144 The Botanical Gazette. [May, 
Germination of the teleutospores of Ravenelia cassixcola. 
B. M. DUGGAR. 
(WITH PLATES IX AND X.) 
anatomical studies in 1886, Parker! concludes that the structure 
of teleutospores is really that of a cluster of fused teleutos- 
poric stalks. Cunningham? gives an interesting exposition 
of the development of the successive forms in two East Indian 
species, and also traces the development of teleutospores. 
He shows that the cysts. are essentially modified basal cells of 
the true spore cells, and their origin is illustrated. He makes 
clearer the relation borne to other members of the group of 
Uredinee. However, his attempts at artificial cultivation of 
teleutospores proved failures, * and he is not positive as to the 
success of experiments relative to the artificial infection. 
In the biological laboratory of the Alabama Polytechnic In- 
stitute, and under the direction of Prof. Geo. F. Atkinson, 
artificial cultures have been made with some successful re 
sults. Inasmuch as the designation teleutospore involves the 
idea of the production of promycelia and sporidia, we can 
5° to 90u. The compound colored pedicel is from 10 to Ie 
wide, and the length generally about 80p, yet it may : 
* Morphology of Ravenelia glanduleformis. Proc. Am. Acad. of Arts am 
apt XXII, 
otes on the life history of 2. sessilis B, and R. stictica B. & Br. 
are by Medical Officers of the Army of India. + that #¢ 
ha Coke, Journ. Royal Mic. Soc., vol. im, p. 389, says: ‘‘The utmost ting 
ve been able to accomplish has been to obtain single rer 
he apices of a few of the pseudospores in R. aculeifer® trom 
Alabama." in Botanicat Gazette, Nov., 1891, as ‘A new Ravenelia 
Scientific 
