40 SACCARDO, PECK, TRELEASE 



Puccinia caricis (Schumann) Reber?* 



New Metlakatla (Trelease, 630) ; Sitka (Trelease, 629, on Carex 

 tolmiei? ', Wright, on Carex, 1575). 



III. Sori oblong, bordered but not covered by the epidermis, when 

 dry fissuring transversely at intervals, dark brown, less black than 

 usual with P. caricis; spores brown, 17-20 x about 50 /*, the often 

 somewhat truncated apex much thickened. 



Dr. Juel, who was kind enough to examine the specimens in com- 

 parison with his P. uliginosa (the aecidial stage of which is held to be 

 A. parnassice}, considers it impossible to determine the species of 

 this group without experimental knowledge of their aecidia. See 

 further ^Ecidium parnassice. 



Melampsora farinosa (Persoon) Schroeter?* 



On Salix stolonifera : Disenchantment Bay (Coville & Kearney, 

 10250 not producing discolored spots on the leaves ; sori mostly 

 hypophyllous but also found on the upper surface and occasionally on 

 the twigs; spores 16-23^, paraphyses 15-20/4 in diameter at top, 

 either clavate or capitate). 



On Salix pulchra : Popof Island (Saunders, 611 causing small 

 yellow or brown leaf-spots ; sori most abundant on the lower surface ; 

 spores 16 2O/z; paraphyses about 20 fj. in diameter at top). 



On Salix alaxensis: Muir Glacier (Trelease, 612, 613 causing 

 distinct often large yellow leaf-spots ; sori on both surfaces but most 

 abundant below; spores 16-23^; paraphyses 16-20 or occasionally 

 27 p. in diameter at top). 



On Salix reticulata : Kukak Bay fSaunders, 608 not producing 

 spots ; the distinct sori scattered over the lower surface of the leaf and 

 a few on the upper surface near the base ; spores 16-20 /j. ; paraphyses 

 13-20 //.) . M. reticulatce Blytt differs markedly in its much larger and 

 usually thicker-walled paraphyses. 



On Salix fuscescens : St. Lawrence Island, Bering Sea (Trelease, 

 609 not causing spots; sori hypophyllous; spores 16-23 ^)' 

 Melampsora alpina Juel?* 



Port Clarence (Trelease, 610, on Salix polar is"). 



Producing at most small brown spots ; sori amphigenous ; spores 

 16-20 /j. ; paraphyses 20-27 ^ at a P ex - 



Only the uredo form of these doubtfully determined species of 

 Melampsora was observed. 



Hyalospora polypodii-dryopteridis (Moug. & Nestl.) Magnus.* 

 Juneau (Trelease, 669, on Phegopteris dryopteris)* 



