Hebeloma odoratum - A non-current Hebeloma species

According to our data Hebeloma odoratum is not the name of a current valid species of Hebeloma. Our database has records for the following similar names

Full name: Hebeloma odoratum Velen. (1920)
Published: Ceske Houby: 394 (1919) ["1920"]
Taxonomic status: Heterotypic synonym of H. sacchariolens
Types: CZECH REPUBLIC: Mnichovice (49.5612°N, 14.4245°E, alt. approx. 590 m a.s.l.) on grassy soil in woodland, 1918, J. Velenovsky (Lectotype. herbarium acc. no. PRC B78a, HJB1000243). Lectotype designated by Beker et al., Hebeloma (Fr.) P. Kumm.: (2016) page 622 (MBT202537).

The lectotype was designated by Beker et al. 622 (2016), MBT202537. The material in a bottle of in alcohol/formaldehyde is labelled as Mnichovice 1918 and hence is very likely to be original material.

Original diagnosis: Pileo 3-4 cm diam., succose subcrasse carnoso, regulariter convexo, centro zona prominenti ornato, margine paulisper involuto, levi, glabro, albo, solum vertice alutaceo et ibi levi et viscido. Stipite pilei diam. paulum longiori, subtenui, 3-5 mm. crasso, haud incrassato, potius basi angustato, solido, firme elastico, levi, glabro, lucido, candido, solum basi paulisper subfusco, apice subtiliter granuloso. Lamellis distantibus, tenuibus, latissimis, postice rotundato-liberis, acie denticulatis, argillaceo-ochraceis, facie transverse venulosis. Sporis luteis, ovatofusoideis, inaequilateralibus, 10-12 μm. Cystidiis numerosis, longis, crasse cylindraceis, rotundatis, lageniformibus, haud raro etiam curvulatis et deformatis. Odor penetrans, valde amoenus. In vicinitate urbis Mnichovice in latebris silvaticis graminosis sat distributum, augusto-septembri. Colore candido et odore amoeno conspectum.

English translation: Pileus 3–4 cm diam., juicy, thickish, fleshy, regularly convex, at centre with prominent zones, with weakly involute margin, smooth, glabrous, white, only at centre pale brown, and there smooth and viscid. Stipe only slightly longer than diameter of pileus, somewhat slender, 3–5 mm thick, not broadened, but rather attenuated, solid, firm, elastic, smooth, glabrous, shiny, white, only somewhat brown at base, apex delicately granulose. Lamellae distant, thin, very broad, rounded-free, with denticulate edge, leather-coloured ochraceous, sides transversally veined. Spores yellow, ovate-fusiform, inequilateral, 10–12 μm. Cystidia abundant, long, wide cylindrical, rounded, lageniform, not rarely recurved or deformed. Odour penetrating, strongly fragrant. In the vicinity of Mnichovice widely distributed in hidden places in grassy forests. Distinct on account of the white colour and fragrant odour.

Commentary: The ‘original diagnosis’ above is the translation into Latin from the original Czech by Pilat, Opera Bot. Čechica 6: 135 (1948). We made a morphological study of the lectotype; unfortunately the method of storage does not allow for a molecular study. The protologue mentions the brown centre to the pileus and the smell. We measured the spores to be 10.4 × 6.0 μm on average. This is: = Hebeloma sacchariolens Quél.