﻿i9 16] LONG— RAVEN ELI A 423 



Ravenelia annulata, sp. nov. 

 O. Pycnia unknown. 



II. Uredinia epiphyllous, very sparingly present, elliptic to 

 irregularly oval, small, less than o. 5 mm. in diameter, subepidermal, 

 tardily naked, ruptured, epidermis very noticeable; paraphyses 

 sparingly present, clavate to subcylindrical, 8-16X36-70 ju, apex 

 thickened 5-7 n, light chestnut brown, stipe subhyaline, walls 

 rather thick; urediniospores ovate to ovate-fusiform, asymmetrical, 

 usually prominently acuminate, 17-23X27-37^, average for 20 

 spores 19. 5X31. 4ju; walls 2 fx thick, cinnamon brown, sparsely 

 but prominently echinulate, with a broad hyaline band or ring 

 around the equator 7-10 n wide, often abruptly narrowed into a 

 short subcylindrical base, which is hyaline for 4-7 /i, occasionally 

 with remnants of pedicel attached, the walls of which are hyaline 

 and minutely verruculose; germ pores 6, small, in hyaline equa- 

 torial belt. 



III. Telia epiphyllous, not seated on pallid spots, small, nar- 

 rowly elliptical to irregularly oval, o. 125-0. 5X0. 5-1 .0 n, sub- 

 epidermal, light chestnut brown, tardily naked, ruptured epidermis 

 very conspicuous; paraphyses numerous, inconspicuous, sur- 

 rounding the telia, same in shape, size, and coloring as those found 

 in the uredinia, apparently no paraphyses situated among the 

 teliospores; teliospore heads light chestnut brown, very irregular 

 in size and shape, irregularly oval, flattened, smooth, 50-73X53- 

 87 ju, average for 10 heads 62.0X72 ju, 4-7 cells across, 8-16 cells 

 around margin of head, 12-34 spores or cells in each head; cysts 

 hyaline, few, about one to each peripheral spore, appressed, extend- 

 ing from pedicel to periphery, united laterally, easily bursting in 

 water; pedicel colorless, short, deciduous. 



On Mimosaceae. Type collected on Lysiloma latisiliqua at Miami, 

 Florida, March 12, 1014, by W. H. Long (no. 4623). 



This Ravenelia is rather common on small bushes (4-10 feet high) of this 



Miami. SPeC a y • g g 



The strongly acuminate urediniospores with their broad, hyaline, equa- 

 torial zones and cylindrical hyaline bases make R. annulata a very unique 

 species. It is closely related to R. lysilomae, but differs from this species in its 

 smaller and differently-shaped sori, in its acuminate urediniospores with 



