Jan. 1907] The Rusts of Guntemala 25 



exceedingly large, with coarsely marked thick walls, much thick- 

 ened above. The characters of the pycnia and eacia are so un- 

 like those of autoecious species on Malpighiaceae that it is as- 

 sumed to be heteroecious. The fact that the pychia are sugcuti- 

 •cular indicates that it does not belong to the Uromyces-Puccinia 

 group but to some genus of the Raveneliatae or Uropyxidatae 

 Both host and fungus of a specimen in the New York Botanical 

 Garden, collected at Rancho Guerro, Jalisco, Mexico, June 15 

 1892, by M. E. Jones, said to be on an Ericaceous host, agree 

 perfectly with this Guatemalan specimen. Because of the long 

 bladdery peridia there is a resemblance to Peridermium, and the 

 Mexican specimen has been so labelled, but there can now be no 

 doubt that it belongs here. 



37. UREDO BIOCELLATA Arth.— On Pluchea odorata 

 Cass, (host no. 5202, det. by J. M. Greenman), Amatitlan, Depart. 

 Abiatitlan, Jan. 25, 1906, no. 5388. 



The sides of the spores in this species are inflated in a very 

 conspicuous manner making them unusually odd. It has been 

 known before only from the type locality, Florida Keys, on Plu- 

 chea purpurascciis. 



38. UREDO FICINA Juel.— On Ficus aurea Nutt ; Gua- 

 lan, Depart. Zacapa, Jan i, 1906, no. 5456. 



This species differs from the common Ficus rust, Uredo Fici 

 Cast., in its larger spores and especially in the paraphyses, which 

 are curv^ed, strong and thick-walled as compared with the more 

 erect, slender, thin-walled ones of U. Fici. The host of the Gua- 

 temalan specimen agrees so well with a specimen from Florida 

 known to be Ficus aurea, that it has been called by that name 

 The fungus on the Florida specimen is also U. Hcina. The species 

 is chiefly known from South America, where the type was col- 

 lected. 



39. UREDO CABRERIANA Kern 8c Kellerm. sp. nov. 



II. Uredinia chiefly hypophyllous, gregarious in orbicular 

 groups 2-4 mm. across, or scattered singly, roundish, 0.5-1 mm. 

 across, subepidermal, soon naked, chestnut-brown, pulverulent, 

 ruptured epidermis conspicuous ; paraphyses intermixed with the 

 spores, spatulate or sometimes capitate, often irregular, 10-23 x 

 40-80/X, heads solid, stipes hollow ; urediniospores broadly obovate- 

 ellipsoid, 17-27x27-34/7., wall dark chestnut-brown, thick (3-4/x,), 

 thicker above {S~7 P-) coarsely echinulate with blunt conical tu- 

 bercles 3-4 ju, apart, pores 3, rarely 4, equatorial. 



On Buettneria lateralis Presl. (?) (host no. 5219), Livings- 

 ton, Depart. Izabal, Jan. 18, 1905, no. 5465. 



