713 



H. Desmazierii, Duby, Hyst. p. 42, tab. II. fig. 22. 



Amphigenous. scattered, innate, ovate, convex, longitudinally 

 striate, very black and shining, covered by the thin epidermis to which 

 it is closely adnate; lips closed so as to leave a scarcely discernible 

 crevice between them. Asci broad-clavate, sessile, paraphysate, 

 8-spored. Sporidia inordinate, oblong or clavate-oblong, hyaline, con- 

 tinuous, 15-22 x 2J-3 fji, rather narrower and more acute below. 



On leaves of Pinus Strobus, London, Canada (Dearness), on pine 

 leaves, New York (Peck & Gerard). 



H. conigeimni, (Pers.) 



Hysterium conigenum, Pers. Syn. p. 102. 

 Hypoderma conigenum, Cke. Hndbk. II, p. 762. 



Perithecia erimipent, small, shining, elliptical or elongated, thin: 

 lips whitening out, broadly open. Asci clavate, rather long-stipitate, 

 90-100x12-14 /2, with filiform paraphyses curved above, 8-spored. 

 Sporidia bacillary-fusoid, often curved, 20-22 x 2|-3 p, pluriguttulate, 

 hyaline. 



i 



Rather rare, on cones of pine trees, Bethlehem, Pa. (Schw.). 



Species imperfectly known. 



H. plantarum, (Schw.) 



Hystertum plantarum, Schw. Syn. Car. 255. 

 Hypoderma plantarum, Sacc. Syll. 5805. 



Innate, linear, smooth, becoming black; lips thin, subflexuous, 

 forming a narrow ridge along the apex of the perithecium. 

 On dead stems of Monotropa, North Carolina (Schw.). 



Differs from H. conunnne in its elongated form: the long, narrow 

 lips slanting upwards like the roof of a house. The specc. in Herb. 

 Schw. are without fruit. 



LOP HO DERM HIM, Chev. 



Flore de Paris. I, p. 436. 



Perithecia mostly on pale spots on the stems or leaves, innate- 

 erumpent, elongated, mostly simple, sometimes forked, opening by a 

 longitudinal cleft along the middle. Asci clavate, mostly subacute at 

 the apex, 8-spored, with the paraphyses mostly hooked or spirally 

 coiled at the tips. Sporidia filiform, continuous, nucleate, hyaline, 

 lying parallel, nearly as long as the asci. 

 90 



