NOTICES OF NORTH AMERICAN FUNGI. _ 106 



885. Dothidea axnbrosiae. B. ^ C. — Convexa nitida ; ascis line- 

 aribus ; sporidiis uniseriatis ellipticis hyalinis. 



On leaves of Ambrosia elatior. Car. Inf. No. 1387. On A. 

 artemisice folia. Alabama, Beaamont. No. 4GC8. 



Convex, shining ; asci linear; shorter than the slender para- 

 physes; sporidia uniseriate, elliptic, hyaline. 



886. Dothidea vorax. B. ^ C. — Culmum circumdans congesta ; 

 ascis linearibus ; sporidiis filifovmibus. 



On Panicum. Car. Inf. No. 1810. Ravenel. On JJniola. 



Forming a black patch surrounding the stem, \ inch long ; asci 

 linear, sporidia filiform. Sometimes very irregular, and then D. 

 pHulaeformis, B. & C. Car. Inf. On Uniola. No. 1809. D. 

 atrmnentaria, on the under side of grass leaves. Car. Inf. No. 

 1657, is probably a form. 



887. Dothidea eupatorii. B. ^- C. — Erumpens ; elongata irre- 

 gularis, ascis brevibus. 



On stems of Eupatoria c or onopi folia. Car. Sup. No. 798. 

 Forming black, thin, irregular erumpent, granulated patches, an 

 inch or more long ; asci short, obovate. 



888. Dothidea picea. B. & C. — Maculis minutis orbicularibus ; 

 ascis brevibus ; sporidiis angustis cymbteformibus hyalinis. 



On twigs of Vitis cestivalis. 



Forming little orbicular papillose patches ; asci short, clavate ; 

 sporidia hyaline, narrow, cymba^form. 



* Dothidea fructigena. Schmeln. — On apples, which have been 

 lying out all the winter. Car. Sup. No. 336. 



* Dothidea Fteridis. i??-.— Rhode Island. Curtis. Car. Inf. 

 Ravenel. No. 1744. 



* Dothidea alnea. Fr. — On Alnns serndata. Pennsylvania, 

 Michener. No. 3499. 



Spores linear, "0004 long. Not a true Dothidea. 



* Dothidea geogxaphica. Fr. — On leaves of Prumis serotina. 

 Car. Inf. No. 2142. Ravenel. On Nyssa. No. 3218. 



* Dothidea phytolaccae. Sehreein. — Alabama, Peters. No. 546. 



* Dothidea lineola. Schwein.—On Hemerocallis.. New England. 

 Russell. 



* Dothidea heliopsidis. sSchrveln.— On Helianthus. Missouri, 

 Dr. Engelmann. No. 3G80. 



* Dothidea Rhois. ScJnvein.— On leaves of Rhus copallina. Car. 

 Inf. No. 3173. 



889. Dothidea scutula. B. Sf C"— Orbiculata applanata, cellulis 

 plurimis globosis ; ascis brevibus. . 



On the upper surface of leaves of Laurus Carohniensis. Car. 

 Inf. Ravenel. No. 478. 



