36 British Uvredinee and Ustilaginee. 
CHAPTER VI. 
TELEUTOSPORES. 
AT some period in the life of all Uredines* a spore is 
produced from one of the before-mentioned mycelial de- 
velopments, to which the appellation teleutospore has been 
given. In the strict sense of the term teleutospore means 
the last-formed spore—that is to say, it is formed later in 
point of time than the ecidiospores and uredospores ; but 
while this is true in the majority of cases, yet there are many 
species of the Uredinez in which no other spore-form than 
the teleutospore occurs. Still, the name has become so 
familiarized to us by long usage that it is unadvisable to 
change it. These spores are formed in a similar manner 
to the uredospores from a stroma (spore-bed, clinode, 
hymenium) produced by an aggregation and entanglement 
of mycelial hyphz placed just beneath the cuticular 
structures of the host-plant and parallel to them. Per- 
pendicularly from this stroma are given off erect branches, 
_ which, becoming dilated at their free ends, are soon in- 
* De Bary (‘‘ Vergl.,” p. 305) points out that Uredo symphyt? has no other 
spore-form than the Uredo, and indicates this species as being a degenerate 
type, which, having lost its other spore-forms, is capable of existing without 
them, Without questioning the truth of this statement, one cannot fail to re- 
member that until quite recently the other spore-forms of many Uredines were 
unrecognized, for instance, Melampsora cerastid ; so it is quite possible that the 
teleutospores of U. symphyti may exist, although we at present do not know 
of them, 
