North American Species of Puccinia on Carex 215 



lower one, narrowed below into the pedicel ; wall light chestnut- 

 brown, paler below, about 1.5/x, thick, much thicker above, 7-12 fx; 

 pedicel firm, tinted, often darker than the lower portion of the 

 spore, one half length of the spore or less. 



On Carex acutina, amplifotia, aquatUis, atherodes, Baileyi, 

 comosa, crinita, diandra, exilis, exsiccata, laciniata, lacustris, lanu- 

 ginosa, magnifica; nebraskensis, nigricans, nudata, Pseudocyperus, 

 retrorsa, rostrata, Sartwellii, siccata, stipata, stricta, trichocarpa, 

 viridula. 



Distribution : Across northern United States from Connecti- 

 cut, New York and Delaware to Washington, Oregon, and Utah, 

 and in Ontario ; also in Europe, Siberia, and Japan. 



Exsiccati: Barth, Fungi Columb. 2551, 2655, 3170, 3179, 

 3349, 3545, 354$, 357h 3^55, 3^37, 3^3^, 3^3, 3^4, 4066, 4166, 

 435^, 4377, 4575, 4^, 4979, 5057—3772, 3973, 497%', Barth. N. 

 Am. Ured. 740, 770, 940, 108 '/, 1082, 1242 — 972 ; Brenckle, Fungi 

 Dakot. 12, 294 — 118; Clements, Crypt. Form. Colorad. 550, 551 

 — 601; Ellis & Ev. Fungi Columb. 1468, 1759', Garrett, Fungi 

 Utah, 44, 45, 129, 167, 172; Griff, W. Am. Fungi 339 ; Kellerm. 

 Ohio Fungi, 70, 71, 192 — 69; Sydow, Ured. 464, 1065, 1575 — 

 25I3- 



A widely distributed and rather common Carex rust. The 

 characteristic features are the moderately large urediniospores 

 with the three, or rarely four, equatorial pores and the long 

 clavate teliospores with the rounded upper cell which is broader 

 and much shorter than the lower cell. On the most of the hosts 

 listed the spores are characteristic and placed here with consid- 

 erable confidence. The form of C. nebraskensis, formerly deter- 

 mined as C. Hoodii, was at one time named Puccinia Garrettii 

 and described as having amphispores. The tendency of these 

 spores toward thicker walls and retention of pedicels is perhaps 

 better interpreted as a condition of slight immaturity than as a 

 modification toward a resting condition, which we now believe to 

 go with genuine amphispores. Both culture evidence and field 

 observations favor the present disposition. 

 * 



7. Puccinia lysimachiata (Link) comb. nov. 

 Aecidium Lysimachiae Schw. Schrift. Nat. Ges. Leipzig 1: 67. 

 1822. Not P. Lyssimachiae Karst. 1879. 



