HTSTEBIOGEAPHIUM. 29 



Terj- obtuse, slit narrow; as.i more cr le^^s cylindrical, 

 slender, S-spored ; spores uniseriate or sometimes with an 

 approach to a hiseriate arrangement above, elliptical, ends 

 obtnse. constricted at the middle, 5-septate then muriform, 

 clear olive-brown ^hen mature, 17-21 X 7-10 /i; paraphyses 

 slender, branched and tinged yellow towards the apex. 



H.islerium Sousselii, De Xotaris, Pir. 1st., p. 19; Cke., 

 Hdbk., p. 7.JS. 



On old weathered pine plants, &c. 



Eeadily distinguished by the narrow, cylindrical asci, and 

 the smull. few septate, constricted spares. 



Specinjen examined from Fuckel's Fung. Ehen., exs. 

 n. 751. 



Hysterographimn fraxini. De Xot., Pir. Ister., 

 p. 22; Eehm, Krypt-Flora, Hvst., p. 10; Succ, :>vl!., ii. 

 n. .5758. (figs. 32-33, p. 22.) 



.■? .altered, or more frequently closelv g-regarious, lying at 

 all angles, black, hard, erumpent, elliptical, ends usually 

 obtuse, sometimes rather acute, lips rounded and obtuse, slit 

 narrow, elongated, li— 2^, mm. Lng by 1 mm. broad; asci 

 broadly cylindric-clavate, apex rounded, base short, .-tout, 

 thick- walled, 8-spored; spores elliptical, ends obtuse, scarcely 

 or not at all constricted at the middle, about 5-septate then 

 muriform, olive-brown at maturity, 35-45 X 1-5-20 fi; para- 

 physes slender, Iranched and tinged with brown at the 

 apex. 



Hygterium j'raxtnt, Persoon, ."^ynops. Fung., p. 0^; Cke., 

 Hdbk., p. 750, tig. 350. 



On dI•^- branches of ash, has also occurred in this country 

 or elsewhere, on hazel, walnut, privet, beech, lilac, and 

 Viburnum. 



Distinguished from H. ehngatum by the ascophores not 

 being aggregated on a black stain, and by the spores having 

 fewer septa, ends very obtuse, and not constricted at the 



middle. 



*• Sj^/o)-f8 9-11-se-ptate. 



Hysterographium elongatum. Corda, Icones., v. 

 p. 77, t. ix. fig. 62; Sacc, Syll., iJ. n. 5759; Eehm, Krypt.- 

 Flora, Hvst., p. 19. 



Giecrarious, seated on an effused blacki.su stain fonned by 



