ADDENDUM. 



(Crowded out of the Stipitate Stereums. 



THE GENUS MYCOBONIA. 



This is a Thelephoraceous genus that has been confused with the Hydnaceae. 

 The hymenium borne on the lower surface has, under a lens, minute teeth-like 

 projections, which consist of bundles of sterile hyphae. (Fig. 713.) These "teeth" 



led Berkeley to class the plant 

 in the genus Hydnum an ob- 

 vious error, as all Hydnaceae 

 have the basidia and spores 

 borne on the teeth. At the time 

 Berkeley so referred it he ques- 

 tioned the reference. Spegazzini 

 was the first to note that the 

 teeth were sterile, and suggested 

 putting it in Hymenochaete 

 (Cfr. Sacc., 9, 211); but the 

 "teeth" have no resemblance or 

 analogy to the setae of the sec- 

 tion Hymenochaete. Then Pat- 

 ouillard discovered that it was 

 ''new genus," and called it 



Fig. 712. 



Fig. 713. 



Fig. 712 hymenium surface enlarged. Fig. 713 hymen 

 ium magnified. (Cut from Eng. & Prantl.) 



Bonia, afterwards, when this 

 was found to be preoccupied, 

 changed to Mycobonia. It is 

 probably best classed as a section of Stereum. Recently an American (Mr. Banker), 

 engaged in juggling the Hydnaceae, also proposed for it a "nov. gen." " Grandiniodes " 

 in blissful innocence, first, that the plant does not even belong to the general class of 

 plants that he was engaged in juggling, and that had he known the elementary, 

 ssential characters of a hydnaceous plant he would have known he had nothing to 

 do with this. And, second, had there been any occasion to call it a "gen. nov.," 

 the same thing had been done twice before, and a genus based on the same species 

 {"Hydnum" flavum). 



Fig. 714. 



Mycobonia flava. 



MYCOBONIA FLAVA (Fig. 714). Pileus glabrous, sessile, 

 attached by a reduced base or rarely with a short lateral stipe. Color 

 of dried plant, pale yellow when fresh. The old museum specimens 

 are reddish brown, under surface, paler yellowish brown. Hymenium 



11 



