164 



Of the specimens quoted, tliose in Plowright's Spliseriacei have a 

 short, obtuse, hj-aline appendage (2-2^ ix long), at each end of the spo- 

 ridia. Those issued by Rehm, Sydow, Spegazzini, and Ellis, are not 

 appreciably appendicnlate. 



The Sphoeria Corticium, Pchw. can hardly be more than a vaj-. of 

 S. aquila, the perithecia being scattered, and each seated on a sepa- 

 rate, orbicular patch of densely interwoven subiculum, resembling an 

 orbicular brown Corticium. 



R. purpureo-flisca, (Schvv.) 



SphiErid purpureo-fuica, Schw. Syn. N. Am. 1499. 

 Bysso^phixria purpureo-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 

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

 than those of ^. aquila), 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, (Plowr.) 



SphcBria megalocarpa, Plowr. Grev. VII, p. 73. 

 Rosellinia viegalocarpa, Sacc. Syll. 952. 



Pei-ithecia 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 cyhn- 

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

 aphyses. Sporidia dark brown, oval, colorless when young, then 

 binucleate and bi-own, 12-15 x 3-5 [i. 



On bark of dead maple, California (Harkness). 



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

 1^-2^ mm. diam., clothed Ijelow with brown, strigose hairs, which 

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

 Asci (p. sp.) cylindrical, 75-80 x4|-5 /i. Sporidia uniseriate, lying 

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



3M/^- 



R. imposita, (Schw.) 



SphcEria imposita, Schw. Syn. N. Am. No. 1503. 

 Byssospharia imposiia, Cke. Synopsis, 2610, 



Perithecia lai'ge, scarcely immersed, of a bi'own color, rugulose, 

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

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

 lum subconic-papillate. 



