FUNGI 



37 



Chiefly differs from the aecidial form of Puccinia gentiance in the 

 grouping of the spermogonia and the form of the peridia. 



^cidium alaskanum Trelease, sp. nov. * 



Spots pale, mostly elliptical, about 5 X 5-10 mm. Spermogonia 

 wanting; aecidia amphigenous, but most abundant on the lower 

 surface, about .25 mm. in diameter, with multifid recurving border, 

 peridial cells about 28 ^ broad ; spores little longer than broad, nearly 

 smooth, 16-20 p. 



Kadiak (Trelease, 652, on Habenaria bracteata, 65 20, on If. hy- 

 perborea, 653, 654, 655, 656, 657, on H. dilatata; Trelease, 650, on 

 Orchis aristatd) ; Popof Island (Kincaid ; Saunders, 658, 659 all on 

 Habenaria dilatata) ; Unalaska (Trelease, 651, on Orchis aristata*) ; 

 near Ocean Cape, Yakutat Bay (Funston, on Habenaria dilatata, 

 52) ; Bering Island (Macoun, on Habenaria bracteata, 144). 



Of the general appearance of A. orchidearum, now held to be the 

 secidial stage of Puccinia molinice, but differing in the absence of 

 spermogonia and in its larger peridial cells and smaller, less sculptured 

 spores. 



^cidium epilobii De Candolle.* 



Glacier Bay (Coville & Kearney, 952) ; Kadiak (Trelease, 6590). 

 On leaves of Epilobium. 



.flScidium violascens Trelease, sp. nov.* 



Spots large, irregular, effuse, violet especially on the upper surface 

 of the leaf, frequently following the veins which are then thickened. 

 Sori hypophyllous, scarcely .5 mm. in diameter, hemispherical, crowded 

 irregularly or along the veins ; peridia included, borderless, the irreg- 

 ularly oblong cells about 20 X 30-40 /*, sinuously and rugosely rough- 

 ened ; spores variously and often polygonally rounded to ellipsoidal, 

 minutely verruculose, 22-28 x 2235 /*. 



Kadiak (Trelease, 634) ; Kukak Bay (Saunders, 636, on a leaf with 

 Puccinia geranii-silvatici). On leaves of Geranium erianthum. 



From A. geranii this differs in the color of the spots, the frequent 

 thickening of the veins, fewer peridia neither regularly arranged nor 

 with spreading border, and much larger spores. 



.fficidium asterum Schweinitz.* 



Kadiak (Trelease, 624, on Aster folzaceus). 



^Ecidium parnassiae (Schlechtendal) Grav.* 



Kadiak (Trelease, 665, on Parnassia palustris) . 

 See, further, Puccinia caricis. 



