SPH^]ROTHE(l\, Lev. 



Ann. Si:i. Nat. Stries III, Tome XV, p. 138. 



Peritlioc'ia coiitaiiiiiiy only one asciis. Appciidaa-os siiiijilc tliroa<ls 

 not unlike tlio nivcolimn with wliidi tlioy are rro(iuontly intei-wovcn. 

 Athens suhorhicular, usually containing eight sporidia, A'crv rarely 

 two asei have been oli.-ierved. 



S. pruinosn, C. & P. Krysi])Iiei of the U. S. in Journ, Bot. 1872. 



IIy]iogeiious. ^Mycelium thin. eHuse, persistent. Perithecia scat- 

 tered, 80-100 // ; cell-reticulations small, apjtendages fcAv, siin[)lc, rigid, 

 even, hyaline, 3-4 tinies the diameter of the perithcciuni. Ascus ovate. 

 Sjtoridia 8, 20-2') ft long. 



On Ii'/nis typhi H(i, li. glabra and 7?. ropallina. From Now 

 York to Missouri, and no doubt more widely disti-ihuted: not very 

 connnon. (The perithecia apjjcar to develop earlier and l)etter on the 

 galL« of a l'hyto]ttus all'ecting these host-])lants). 



S. Hiiniiili, (DC.) 



l-'.)\:'iplic Jlumiili, DC. Klore Franc. VI, p. io6. 



SpluFiolhi-ca Ctislafi>it-i, I.ev. in part, Ann. Sci. Nat. XV, p. 139. 



Sl'luctinhcca Hiimiili, IJurrill, Parasitic Fungi of Illinois, II, p. .)oo. 



^Mostly liyj)oj)hyllons. Mycelium incon.spicuous or evanescent. 

 Perithecia scattered, abundant, mostly rather small, 7')-!),") n, ^vall- 

 texturo firm and compact, though thin, siirlace smooth, reticulations 

 small, often obscure, usually loss than 15//; appendages slender, three 

 ov more times as long as the diameter of the perithecium, usuallv col- 

 oi'cd throughout Avhen mature, mostly free from the mycelium. Ascus 

 broadly elliptical or suborbicular. Sporidia usually 8, large, averati"- 

 ing 20 ft long. 



On Viola canina var. sylrestris, Geranium maculatum, G. 

 Kichanhoni, G. iucisinn, Spircea, Physovarpus optdifolia, liubuft 

 odoratuti, R. triflorus, R. drigosus, li. hispidifs, Geinn album, G. 

 Virginian urn, G. macrophyllum, Fragaria, Potent ilia palustris. 

 P. anserina, Poterium, Agrimonia Eupatoria, Gilia gracilis, G. 

 linearis, Humulns hipidus. 



This species i)robably occurs on many other hosts, esjiecially upon 

 other Rosacote, upon which the fungus has usually been identihed as 

 S, Castagnei. 



Common throughout Xorth America east of the Rocky ^fountains. 

 In California Dr. I larkness reports S. Castagnei on hop leaves. This 

 is no doubt what is here called S. HumnU. 



It is exceedingly dilTicult to determine from literature upon what 

 hosts S. ILiinidi occurs, Ijecause it is very rarely sei)arated from 



