Arthur: Uredinales of Porto Rico 59 



Jacquemontia tamnifolia (L.) Griseb., Anasco, March 28, 

 II, 242. 



3. Coleosporium Plumierae Pat. 



On Apocynaceae: 



Plumiera alba L., Guanica, March 30, II, 2pp. 



Family: Uredinaceae (Melampsoraceae) 



4. Physopella Vitis (Thiim.) Arth. 



On Vitaceae : 



Vitis vinifera L., Maricao, March 22, II, 347. 



5. Physopella Meibomiae sp. nov. 



On Fabaceae: 



Meibomia supina (Sw.) Britton (Desmodium supinum 

 DC.), Anasco, hillside, March 28, II, III, 2ip (type) ; 

 Tanama River Valley, April 7, II, ^75. 



Uredinia hypophyllous, scattered or somewhat aggregated on 

 discolored areas, small, about 0.1 mm. across, at first punctiform, 

 pale, subepidermal, opening by a pore about which the spores 

 accumulate ; paraphyses imbricated to form a pseudoperidium, 

 small, incurved, clavate, 7-10 by 26-64 /x, the wall colorless, thin, 

 slightly thicker above ; urediniospores globoid or broadly obovoid, 

 13-19 by 19-23 /x; wall colorless, thin, 1-1.5/x, very closely and 

 finely echinulate, the pores obscure. 



Telia hypophyllous, associated with the uredinia, inconspicuous, 

 giving no surface indication, subepidermal, lenticular, small, about 

 0.1 mm. across and one half as high; teliospores smooth, com- 

 posed of 2-3 cells in series, the outer cells larger, irregularly 

 oblong, 9-12 by 13-19/*, the wall thin, 1 ^ or less, somewhat 

 thicker above, 2-2.5 /*> P a ^ e cinnamon-brown, becoming dark cin- 

 namon-brown above, the inner cells globoid or ellipsoid, paler, 

 not thickened above. 



This inconspicuous species differs in its uredinia very little from 

 a collection of unnamed uredinia on Desmodium heterocarpum 

 from Ceylon, sent the writer by Mr. T. Petch, government mycol- 

 ogist, and may be the same No other similar collection has been 

 seen. 



The species is here placed under Physopella, because it accords 

 in the characters of its uredinia and telia with the type species 

 of that genus, while it does not thus accord with Phakopsora or 



