4-O SACCARDO, PECK, TRELEASR 



Puccinia caricis (Schumann) Reber? * 



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

 tolmieif; 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 ascidial stage of which is held to be 

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

 this group without experimental knowledge of their aecidia. See 

 further ^3cidium 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 /x, 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/x; paraphyses about 20 /* 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 i6-23//; paraphyses 1620 or occasionally 

 27 fJi in diameter at top) . 



On Salix reticulata: Kukak Bay ( Saunders, 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^; paraphyses 

 1320 /x) . M. reticulates 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 /i). 

 Melampsora alpina Juel?* 



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



Producing at most small brown spots ; sori amphigenous ; spores 

 16-20 /*; paraphyses 2027^ at apex. 



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). 



