﻿1903] RAVENELIAS OF THE UNITED STATES 1 1? 



small. Uredosori not present in material examined; uredosporcs 

 oval to spheroid, light brown, spinulose, 13-20 by 16-20 jti, germ 

 pores many, scattered ; paraphyses hyaline to fulvous, clavate 

 to capitate, 50-70 /x long, 10-20 /x thick ; heads fulvous. Teleuto- 

 spore heads dark brown, smooth, irregularly orbicular, 60-70 

 by 20-35 ^ thick ; 5-6 spores in cross-section, each 16-20 by 30 /i, 

 tops dark brown ; cysts oblong to ovate, hyaline, pendent, periph- 

 eral, swelling and bursting in water; pedicel hyaline, short. 



On Desmanthus or Cassia: College Station, Texas, 1889. Leg. Brunk 

 and Jennings. 



Ravenelia Longiana Syd., Hedwigia 40: 128. 1901. — Fig. 2. 



Sori breaking forth between the cuticle and the epidermal 

 cells; on both sides of the leaves. Uredosori cinnamon-brown, 

 orbicular, 0.5-1"*"^ in diameter, often confluent over wide areas, 

 mainly on the under side of the leaves; uredospores obovate, 

 oval or spheroid, spinulose, light brown, 20-33 by 23-26 /^ ; germ 

 pores many, scattered; paraphyses present in the uredosori; 

 few, semi-hyaline, hypha-like, walls much thickened. Teleuto- 

 sori large, black, orbicular, 1-2™°^ in diameter, on both sides of 

 the leaves; teleutospore heads chestnut-brown, smooth, irregu- 

 larly orbicular, 75-90 by 25-33 /t thick; 6-8 spores in cross 

 section; cysts hyaline, spheroid to pyriform, beneath entire head, 

 crowded, diameter about 16 /t ; pedicel hyaline, compound, short. 



On Cassia Roemeriana \ Austin, Texas. Nov. 15, 1897 (typ^ material for 

 HI spores); Aug. 24, igoi.no. 1019 (type for II sori). The type material for 

 this species had no uredosori on the leaves, but a few uredospores were inter- 

 mixed with the teleutospores. In August 1901, the writer collected the 

 uredosori for the first time ; the under side of the leaves of the host was nearly 

 covered with the sori, while the upper surface was comparatively free. 



Ravenelia indica Berkeley, Gard. Chron. 10:132. 1853. 

 Cooke, Jour. Roy. Micr. Soc. 3:385. 1889; Saccardo, Syll. 

 Fung. 7:772-773. 1888; Dietel, Hedwigia, 33:51-52, 60. 

 1894; Holway, Box. Gaz. 31 : 336. 1901. — Fig. 4. 



Sori breaking forth between the cuticle and the epidermal 

 cells. Uredosori on both sides of the leaves, often irregularly 

 grouped around a central sorus, cinnamon-brown ; uredospores 

 ovate to globose, spinulose, pale yellow, 13-17 by 17-20/i; 

 germ pores many, scattered ; paraphyses none. Teleutosori 



■ F^. r L^ ' -mar l 



