37G Rev. M. J. Berkeley on Exotic Fungi. 



notes are appended to the several species in their place in the 

 Herbarium. It seems desirable that the record of so many 

 interesting species existing in a British collection should not 

 be confined to a foreign journal, and there is the greater rea- 

 son for giving the results of M. Klotzsch's labours in an Eng- 

 lish form, since the species in the Herbarium, which from its 

 richness and the extreme liberality of its possessor, may al- 

 most be regarded as national, appear frequently under per- 

 fectly different names, and in some instances the specific 

 names have been transferred from one species to another. I 

 have made corrections where they appeared necessary, and 

 have taken the opportunity of describing some species either 

 received subsequent to the completion of M. Klotzsch's revi- 

 sion or left by him undetermined. It has been thought right 

 to add descriptions of a few of the species collected by M. 

 Humboldt, where the specific phrases given in the c Synopsis 

 Plantarum aequinoctialium orbis novas' are too short. It has 

 been found almost impossible to mark the additions which it 

 has been thought right to make in any case to the descriptions 

 already published. I am anxious however to state that I have 

 no wish to rob the learned author of the slightest portion of 

 the praise which is due to his labours, or to put forth his de- 

 scriptions as my own. 



Agaricus. 



1. Agaricus (Leucosp. Clit. Rhizop.) rheicolor, Berk. Rhu- 

 barb-coloured. Pileus thin, striate, wrinkled in the centre, at 

 length umbilicate ; gills rather broad, adnato-decurrent, beau- 

 tifully connected by strong veins, their bases velvety. Stem 

 long, slender, more or less grooved, slightly thickened at the 

 base, clothed with fine velvety, obscurely fasciculate pube- 

 scence. 



Pileus scarce 1 inch broad, more or less wrinkled especially 

 in 7 centre, as in Ag. radicatus, from the contraction of the 

 substance of the pileus; margin grooved and striate. Gills 

 rounded, velvety at the base from running down for a very 

 short distance into the pubescence of the stem, most beau- 

 lung, so wie zu der wenigen im Linneischen Herbarium vorhandenen Pilzen, 

 nebst Aufstellung einiger auslandischen Gattungen und Arten, 1832. 



Fungi exotici e collectionibus Britannorum auctore Klotzsch, 1833. 



