Year: 2001
Type: article
Abstract: Nomenclatural and taxonomical notesare given on species ofAgaricus section Arvenses, together with a key to the accepted species occurring in the Netherlands and adjacent regions. Two new combinations,Agaricus osecanusvar. squarrosipes (Bon & Collin) Nauta and Agaricus urinascens var. excellens (F. Møller) Nauta are made. Anew variety of Agaricus sylvicola, var. squarrosus Nauta, is described. Agaricus section Arvenses Konr. & M., Agaricales I (1949) 104 Surface of pileus yellowish on handling, especially on drying; Schaeffer-reaction on pileus orange, rarely doubtful; stipe annulate; annulus persistent, rarely fragile, with rem-nants ofuniversal veil as thick flocks or warts on underside;context not discolouring or dis-colouring slightly yellowish or orangeto pinkish in cut basidiocarps; KOH-reaction in con-text usually positive and yellow; cheilocystidia present, catenate, forming sterile layer around lamella-edge (absent in some taxa not occurring in the Netherlands); spores> 5.5 pm. KEY TO THE SPECIES OCCURRING IN THE NETHERLANDS AND ADJACENT REGIONS 1. Pileus with yellow to brown scales onpaler background; stipe oftenrooting; cheilocys-tidia in protuberant clusters and frequently of irregular form; average spore size 8.2-
Author: Marijke M. Nauta
Language: English
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W754836725