Stemonitis. 87 



(Type in Herb. Berk., Kew, n. 10S41.) 



On twigs, herbaceous stems, ferns, &c. 



Britain (Bardon) ; Germany. 



The pcridium is sometimes ahnost white with a silvery sheen, 

 at others brown. From 4 — 6 y. high. Much shorter and not 

 so densely crowded as S. fnrnginca. Quite distinct from S. 

 2Mlcherrima, B. and C. 



(Rostafinski's Synonyms.) 



Stcmonitis 2^ulchcUa, Bab., Trans. Linn. Soc, cfr. Berk., A. 



and M. (1841), p. 431, t. 12, f. 11 (1839). 

 Stcmonitis tencrrima, Curtis, Sill. Journ., 1. c, p. 849 (1848). 

 Stemonitis tcnerrima, B. and C, Grev., n. 373 (1873). 



Stemonitis herbatica, Peck. 



Sporangia densely gregarious, stipitate, springing from a thin 

 hypothallus, sub-cylindrical, wall evanescent ; stem usually 

 shorter than sporangium, thin, blackish; spores in the mass 

 hroum ; columella reaching nearly to apex of sporangium ; 

 capillitium dense, peri2Jhcral meshes not larger than diameter of 

 spores, threads sometimes furnished with a few short, free ends ; 

 spores globose, very minutely tvartcd, 8 — 9 /x diameter. 



Stemonitis herlatiea, Peck, 26th Report State Mus., N. Y., 

 p. 75; Sacc, Syll., vii., 1, no. 1367. 



(Authentic specimen from author.) 



On living leaves, stems, &c. United States. 



Often in scattered, small, densely crowded clusters, 5 — 8 mm. 

 high. Allied to S. ferriiginea in the colour of the spore-mass, 

 and in the small peripheral meshes of the capillitium, differing 

 in the very minutely warted spores. 



Stemonitis tubulina, A. and S. 



Aethalium at first white, soft, 1|— 2 in. broad, 4—6 lines 



high, orbicular, rarely sub-oblong, basal membrane stout, silvery, 



pellucid, iridescent, easily removable from the substratum; 



surface very smooth, shining, with hemispherical warts above, 



