logici, 1904, page 423 ).f I have never received specimens from any 

 other collector. 



TYLOSTOMA OBESUM (Plate 83). Peridium uncolored with 

 a raised fibrillose mouth. Cortex separating freely, leaving the periclium 

 smooth. Peridium with a marked collar at base. Stipe thick, obese. 

 Capillitium strongly colored. Spores smooth. 



Known from a single collection from Colorado. The type is at 

 Kew but a better specimen (Plate 83, Fig. 7) is in Ellis' collection at 

 New York. 



(Tylostoma fulvellum, a recently described plant of Europe, Tylostoma Mac- 

 Owani of South America and Tylostoma gracile, which I have been unable to 

 recognize, from United States, all evidently belong to this group.) 



Group 9. 



TYLOSTOMA GRANULOSUM (Plate 84). Pileus nncolorcd.t 

 Cortex of the nature of a sand-case, separating above, leaving the 

 pileus smooth, persistent at base of peridium. Mouth with a small 

 development of fibrils, usually torn and granular in appearance. Stipe 

 dark, striate-sulcate, usually rather short and thick. Sometimes numer- 

 ous mycelial fibrils adhere to stems as collected. Capillitium subhya- 

 line, with few septa, not swollen. Spores 5-6 mic.. granular. 



We refer to Tylostoma granulosum all collections we have seen 

 from Europe that do not have a tubular mouth. The European plants 

 all agree in the main characters, viz.: an uncolored peridium; the same 

 mouth surrounded at first by a slight development of fibrils which 

 usually from the impress of the sandy cortex are granular in appear- 

 ance and in old specimens usually disappear, and granular spores. The 

 plant varies chiefly in stature. The usual form as shown, Plate 84, 

 Fig. 4, corresponds to Leveille's figure. Sometimes it is more obese, 

 Plate 84, Fig. 3. and rarely it is more slender. Plate 84. Fig. 2. The 

 slender form appears to me to be the plant that has been figured under 

 the name Tylostoma Petrii. The capillitium of the latter form, under 

 the microscope, is slightly colored. Tylostoma granulosum is widely dis- 

 tributed and fairly frequent in Europe, but I have seen no specimens 

 from England. In Italy it appears to be the most common species. 



t Rev. Bresadola kindly named the plant Tylostoma Lloydii and sent me a 

 diagnosis for publication in Mycological Notes. After filing it for a couple of 

 years I returned it to Rev. Bresadola statins it would embarrass me to publish it. 

 There will be no more "Lloydii's" published in Mycological Notes. 



t The word "brunneo" in Saccardo seems to have been added. It is not in 

 the original description and Leveille's drawing and specimens are uncolored. The 

 plant of Europe is in my observation always uncolored. and I have not the source 

 of the opinion so prevalent that Tylostoma granulosum has a colored peridium. 

 as shown in Petri's recent drawings. I am well satisfied there is no species in 

 Europe with a fibrillose mouth and a colored peridium. 



Vittadini (usually very accurate in his work) gave an illustration of Tylos- 

 toma granulosum under the name Tylostoma mammosum (which has an entirely 

 different mouth), and his misnamed picture has been copied by Fischer in Engler 

 and Prantl as Tylostoma mammosum. It belongs to a different section of the 

 genus. At the British Museum I found seven exsiccatae (mostly Italian) with 

 specimens of Tylostoma granulosum misnamed Tylostoma mammosum. 



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