Spermogonia and the so-called Spermatia. 19 
far that they originate from promycelial infection of their 
respective host-plants, and that their spores are produced 
in linear basipetal series. In fact, the Cazomata only differ 
from the Aécidia in the want of a peridium. Yet we do 
not find spermogonia exclusively associated with these 
two spore-forms; on the contrary, they occur not very 
rarely with the uredospores—a spore-form which does not 
present any morphologically biological parallel with the 
two above named, inasmuch as its spores are produced 
singly on separate and distinct spore-forming hyphe ; nor 
has any sexuality ever yet been claimed for uredospores. 
As instances in which spermogonia accompany uredospores 
may be quoted Zriphragmium ulmarie and the Brachy- 
puccinie, Puccina hieracit (Schum), P. suaveolens (Pers.), 
P. bullata (Pers.), P. oreoselini (Strauss), and Uromyces 
terebinthi (D.C.). Nor is this all, for spermogonia also 
occur with the teleutospores, as in P. sélphiz (Schw.),* P. 
Salcarie (Pers.), P. liliacearum (Duby), and P. fusca (Relh.).f 
It has been suggested that the association of the spermogonia 
with the teleutospores in the last-named species might be 
only an exceptional case in which the corresponding female 
spore occurred upon some other plant—in other words, that 
it is an hetercecious species; but while admitting the full 
weight of this argument in the abstract, yet of the Puccini 
in question, if P. fusca be a Pucciniopsis, and have for 
its zcidiospores Aicidium leucospermum, an zcidium so 
markedly accompanied by spermogonia that their presence 
was recognized by the older botanists, we must consider 
it to be an exceptionally well-provided species. 
The escaped spermatia are very commonly found scat- 
tered amongst the ezcidiospores, and often adhering to their 
outsides. Mr. W.G. Smith f has represented this condition, 
* Trelase, ‘‘ Parasitic Fungi of Wisconsin.” 1884. 
+ Tulasne, ‘2° Mémoire,” p. 116, note. 
t W. G. Smith, ‘‘ Diseases of Field and Garden Crops,” p. 166, fig. 86. 7 
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