Arthur: Uredinales Collected in Trinidad 



13 



the synonymy can be found, so far as that work has been published. 

 All collections, except the one noted, are to be credited to Dr. 

 Seaver, and the date of collection is March-April, 1921. Num- 

 bers 26, 33, 39, 41, 46, 47, 50, 52-57, thirteen in all, or eighteen 

 per cent, are short-cycle species, the remaining fifty-eight are vari- 

 ous forms of long-cycle species. 



1. Coleosporium Ipomoeae (Schw.) Burr. N. A. F. 87 



On Ipomoea glabra (Aubl.) Choisy, II, 3x81, 3275, 3291; 

 Ipomoea sp., II, 3274, 3385. A common rust in its uredinial stage 

 throughout tropical America. 



2. Phakopsora Crotonis (Cooke) Arth. N. A. F. 104 



On C rot on gossypifolium L., II, 3253, 3424; C. hirtus L'Her., 

 II, 3109. This rust was described by P. Hennings (Hedwigia 35 : 

 251. 1896) under the name U re-do crotonicola, on Croton grandu- 

 losus from Argentina. 



3. Phakopsora Meibomiae Arth. Bull. Torrey Club 44: 509. 



1917 



On Meibomia supina (Sw.) Britton, II, 319 J ; M. triflora (L.) 

 Kuntze, II, 2960. 



4. Cerotelium Gossypii (Lagerh.) Arth. N. A. F. 187 

 On Gossypium sp., II, 2953, 3388. 



5. Ravenelia Indigoferae Tranz. N. A. F. 144 

 On Indigofera suffruticosa Mill. (/. Anil L.), 3077. 



6. Prospodium appendiculatum (Wint.) Arth. N. A. F. 160 

 On Tccoma Stans (L.) Juss., Ill, 3406, 3430. 



7. Prospodium suppressum sp. nov. 



O. Pycnia amphigenous, numerous, blackish-brown, inconspicu- 

 ous, subcuticular, conic, small, about 100/x broad and about same 

 height; ostiolar filaments wanting. 



