^^ NORTH AMERICAN FLORA [Volume 7 



brown-black spore-mass; spore-balls ovoid to subspherical, firm, chiefly 25-45 fi in length; 

 sterile cells hyaline or yellowish-tinted, ovoid to subspherical, usually completely covering 

 the spores, often thick-walled, 6-12 fi in length ; spores reddish-brown, ovoid to subspheri- 

 cal or polyhedral, smooth, generally 1-6 in a ball, usually 12-16 H- in length. 



On Ranunculaceae : 



Actaea alba, WegtJS^ginia. 



Actaea a rgu ta , ^ta^ 



Actaea sp., Pennsylvania. 



A tra^ene occidentalism Utah, 



Cimicifuga racemosa, North Carolina, Ohio, Pennsylvania, Tennessee. 

 Type locality: Pennsylvania, on Cimicifuga racemosa. ' 



Distribution : Pennsylvania to North Carolina and Utah. 



BxsiCCATi : BUis, Bv. & Earth. Fungi Columb. 1891; Seym. & i^arle, Econ. Fungi C 131; 

 Kellerm. Ohio Fungi 79. . j ^ ^ , ^ e . 



4. Urocystis sorosporioides Korn.; (Fuckel, Jahrb. Nass. Ver. Nat. 29-30: 

 10 ; hyponym. 1875) Fisch. de Waldh. Apergu Syst. Ust. 41. 1877. 



Sori on stems, petioles, and leaves, usually forming pustules of considerable size and 

 causing more or less distortion to host, upon rupture disclosing a dusty browrt-black spore- 

 mass ; spore-balls dark reddish-brown, irregular, oblong to subspherical, firm, chiefly 30- 

 60 /i, rarely 90 /^, in length; sterile cells smoky or yellowish-tinted, usually completely cov- 

 ering spores, ovoid to subspherical, 8-15 /i in length ; spores reddish-brown, oblong to 

 polyhedral or subspherical, usually 4-12, rarely 1-3, smooth, chiefly 13-17 //, the most elon- 

 gate rarely 22 //, in length. 



On Ranunculaceae : 



Acomtum columbianu 



Aquilegia flavescens , 



Aqmlegia leptocera, (^^ 



Delphiniutn scopuloruni, 



Delphinium sp., California. 



Thalicirum alpinum. , ^%e^\Q,n.d.. 



Thalictrum Fendleri ^\si. 



Thalictrum sparsiflorBm , l^Jtah ] 



Thalictrum sp., Arizona, Massachusetts . 

 Type locality : Bonn, Germany, on Thalictrum. m,inus. 

 Distribution : Greenland, Massachusetts, Utah, Arizona, and California ; also in Europe. 



5. Urocystis Violae (Sow.) Fisch. de Waldh. Bull. Soc. Nat. Mosc. 



40' : 258. 1867. 



Granularia Violae Sow. Bngl. Fungi ^/. 440. 1815. 



Sori on stems, exposed rootstocks, petioles and veins of leaves, forming prominent 

 irregular swellings often several cm. in length, rather permanently covered by the tissues 

 but upon rupture disclosing a black-brown spore-mass ; spore-balls reddish-brown, rather 

 irregular, oblong to subspherical, chiefly 28-55 ," in length; sterile cells yellowish-tinted, 

 with age sometimes becoming rather obscure, small, 6-10 // in length ; spores light reddish- 

 brown, ovoid to spherical or polyhedral, chiefly 4-8 in a ball, mostly 11-15 \i in length. 



On Violaceae : 



Viola odorata,^ Canada. 



Viola spp., Minnesota,i 

 Type locality : Dorking, "KHg^&nd, on Viola sp. 

 Distribution : Canada, Minnesota, and Utah ; also in Europe. 



Illustrations: B. & P. Nat. Pfi. l^** : 20, /. 12 A-C; Brefeld, Unters. Gesammt. Myk. 12 : 

 pi. 11,/. 9-15 ; Tubeuf, Diseases Pi./. 174; Ann. Sci. Nat. VI. 10: pi. l,f. 1-18, 25-31. 



6. Urocystis Lithophragmae Garrett, sp. nov. 



Sori in the leaves and petioles, more or less distorting them into dusty black powdery 

 masses, at first covered by a whitish membrane of plant tissues ; spore-balls chiefly sub- 

 spherical, with cortex of sterile cells partially or rather completely covering the fertile cells^ 

 chiefly 20-30 // in length ; sterile cells ovoid to chiefly subspherical or spherical, olive-brown 

 tinted, rather small, 6-10 ^, or the most elongate even 12 /^, in length ; spores usually 1, 

 rarely 2, reddish-brown, subspherical, chiefly 12-16 ^ in length. 



