126 



JOURNAL OF MYCOLOGY. 



Vol. 1, 



parum angustatae, pallide fuscidulae, usque 50 longae, 3.5 z-'- crassae. 



Ad folia viva Polygoni avicularis L., Juli, 1833. Sporis brevioribus, 

 fuscidulis, liypliisque brevioribus, etc., a Cercospora polygonacea E. et 

 E. bene distiricta ; cum Cercospora Polygonoruui Cke. non comparauda. 



CiiEPiDOTUS nuFO-LATfiarnus Bresadola in litt. ad me.— Pileus 

 membraiiaceus, resupiuatus, raro refiexus, cupularis, 2 — 4 millim. latus, 

 glaber, lateritio-rufidulus, margine lobato. Lamellae latae, ventricosae, 

 valde distantes, in punct.) excentrico concurrentes, utrinque rotundatae, 

 concolores acie alba. Sporae ovatae, flavidae, 10—12 .'j- longae, 8 /-^ crassae. 



Ad corticem Crataegi crus-galU L. , Februar, 1884. 



^ciDiUM Cjekastii Winter nova speces. — Pseudoperidia supra 

 faciem foliorum inferiorem totam dense sparsa, interdum praecipue 

 secus nervum primarium stipata, sine macula, sed folium totum decolor- 

 antia, semiimmersa, patellaeformia, late aperia, margine crenulato 

 incisoque, late recurvo, albida. Sporae angulato-rotundatae, tenuissime 

 verruculosae, aurantiaceae, 17—22 fJ- diam. 



Ad folia viva Cerastii nutantis. Reft". Mai. 1885. 



NOKTH AMERICAN SPECIES OF CYLINDRO- 



SPORIUM. 



BY J. B. ELLIS AKD B. M. EVEKHAET. 



Cylindrosporium, linger, Em.* Cylindrospora. TJng. Exanth, p. 

 166. — Of this g?nus, as novv u ^derstood, Saccardo, in Syll. Ill, describes 

 eighteen species and defines the genus as follows : 



"Acervula (collections of hyphse and conidia) subepermidal, white or 

 pallid, disciform or subeftiuse. Conidia iiliform, hyaline, continuous, 

 generally flexuous." This character, so far as the conidia are concerned, 

 should be emended for the conidia, at first generally nucleate, become in 

 some cases certainly, possibly in all, one or more septate. The subepi- 

 dermal origin of the conidia is the essential character separating this 

 genus from Cercospora. In Gloeosporium the spores are shorter and 

 thicker and are mixed with a viscous fluid which, expelled with them, 

 dries into little resin-like heaps on the surface of the matrix. The fol- 

 lowing species of Cylindrosporium have thus far been found in this coun- 

 try : 



1. Cy^ltndrosporium veratrinum, Sacc, & Winter, Rab-Winter's 

 Fungi Eur. 2879, Sacc. Syll. Ill, p. 740. 



Acervuli minute, innate, seriate, irregular. Hyphse filiform. Conidia 

 bacillary, curved, rounded at the ends, 75—90 x 3i— 4i 2— 3-septate, not 

 constricted, hyaline, expelled in white tufts or heaps which form narrow, 



* The CuUnclrosporium of Preuss in Linn. 1851, is, as we judge from the figure of C. 

 longipes, in Sturm's Flora III, 29, p. 69 tab. 35, synonymous in part, at least, with 

 Chalara. 



