White: Tylostomaceae of North America 441 



The single specimen of this species known is at Albany and is 

 inaccessible at the present time, so the above original description 

 has been quoted verbatim. 



IV. QUELETIA Fries. Ofversigt Kongl. Vetens. Akad. F6r- 



handlingar, Stockholm, 171. //. 4.. 1871 



This genus was established on a single species, and as yet no 

 others are known. It is very raie, having been reported from 

 very few localities. It was discovered by Dr. L. Quelet, at 

 Herimncourt, France, and has since been reported from the en- 

 virons of Rouen (Saint-Saens), and Pont de Sochaux, France. 

 It has been found only once in the United States, at Trexlertown, 

 Penn., by Mr. William Herbst, and was reported by Professsor C. 

 H. Peck, in his 46th report of the State Botanist. He is of the 

 opinion that this plant was introduced into this country in some 

 way with tan bark, on which it usually grows. 



1. Queletia mirabilis Fries, loc. cit. 



Peridium globose, 2.5-3.5 cm. high, 3-4 cm. in diameter, 

 fragile, easily separating from the stem, rupturing irregularly, of 

 a reddish-brown color : collar irregular, of the same substance as 

 the peridium : stem 6.5-8 cm. long, 1.5 cm. wide at the top, 2 

 cm. at the base, fascicular, reddish -brown, within and without, like 

 the peridium, solid, lacerate, fibrillose, particularly at the base: 

 capillitium very abundant and interwoven, forming with the spores 

 a felt-like mass, reddish-brown, single threads whitish-yellow, 

 thick-walled, hollow as shown by the truncated ends, septa rare 

 or wanting, 5-9 ^ wide, branches rather short, free ends rounded 

 and recurved : spores subglobose, coarsely waited, 4-6 ft in 

 diameter, some short-pediceled, inner portion breaking up and 

 issuing from the thin-warted coating which is then hyaline and 

 shrivelled. (PI. 38, f. 1-5.) 



Pennsylvania : Trexlertown, Herbst. On spent tan bark. 



Summer, after rains, forming circles. 



V. DICTYOCEPHALOS Underwood, gen. nov. 



Plants with the irregularly rupturing peridium closely attached 

 to the solid stem. Volva cup-like, persistent at the base of the 

 stem. Gleba composed of a mesh-like irregular tissue, in which 

 the capillitium threads are embedded. 



