June 1902] Cultures of Uredineae in ipoo and igoi 



Puccinia angustata Pk. May 3, teleutospores from Scirpus 

 atrovirens were sown on Lycopus americanus; May 11, Sper- 

 mogonia appeared, and May 20, aecidia. 



Puccinia poculiformis (Jacq.) Wettst. May 2, teleutospores 

 from Cinna arundinacea were sown on Berberis vulgaris; May 

 [3, spermogonia appeared, and May 22, aecidia. 



Of the remaining four species, all Carex rusts, the clues 

 which led to successful cultures were obtained in the field, and 

 have been mentioned and explained in an article in the Botanical 

 Gazette for January of the present year. For three of these 

 species it seems necessary to propose new names. All are yet in- 

 sufficiently studied to determine their exact boundaries. 



Puccinia albiperidia sp. nov. 



0. Spermogonia amphigenous, small, pale orange. 



1. Aecidia hypophyllous, small in circular clusters; substratum 

 scarcely thickened ; peridia white, low, margin incised, reflexed ; spores 

 pale yellow when fresh, subglobose, 15-20 fi in diameter ; wall thin, 

 smooth. 



II. Uredosori hypophyllous, small, round or oblong, soon naked; 

 uredospores oblong, small, echinulate. 



III. Teleutosori hypophyllous, globose or oblong, pulvinate, dark 

 brown. Teleutospores oblong-cuneate, 17-24 by 32-45 ll ; apex semi- 

 circular or obtuse, thickened to half the length of the upper cell; side 

 walls thin, slightly or not constricted; pedicel slender, colored, as long 

 as the spore or shorter. 



On Ribes cynosbati L. grown June, 1901 from teleutospores collected 

 on Carex pubescens Muhl, Lafayette, Ind., April 30, 1901. 



This species is characterized by the white or nearly white 

 aecidia, which may be called Aecidium albiperidium. They are 

 in marked contrast with the deep orange aecidia that are so 

 abundant throughout North America on various species of Ribes. 

 The only field collection known to the writer is one on Ribes 

 gracile made at Decorah, Iowa, by E. W. D. Holway on June 

 2, 190 1. When dry and faded the two forms of aecidia are much 

 alike. Cultures were made as follows: 



May 16, teleutospores from Carex pubescens sown on Aster panicu- 

 latus ; no infection. 



May , teleutospores from Carex pubescens sown on Ribes cynosbati ; 

 May 30, spermogonia ; June 9, aecidia. 



Puccinia caricis-erigerontis sp. nov. 



0. Spermogonia epiphyllous, prominent, golden yellow. 



1. Aecidia hypophyllous, in circular clusters; substratum slightly 

 thickened ; peridia short, much divided and recurved ; aecidiospores yellow 

 when fresh, isodiametric, 12-15 lu in diameter, wall thin, minutely 

 tuberculate. 



II. Uredosori hypophyllous, small, oblong, tardily naked ; uredos- 

 pores brownish-yellow when fresh, oval or obovate, small, 12-18 by 

 16-22 [x wall thin, thickly echinulate, pores 3 or 4 scattered. 



