Arthur: Uredinales of Porto Rico 



89 



96. Uredo globulosa Arth. 

 On Amaryllidaceae : 



Hypoxis decumbens L., Maricao, March 23, 313; Anasco, 

 March 28, 448. 



The first collection of this species in Porto Rico was made at 

 Rio Piedras, March 14, 191 1, by J. R. Johnston. 



97. Uredo Coccolobae P. Henn. Hedw. 35: 253. 1896. 

 On Polygonaceae : 



Coccoloba iwifera L., Mayagiiez, March 3, 342; Boqueron, 

 March 11, 343; San German, April 1, 344. 



The large, leathery leaves of the host are abundantly be- 

 sprinkled with the punctiform sori, to some extent on both sides, 

 but especially beneath. The fungus produces scarcely any dis- 

 coloration, except to give a rusty appearance to the surface, due 

 to the reddish-brown tissue closely surrounding the sori. 



The spores are ellipsoid, 21-24 by 2 9~37f t > wa ^ 1-1 -5 thick, 

 pale yellow or nearly colorless, finely and closely echinulate, pores 

 obscure. The sorus is subepidermal, surrounded by colorless, 

 clavate paraphyses, which are imbricated into a pseudoperidium. 

 The sorus opens by a central pore. 



This is the first collection of the species from North America. 

 The type was on C. populifolia Wedd., from Brazil. 



98. Uredo notata sp. nov. 

 On Malpighiaceae : 



Byrsonima crassifolia H. B. K., Mayagiiez, March 7, jjj. 

 Uredinia hypophyllous, scattered or somewhat in groups, bul- 

 late, 0.1-0.4 mm - across, fuscous, subepidermal, opening by a 

 central pore ; pseudoperidium of imbricated paraphyses, the free 

 portion of each one cylindrical, bluntly rounded at the end, or 

 sometimes acuminate and pointed, 9-1 5 ^ in diameter, the free 

 part 75-115 /x long, the wall colorless, thickened to leave the lumen 

 scarcely visible; urediniospores ellipsoid or broadly obovoid, 

 borne singly, 23-30 by 35-50 //, ; wall golden-brown, moderately 

 thick, 2-4 fx, sometimes thicker above, 3-7 p., strongly and sparsely 

 echinulate. 



The spores much resemble those of Uredo nberabensis P. 

 Henn., from Brazil, on some undetermined species of Byrsonima, 

 but are considerably larger. The conspicuous pseudoperidium 



