Arthur: Uredinales of Porto Rico 81 



be found for maintaining an independent species. Such a pre- 

 ponderance of mesospores is not uncommon with this rust on 

 other hosts. We have here an instance in which all uredinol- 

 cgists agree that there is no taxonomic distinction between the 

 genera Uromyces and Puccinia worth maintaining. Another col- 

 lection on Pavonia racemosa was found in the cryptogamic her- 

 barium of the N. Y. Bot. Garden, made near Port Angelo, 

 Jamaica, May 12, 1903, L. M. Underwood 2992. 



63. Puccinia Psidii Wint. 

 On Myrtaceae: 



Jamb os Jambos (L.) Lyons {Eugenia Jambos L., Jambosa 

 Jambos Millsp.) Maricao, March 15, II, 334, March 16, 

 II, 335, March 23, II, 336. 



64. Puccinia Hydrocotyles (Link) Cooke, Grevillea 9: 14. 



1880. 



On Ammiaceae (Umbelliferae) : 



Hydrocotyle umbellata L., Mayagiiez, south along rail- 

 road, March 20, II, 233, Experiment Station grounds, 

 March 29, II, 232; Yauco, March 30, II, 234. 

 This is the first record of the rust for the West Indies, although 

 common on the continents both to the north and south. 



65. Puccinia concrescens Ellis & Ev. 

 On Asclepiadaceae : 



Asclepias curassavica L., Maricao, March 16, electric light 



plant, 29$, March 25, cemetery, 296. 

 Asclepias nivea L., Maricao, Rio Grande valley, March 24, 



298. 



The last host is a new one for the rust. 



66. Puccinia oblioua Berk. & Curt. 

 On Asclepiadaceae: 



Metastelma lineare Bello, Maricao, March 22, 259. 

 Metastelma parviflorum R. Br., Mayagiiez, March 7, 258. 



6y. Puccinia Lithospermi Ellis & Kellerm. Jour. Myc. 1 : 2. 

 1885. 



On Convolvulaceae : 



Evolvulas nummular'uis L., Mayagiiez, March 7, II, 379; 

 Anasco, March 28, II, 311. 



