Report of the Botanist. 93 



^croiuM Iridis Gerard in lit.^ n. sj). 



Spots ov^al or suborbicular, yellow ; peridia ampliigenoiis, short, 

 seriately placed ; spores bright orange, 12^00 ~io^oo^ i^^ diameter ; 

 spermogonia abundant, central, amphigenons. 



Leaves of IrU versicolor. Poughkeepsie. Gerard. Buffalo. 

 Clinton. 



The peridia are equally abundant on both sides of the leaf, and 

 are mostly arranged in lines between the veinlets of tlie leaf, 

 characters by which this species may be easily known. 



^EciDiuM Allenii Clinton m lit.^ n. sj). 



Spots large, indefinite, yellowish ; peridia hypogenous, elongated, 

 cylindrical, white, nestling among the tomentum of the leaf; 

 spores bright orange, subglobose, y^Vo' ^^^ diameter. 



Leaves of SliepJierdia Canadensis. Buffalo. Clinton. June. 



A fine species, dedicated to Dr. T. F. Allen. The spots are 

 visible on the upper surface of the leaf, but are concealed by the 

 tomentum on the lower surface. 



ROESTELIA CORNUTA Tul. 



Leaves of Cratmgus^ Amelanchier Canadensis and Pyrus 

 Americana. Pouglikeepsie. Gerard. Greenbush. 



Stilbum Rhois B. (& C. ^ 



Branches of Bhns glabra. Garrisons and Greenbush. June, 

 October. 



Stilbum pellucidum ScJirad. 



Potten wood of deciduous trees. Indian Lake. October. 



Stilbum giganteum n. sj). 



Stem firm, stout, black, equal or slightly tapering upward, single 

 or csespitose, surmounted by a soft, viscid, whitish, subglobose 

 head ; spores minute, elliptical, about yy-n-Q-o' long. 



Old logs in w^oods. Buffalo. Clinton. Catskill mountains and 

 Greig. September and October. (Plate 3, figs. 7-9.) The stems 

 are 3''-5" high. 



Fusarium erubescens B. db C. 



Dead branches. Center. October. 



Tubercularia nigricans DC 



Dead branches of apple tree, elder, etc. Center. October. 



Oidium fructigenum Kze. 



On old plums. Sandlake. October. 



