164 



Of the specimens quoted, those in Plowright's Sphaeriacei have a 

 ^hort. obtuse, hyaline appendnge (2-2| // long), at each end of the spo- 

 ridia. Tliose issued l>y Kelim, Sydow, Spegazzini, mid Ellis, are not 

 appreciably appendiculate. 



The Sphceria Garficium, Schw. can hardly lie more than a var. of 

 R. a,(jni1<i. tin 1 perithecia being scattered, and eacli seated on a sepa- 

 rate, orbicular patch of densely interwoven subiculmn, resembling ait 

 orbicular brown Corticium. 



R. purpiireo-fiisca, (Schw.) 



Spherria purpureo-fusca, Schw. Syn. N. Am. 1499, 

 Byssosphcrrni purp-ureo-fusca, Schw. in Cooke's Synopsis, 2602. 



Subiculum tomentose, rhacodium-like, purplish-brown, extensively 

 effused, and at first covering the perithecia, which however are soon 

 eespitose-erumpent or longitudinally-seriate, very large, (much larger 

 than those of R. aqu'tla), globose and clothed, except around the osti- 

 olum, with a delicate brownish-purple tomentum. Ostiola black, con- 

 ical, bare and sometimes sublateral. 



On oak limbs, Bethlehem, Pa. 



R. megalocarpa, (Plovvr.) 



Sphceria megalocarpa, Plowr. Grev. VII, p. 75. 

 Rosellinia megalocarpa, Sacc. Syll. 952. 



Perithecia superficial, very large, l|-3 mm. diam., spherical, dull 

 black, slightly rough, becoming rugulose with age. Ostiola very 

 minute, scarcely prominent, surrounded by a paler areola. Asci cylin- 

 drical or clavate, 70-130x10-15 //, with numerous, flexuous par- 

 aphyses. Sporidia dark l)roAvn, oval, coloi-less when young, then 

 binucleate and brown, 12-15 x 3-5 t u. 



On bark of dead maple, California (Harkness). 



In the specimen sent us by Dr. H.. the perithecia are crowded, 

 1|-2| mm. diam., clothed below with brown, strigose hairs, which 

 also form a subiculum, mostly collapsed. Ostiola papilliform, paler. 

 Asci (p. sp.) cylindrical, 75-80 x4J-5 //. Sporidia uniseriate, lying 

 end to end and not overlapping, oblong, brown, 2-nucleate, 10-12 x 



3|-4 fJL. 



R. imposita, (Schw.) 



Sphfzria imposifa, Schw. Syu. N. Am. No. 1503. 

 Byssospharitt imposila, Cke. Synopsis, 2610, 



Perithecia large, scarcely immersed, of a broNvn color, rugulose, 

 globose, scattered or seriate and subaggregated, or even subconfluent. 

 seated on a scanty, longitudinally effused, brown subiculum. Ostio- 

 lum subconic-papillate. 



