198 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



30. Allodus superflua (Holw.) comb. nov. 

 Piiccinia superflua Hohv. Ann. Myc. 2: 392. 1904. 



Aecia hypophyllous, the secondar}^ form occurring singly or in 

 groups; aeciospores 16-19 by 21-26 /i; wall 2-2.5 M thick, coarsely 

 verrucose. 



Telia chiefly epiphyllous, scattered, singly or in small groups 

 over entire leaf, pulvinate, dark chocolate-brown, ruptured epi- 

 dermis conspicuous; teliospores 25-32 by 46-64 yu, broadly ellip- 

 soid; wall 3.5-4 At thick, dark chestnut to chocolate-brown, rather 

 coarsely and sparsely tuberculate, the apex 8-12 /^ thick, nearly 

 concolorous; pedicel light brown next to spore, up to 90 )u long, 

 uniform. 



On Convolvulaceae: 



Ipomoea arhorescens (H. & B.) G. Don. 

 Type locality: Iguala, State of Guerrero, Mexico on Ipomoea 



murucoides, error for /. arhorescens. 

 Distribution: Known only from the type locality. 



31. Allodus megalospora sp, nov. 



Aecia chiefly hypophyllous, gregarious or occurring singly, 

 distributed over the entire leaf, opposite the telia; aeciospores 

 19-28 by 24-34 )u; wall 1-2 ix thick, finely verrucose. 



Telia chiefly epiphyllous, occurring singly or in groups, often 

 confluent to form large pulverulent sori, often on the veins opposite 

 the aecia, early naked, dark chocolate-brown, ruptured epidermis 

 soon becoming inconspicuous; teliospores ellipsoid, 24-33 by 

 48-71 ji; wall 4-5 jx thick, chocolate-brown, coarsely tuberculate, 

 the apex 7-12 /x thick, nearly concolorous; pedicel tinted next to 

 spore, stout, up to 115 ^i long. 



On Convolvulaceae: 



Ipomoea arhorescens (H. & B.) Don, I. Carolina L. (not I. 

 Carolina Pursh), /, intrapilosa Rose, and /. murucoides R. & S. 

 Type locality: Oaxaca, Mexico, on Ipomoea murucoides. 

 Distribution: Mexico and the West Indies. 

 ExsicCATi: Sydow, Ured. 2036; Barth. N. Am. Tred. 42Q. 



32. Allodus Douglasii (Ellis & Ev.) comb. nov. 

 Puccinia Douiilasii Ell. & Ev. Proc. Acad. Phil. 1893: 152. 1893. 

 Dicaeoma Douglasii Kuntze, Rev. Gen. 3': 468. 1898. 

 Puccinia Richardsoni Sydow, Monog. 11^ red. 1: 317. 1902. 



Aecia hypophyllous, covering the leaves, apparently from a 

 perennial mycelium; aeciospores 13-19 by 17-21 ju; wall i-i.5)u 

 thick, finely verrucose. 



