title: Lentinellus herbarum, a rediscovered unclamped species.
abstract: The fungus first described as Lentinus flabelliformis var. herbarum has been found fruiting on dead Epilobium angustifolium stalks at La Chaise-Dieu (France), the first record since its original diagnosis. The basidiospore characters, trama and hymenium structure indicate the species belongs Lentinellus sect. Omphalodei (Hericiales), but the absence of clamps is a remarkable character, new for this genus. The new combination L. herbarum comb. nov. (syn. Lentinus flabelliformis var. herbarum) is made and a neotype designated. A key to the eight European taxa of sect. Omphalodei is included.
authors.affiliation: Geobotanisches Institut E. T. H., Zollikerstrasse 107, CH-8008 Zürich, Switzerland. moreau@geobot.umnw.ethz.ch
authors.forename: Pierre-Arthur
authors.initials: PA
authors.lastname: Moreau
authors.forename: Guy
authors.initials: G
authors.lastname: Garcia
authors.forename: Pierre
authors.initials: P
authors.lastname: Roux
mesh_terms: D031666:Epilobium / Q000382:microbiology*; D005602:France; D020074:Lentinula / Q000145:classification* / Q000254:growth & development / Q000302:isolation & purification / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D016533:Mycological Typing Techniques; D013172:Spores, Fungal / Q000648:ultrastructure