﻿126 BOTANICAL GAZETTE [February 



clavate-capitate ; heads light brown; pedicel hyaline, 18-20 by 

 40-55/^- Teleutospore heads light brown, spinous, irregularly 

 orbicular, 60-80 by 35)U. thick; spores 4-5 in cross section, each 

 crowned with 2-4 blunt, curved hyaline spines, which range 

 from mere warts to spines 8 ft long by 4/^ thick at base ; cysts 

 when dry, flat, and closely appressed to the under side of the 

 heads, but in water swelling into an oblong shape and finally 

 bursting, peripheral ; pedicel weak, short, deciduous. 



On Calliandra grandiJU)ra Benth. : Mexico, State of Jalisco, mountains 

 near Lake Chapale, Sept. 12, 1889, leg. Prmgle. 



The spines in this species are very variable in size and shape. Very few 

 uredospores were present in the specimen examined, which was a part of the 

 type collection kindly sent me by Dr. DieteL For this reason, the number 

 and position of the germ pores could not be determined with certainty. 



F 



Ravenelia leucaenae, n, sp.— /^^>. 2j. 



Sori breaking forth between the cuticle and the epidermal 

 cells, mainly on the upper side of the leaves, scattered very 

 sparingly on the leaf stems. Uredosori cinnamon-brown, very 

 small, from punctate to 0.4-0.6""", elliptical, surrounded by the 

 ruptured cuticle ; uredospores pale brown, base often semi- 

 hyaline, with a darker but unthickened apex, oblong-linear to 

 oblong-oval and sometimes oblong-ovate, usual shape oblong- 

 linear, sparsely spinulose, 15-18 by 3 5-50 /a; germ pores 4, in 

 the equator or between it and the base of the spore ; paraphyses 

 common, semi-hyaline, fulvous at apex, subclavate to sub- 

 capitate, walls very thin, often collapsed, 18 by 40-50/^. Teleuto- 

 sori chestnut-brown, small, 0.4-0.6"'"' in diameter, surrounded 

 by the ruptured cuticle ; teleutospore heads chestnut-brown, 

 orbicular, 65-90 by 35-40 />t thick, papillate; 5-6 spores in 

 cross-section, each spore crowned with several hyaline papillae 

 4-7 by 2-3 /i. ; cysts oblong-ovate, flattened at base, peripheral, 

 hyaline, swelling and finally bursting in water ; pedicel short, 

 hyaline, deciduous, apparently of separate hyphae.. 



On Leucaena diversifolia: Etla, Oaxaca, Mexico, Oct. 25, 1899, 'no. 

 3826, Holway (type). 



On Leucaena sp.: Iguala. Mexico, Oct* 3, 1900, Holway. 

 This species is related to R, goyazensis, but differs from it in its shorter 

 and hyaline papillae, in the shape of its cysts, and in the very small size of 



