ened and subpersistent below. Stem slender, dark reddish brown, sub- 

 smooth, substriate with no trace of scales, white within, hollow with 

 central fibrils. Capillitium subhyaline, sometimes waxy with septa both 

 swollen and even. Spores 5 mic., strongly asperate. 



This little species' seems to be of a southern range, reaching me 

 only from Florida. The slender, very dark colored stem and the col- 

 ored peridium distinguish it from all related species. 



SPECIMENS ix OUR COLLECTION. 

 Florida, Mrs. Delia Sams, Mrs. M. A. Noble, Theo. L. Mead. 



(Tylostoma Giovanellae and Tylostoma Beccarianum, rare plants in Europe. 

 Tylostoma Wrightii of New Mexico and Tylostoma Wrightii of India, all imper- 

 fectly known to me, belong to this section, I think.) 



Group 6. 



The three following species are very close to each other (if not the same). 

 They are distinguished by their obese habits, pale color and the mouths which are 

 naked, very slightly protruding and usually not circular but elongated in form. 

 The plants usually do not have a single central mouth, as other species, but 

 many specimens develop several mouths, irregularly disposed. 



TYLOSTOMA VOLVULATUM (Plate 81). Peridium uncol- 

 ored, usually very pale, with a naked, slightly protruding, usually irregu- 

 lar mouth. Sometimes ( I am told) it develops more than one mouth, 

 though I have never noted such specimens. Stem obese, pale, usually 

 rough with adhering sand. Capillitium colored.^ Spores smooth, 

 5 mic. 



This species is well named and is often well marked by remains 

 of the stem volva adhering as a distinct collar at the base of the peridium 

 and also at base of stem as shown in Plate 81, Fig. 4. It is an abundant 

 plant in northern Africa and well represented in the museums of Paris 

 and Berlin. 



SYNONYMS. Tylostoma tortuosum (Fr. Syst. Myc. 3-43) much the prior 

 name, which was not adopted but referred to his synonymy by Dr. Hollos, no 

 doubt because it did not make a "new combination." Tylostoma volvulatum, 

 which is in general use, is a much better name for it. The following are also 

 synonyms according to Prof. Patouillard : Tylostoma Boissieri (Rev. Myc. T. 

 xv, f. 2), Tylostoma Barbeyanum (Bull. Bois. 1, 99). Also in my opinion Tylos- 

 toma Ruhmeriana (Hedw. "98, 288). 



SPECIMENS IN OUR COLLECTION. 

 Africa, collected by Schweinfurth and given us by Dr. Hennings. 



TYLOSTOMA CAESPITOSUM (Plate 80). Peridium uncol- 

 ored, pale, usually with several naked, irregular mouths. Stem obese, 

 colored, striate. Capillitium hyaline. Spores slightly granular. 



t The s'leba of this species is notably darker in color than that of most 

 Tylostomas and the Capillitium is distinctly colored, not "hyaline" as stated by 

 Petri. 



19 



