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Fungus, placing the dimidiate, woody forms in Agaricus. 
Nineteen years later Dillenius (Caz. Pl. Gzss. 1719) pro- 
posed Amanzta for the stalked gill fungi but he still placed 
the sessile, dimidiate ones in Agaricus with the woody pore 
fungi. Micheli (Vov. Pl. Gen. 1729) adopted practically 
the same arrangement, but he restored the older generic name 
of Fungus for the stalked forms and dropped the name 
Amanita. Linnaeus in 1737 (Genera Plantarum) seems to 
have been the first to recognize the presence of lamellae as a 
character of primary importance. In all of his writings he 
combined all of the stalked and dimidiate lamellate fungi in 
a single genus, but in choosing a name for it he very unfor- 
tunately selected Agaricus. This name had previously only 
been used for sessile, usually woody and pore-bearing forms 
and for the very few known species of sessile gill fungi that 
had been associated with them. It had never included any 
of the central-stemmed species. According to modern ideas 
it is clear that he should have chosen Amanzta or Fungus 
and not Agaricus as the name for the gill fungi. In fact, 
this was the opinion of most of his contemporaries. Battara, 
Haller, Adanson, and La Marck all refused to accept the 
innovation. As late as 1806, Roussel (Flore du Calvados) 
continued to use the name Agaricus exclusively for the 
sessile woody pore fungi. Logically and historically this is 
evidently its proper usage. In the first edition of the Spectres 
Plantarum (1753) Linnaeus recognizes 27 species of 
Agaricus, only three of which are sessile. According to a 
strict historical interpretation one of these, Agaricus guer- 
cinus, should be regarded as the type, and the name would 
thus be lost for any group of the gill fungi. That clause 
of the code, however, which provides that where economic 
species are included in a genus one of these must be selected 
as the type, enables us to designate Agaricus campestris as 
the type of the genus as taken in the Linnaean sense and thus 
to continue the usually accepted modern usage. 
Two years after the appearance of the Species Plantarum, 
Battara (1755) published an important work, Fungorum Agri 
