TELEUTOSPORES 35 
The teleutospores are generally produced in sori like those 
of the uredospores; they frequently arise on the same mycelium, 
and very often on the same spore-bed, mingled with the uredo- 
spores. If both are found in any species, the teleutospores are 
always formed at least not earlier, and usually later than the 
uredospores. Their primary function now is to tide over an 
unfavourable period; for this reason they are sometimes called, 
in England, winter-spores. They may be one-celled as in 
Fig. 23. Figures of various Teleutospores of Pucciniaces (after Sydow). From 
left to right, they are (in the top row) Puccinia roesteliiformis, P. conspersa, 
P. globosipes, P. Megatherium, Uromyces globosus, Hapalophragmium 
Derridis; (in the second row) P. appendiculata, P. Euphorbiae var, intu- 
mescens, P. deformata, U. achrous, U. giganteus, U. Ipomoeae, Triphragmium 
Cedrelae. All x 480. (Non-British.) 
Uromyces, two-celled as in Puccinia, radiately three-celled as 
in Triphragmium, cruciately four-celled as in Pucciniastrum, 
linearly many-celled as in Phragmidium and especially in 
Xenodochus (see also Fig. 23). But it is misleading to speak 
of a many-celled spore: each cell, taken separately, is a spore 
and can germinate by itself without reference to the others. 
3—2 
