As Agaricus temulentus, Colenso b 751 Indicated by Horak (197ib) to lack all the essential features of the Bolbitiaceae. The basidiospores are 8-10 x 5-6 µm, kidney-shaped, smooth and honey-coloured in ammoniacal solutions. The cheilocystidia are diverticulate and pleurocystidia absent. There is controversy concerning the true identity of Ag. temulentus.  Thus material in Kew collected at Glamis, Scotland by the Rev. J. Stevenson is Agrocybe arvalis (Fr.) Singer, yet material identified by M. C. Cooke and cited by Orton (in Dennis, Orton Si Hora, 1960) is in fact a member of the Tricholomataceae (see also Reid & Austwick, 1963).