin, with slightly unpleasant taste and no odor; lamellae adnexed or sinuate, very broad, of medium distance, thin, yellowish-white to dirty-white, entire and concolorous on the edges; spores ellipsoid, smooth, pale-yellow, uniguttulate, about 12 X 7 μ; stipe slender, cylindric, equal, fibrillose, slightly darker than the pileus, hollow, 5 cm. long, 3 mm. thick.

Commentary: Our analysis of the holotype reveals smooth ovoid to amygdaloid spores (8–10 × 4.5–5.5 µm), thick-walled, with a clearly visible germ pore. The cheilocystidia and pleurocystidia are similar, small, ventricose, occasionally utriform. The spore measures given here agree with those of Murrill (1917). Hesler and Smith (1968) might have studied another portion of the material. They give different spore measures and point out the difference from Murrill’s measurements. The ITS sequence traces obtained from the holotype were not properly readable due to admixture with another sequence, but a sequence similar to the isotype sequence of P. stratosa (MN209779, Tian & Matheny 2021) might be present in the mixture. The spore size of P. stratosa (Hesler and Smith 1968) is similar to the spore size given in Murrill’s (1917) description of P. kalmicola. Comparative type studies are needed to investigate a possible synonymy. Pholiota kalmicola would have priority over P. stratosa. The type sequence of P. stratosa was included in phylogenetic reconstructions of Tian and Matheny (2021) as well as in our analysis. It was resolved in the P. subgen. Flammuloides clade.