Published: Ann. Rep. N.Y. St. Mus. 49: 32 (1897) ["1896"]
Taxonomic status: Heterotypic synonym of H. mesophaeum
Types: UNITED STATES: New York: Albany County, Bethlehem, Delmar (approx. 42.62°N, 73.83°W, alt. approx. 65 m a.s.l.) on sandy soil in heathland, Oct. 1895, C.H. Peck (Holotype. herbarium acc. no. NYS-F-001411, HJB1000087).
Diagnosis: Pileus fleshy but thin, hemispherical or convex, obtuse or rarely with a small inconspicuous umbo, slightly viscid when moist, glabrous or slightly silky on the margin from the remains of the veil, pale ochraceousyellow, sometimes with a slight reddish or tawny tint in the center, flesh whitish; lamellae thin, close, adnate, at first whitish. then subcinnamon; stem slender, stuffed or hollow, whitish, fibrillose, slightly mealy or pruinose at the top; spores elliptical, .0004 to .00045 in. long, .00024 broad [10.2-11.4 x 6.1 µm]. Pileus 8 to 16 lines broad [20.3-40.6 mm]; stem 1.5 to 2 in. long [38.1-50.8 mm], 1 to 2 lines thick [2.5-5.1 mm]. Sandy soil in heathy places. Delmar. October. This small species belongs to the section Pusilli. The pileus is sometimes longitudinally rimose, and sometimes split on the margin in such a way as to cause it to appear stellately lobed. Sometimes a colored band appears on the stem by reason of the spores lodging on the slight adhering remnants of the veil. A slight radish-like odor is perceptible when the pileus is cut or broken. The plants grow gregariously and bear some resemblance to Naucoria semiorbicularis, but the color of the spores and of the mature lamellae abundantly distinguishes the species.
Commentary: This species belongs to Hebeloma sect. Hebeloma, owing to the small ellipsoid to ovoid yellow spores and the ventricose to lageniform cheilocystidia. The morphology, together with the ITS sequence, support this species as a later synonym of H. mesophaeum. Hence this is: = Hebeloma mesophaeum (Pers.) Quél.
All current species: aanenii | adherens | aestivale | albidulum | alboerumpens | albomarginatum | album | alpinicola | alpinum | ambustiterranum | aminophilum | ammophilum | angelesiense | angustilamellatum | anthracophilum | arcticum | asperosporum | aurantioumbrinum | australe | avellaneum | bellotianum | birrus | bulbiferum | catalaunicum | caulocystidiosum | cavipes | celatum | cinnamomeum | circinans | cistophilum | citrisporum | cohaerens | colvinii | crustuliniforme | cylindrosporum | danicum | discomorbidum | duracinoides | eburneum | echinosporum | erebium | erumpens | excedens | flavidifolium | fuscatum | fusisporum | geminatum | grandisporum | griseopruinatum | harperi | helodes | hiemale | ifeleletorum | immutabile | incarnatulum | indicum | ingratum | ischnostylum | islandicum | kelloggense | lactariolens | laetitiae | laterinum | leucosarx | limbatum | lindae | louiseae | luchuense | luteicystidiatum | lutense | mackinawense | magnicystidiatum | marginatulum | matritense | mediorufum | melleum | mesophaeum | minus | monticola | nanum | nauseosum | naviculosporum | neurophyllum | nigellum | nitidum | nothofagetorum | odoratissimum | olympianum | pallidolabiatum | paludicola | parcivelum | parvicystidiatum | parvisporum | pascuense | perexiguum | plesiocistum | populinum | porphyrosporum | praeolidum | psammophilum | pseudoamarescens | pseudofragilipes | pubescens | pumilum | pungens | pusillum | quercetorum | radicans | radicosoides | radicosum | rostratum | sacchariolens | sagarae | salicicola | sarcophyllum | serratum | sinapizans | sordescens | sordidulum | spetsbergense | sporadicum | subaustrale | subconcolor | subfastibile | subtortum | syrjense | theobrominum | vaccinum | velatum | velutipes | vesterholtii | victoriense | vinosophyllum | viscidissimum | youngii
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