Jackson : New Rusts on Carduaceae 



107 



On Carduaceae [Eupatorieae] : 



Barroetia sp., Coleosanthus (Brickellia) sp., Kuhnia sp. 



Type locality : " Bethlehem, Pennsylvania," on Kuhnia sp., 

 probably error for Indiana. 



Distribution : Indiana to Montana and Arizona, south to Texas 

 and southern Mexico. 



Puccinia redempta sp. nov. 

 O. Pycnia unknown. 



II. Uredinia hypophyllous, scattered or sometimes crowded and 

 more or less confluent, roundish or elliptic, 0.5-1 mm. across, 

 tardily naked, pulverulent, chestnut-brown, ruptured epidermis 

 cinereous, conspicuous; urediniospores globoid or ellipsoid, some- 

 what irregular, 23-27 by 26-32 wall dark cinnamon-brown, 1.5- 

 2 ^ thick, moderately echinulate, the pores 2, approximately equa- 

 torial. 



III. Telia hypophyllous, scattered, roundish, 0.5-0.8 mm. across, 

 tardily naked, pulverulent, chocolate-brown, ruptured epidermis 

 cinereous, conspicuous ; teliospores ellipsoid, somewhat irregular, 

 30-35 by 43-58^, rounded at both ends, slightly constricted at 

 septum ; wall chestnut-brown, 3-4 fx thick, slightly thickened at 

 apex, 5-7 ix, concolorous or slightly lighter in color at apex, smooth ; 

 pedicel colorless, flexuous, short, deciduous or equalling the spore, 

 often attached obliquely. 



On Carduaceae [Eupatorieae] : 



Eupatorium atriplici folium Lam., on bank, Road from town 

 to Highbush, Tortola, West Indies, Feb. 13-17, 191 3. N - L - 

 Britton and J. A. Shafer, phan. spec. no. 795 (type). 

 The specimen on which this species is based is fairly ample and 

 was obtained from a specimen in the phanerogamic herbarium at 

 the New York Botanical Garden by the writer in 191 7. 



It belongs to the smooth-spored group of Eupatorium Puccinias 

 and is apparently most closely related to P. pachyspora Diet, and 

 P. Eupatorii Diet., differing from them both in the slightly thick- 

 ened apex and from P. Eupatorii in the much broader spores. 

 The urediniospores are not compressed laterally as in P. pachy- 

 spora and P. Kuhniae Schw. 



