﻿122 BOTANICAL GAZETTE [February 



thickened for 5-6 /a, spores 33-35 by i6-20/a; cysts hyaline, 

 ovate to spheroid, about 20^ in diameter, peripheral, 6-10 ; 

 pedicel short, hyaline, deciduous. 



On Mimosa albida: Cuernavaca, Mexico. Sept. 24 and 29, iZc^q, Holway. 

 Through the kindness of Dr. Hennings the writer was enabled to compare 

 the Mexican form with type material from South America, and the two 

 proved to be the same species. 



Ravenelia cassiaecola Atkinson, Box. Gaz. 16:313. 1891; 

 Dietel, Hedwigla 33:50-51, 60-61. 1894; Duggar, Bot. Gaz. 

 17: 144-148- 1892 ; Saccardo, Syll. Fung. 11 : 212. [895 ; Atkin- 

 son, Bull. Cornell Univ. Science 3:20. 1897; Underwood and 

 Earle, Bull. 80, Ala. Agr. Exp. Sta. 217-218. 1897, — Fig, 12, 



Sori breaking forth between the cuticle and the epidermal 

 cells. Uredosorl mainly on the leaves, on both sides, small, 

 I "*°^ or less, cinnamon colored ; uredospores broadly ovate to 

 globose, fulvous or hyaline, minutely echinulate, 14-17 by 16- 

 18/i.; germ pores many, scattered; paraphyses none. Teleu- 

 tosori on the stems, black-brown, large, often confluent for 

 several centimeters ; teleutospore heads fulvous to chestnut- 

 brown, 30-100 M, usual size 60-Zo ^; 4-6 spores in a cross section, 

 usually with a short hyaline point to each spore ; cysts hyaline, 

 firm, globose, 14-18 /a in diameter, pendent, beneath the entire 

 head ; pedicel compound, persistent, fulvous, 60-1 lO )Lt long. 



On Cassia nictitans: Auburn, Ala., 1891, Atkinson, also 1893, Duggar; 

 Starkville, Miss., Sept. 19. 1892, Ellis and Everhatt, N. A. F. 2d series, no. 

 2880. also Sept. 19. 1891, Seymour and Earle, E. C. Fung. Suppl. no. 325. 



Ravenelia MESiLLANA Ell. and Barth., Bull. Torr. Bot. Club 

 25:508. i8g8; Saccardo, Syll. Fung. 16:323. ig02. —Fig. 13. 



Sori breaking forth between the cuticle and the epidermal 

 cells, mainly on the upper surface of the leaves. Uredosori not 

 present in material examined, but uredospores intermixed with 

 teleutospores ; uredospores light brown, broadly oval to globose, 

 spinulose, 20-23 by 1 7-20 /x; germ pores many, scattered; 

 paraphyses none. Teleutosori orbicular, crowded and often 

 confluent, more or less covering the upper surface of the leaves, 

 black-brown ; teleutospore heads chestnut-brown, irregularly 

 orbicular, an occasional head with one or two short papillae on 



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