BOTANICAL GAZETTE. 8j 



nm Saponaria?, Rudolph, and Sorosporium Junci, Rudolph, which 

 are regarded as representing different genera, and accordingly the 

 latter is named Tolysporium Junci. Plate IV. figures 1, 2, 3. 4 

 show the spore masses of this last and the mode of germination ; 

 figures 5, 6, 7, 8 reveal the mode of production of the sporidia, which 

 orcur in whorls on the thickish, jointed promycelium and copulate 

 by their upper ends. 



Thecapkord hyalina, Fingerh., though it has been named Soro- 

 )rium hyalinum, is distinguished from this genus by both spore 

 s' rue care and mode of growth. As the period of vitality of these 

 spores is but brief, all culture experiments with them must be made 

 with fresh specimens. Plate III, fig 19, shows the brownish-yellow 

 spore balls made up of from 2 to 20 verrucose spores. A very char- 

 acteristic mark of these is the clear, round spot through which the 

 germinating endospore tube protrudes. It is very suggestive of i 

 Uredospores. This is shown by figures 20-22. Figures 24-26 show, 

 instead of normal sporidia such as are found in Tolysporium and 

 most of the Ustilaginece, a number of lateral non-septate branches 

 produced upon the septate promycelium and those (the former) of 

 the same promycelium copulate by their extremities, to accomplish 

 which the lower bend upward and the upper downward, after which 

 a long cell develops, becomes septate, and then accumulates all the 

 protoplasm in its terminal segment. 



Sorosporium Astragali and S. Desmodii, both of Peck, are 

 regarded on spore evidence as belonging to the genus Thecaphora. 



Figures 9 and 10 of Plate IV are devoted to formation of spori- 

 dia by Entyloma Eryngii; 12-18 to E.Aschersonii; and 19-26 toE. 

 Magmisii. Of these the last two species are removed from their 

 former place in Sorosporium and on spore data placed in Entyloma. 

 Whilst copulation of sporidia in Entyloma is common, it does nor 

 occur in E. Aschersonii. Figures 27-35 of the same plate sh 

 Melanotcenium endogenum, de Bary, which grows on Galium Mollu- 

 go and G.' rerum. It was formerly known as Protomyces endogem 

 linger, and P. Galii, Rabh. Here we find strong mycelium and 

 haustoria, the latter of which sometimes take up one-third of the 

 cell intowhich they enter. The spores are dark-brown', oval, and 

 germinate by protrusion of the endospore and production of a pro- 

 mycelium, and show in their mode of growth a relationship to Enty- 

 loma, as de Bary had suggested. From the summit of this strong 

 promycelium several oblong sporidia develop and these copulate by 

 their apices, of course while still attached to the promycelium. 



The following is an abstract of the Ustilaginece as arranged in 

 this paper : 



I. No 'sporidia" produced directly from the slowing spore. 



a. Spores produce many -celled tubes or threads, which remain eitbei 

 simple and unbranehed, or whose terminal plasma-containing 

 cell has several lateral, irregular, divided branches. Tbe; un- 

 branchcd terminal joint can tor a time live and grow if separate! 

 from tlie empty cells below. 

 1. Sorosporium, Rudolph!. % 



S. Sdponarim, Ruftelplii. 



