Coll. ES 2015-06-15
© E. Skific | | | | | |
Helvella griseoalba N.S. Weber, Michigan Bot., 11: 162 (1972).
Basionym Helvella griseoalba N.S. Weber, Michigan Bot., 11: 162 (1972).
Diagnosis Apothecium 1.5-4 cm latum, usque 1.2 cm profundum, cupulatum vel planum. Hymenium dilute griseum vel cinereum, aequatum. Pagina sterilis colorata similis hymenio, vel versa stipitem palescentem; impolita vel pubescens; costata, costae albae vel griseae, rotunda. Margo integer, curvus vel rectus. Stipes absens vel praesens, 1-2 cm longus, 7-13 mm crassus; albus; costatus, costae rotundae, interdum lacunosae; impolitus. Sporae (15-) 16-18 × 10.5-12 µ, oblongae vel ellipsoidae. Hymenium 210-260 µ crassum. Paraphyses apice usque 5-10 µ clavato-incrassatae, hyalinae. Asci 12-15 µ crassi. Excipulum 70-110 µ crassum, texturae angularis cum hyphis et fasciculis hyalinis vel fuscis. Medulla 100-500 µ crassa; texturae intricatae, hyphae hylinae.
Specimen typicum in Herb. Univ. Mich. Conservatum est; sub silvis frondiferis, Grapevine Point, Douglas Lake, Univ. Mich. Biol. Sta., Cheboygan Co., Michigan, 10 June 1968, leg. N.J. Smith 982.
Type N.J. Smith 982 (MICH) - holotypus
MycoBank 315077
Literature
Landeros F., Iturriaga T., Rodríguez A., Vargas-Amado G., Guzmán-Dávalos L. 2015. Advances in the phylogeny of Helvella (Fungi: Ascomycota), inferred from nuclear ribosomal LSU sequences and morphological data. Revista Mexicana de Biodiversidad, 86: 856-871.
Skrede I., Carlsen T., Schumacher T. 2017. A synopsis of the saddle fungi (Helvella: Ascomycota) in Europe – species delimitation, taxonomy and typification. Persoonia, 39: 201-253.
Weber N.S. 1972. The genus Helvella in Michigan. The Michigan Botanist, 11 (4): 147-201.
Classification: Helvellaceae, Helvella
Created on 12/02/2021.
Updated on 14/08/2023.
