64 
did not retain their continuity, but were subdivided into four or six 
unequal-sized cells, by means of transverse septa; there then appeared 
upon each of these cells, and particularly of the upper ones, a lateral 
short process (spicula), which soon supported an obovate and rather 
oblique tubular process. These tubes were the last vegetative effort 
of the spores; they became free (?), and produced only very slender 
filaments. Upon the separation of these bodies, the jointed tube 
from which they arose is emptied, and, like the spores, is destroyed ; 
so that this sacculus or filament represents a sort of promycelium, a 
vegetation which intervenes between the primary spore or fruit, and 
those lesser follicles which are either secondary spores, or rather, 
perhaps, the only true and actual producers of the mycelium. 
The same thing takes place in Puccinia, the spores of which are 
capable of germination while yet upon the parent plant. The spores 
of Puccinia graminis throw out tubes by which they lengthen two 
or three times, divide into cells and again produce reniform spores, 
which soon germinate. It is exactly the same in Phragmidium in- 
crassatum, Link. 
The Podisomata, also belonging to the Uredinex, throw out from 
their two-sided fruits (sporidia) as many as eight tubular processes, 
crossing each other in pairs and superimposed one upon the other, 
which invest the fungus with a sort of pile; each of these produces 
several obovate spores, which may be collected in vast quantity. 
In several Uredinee (U. Rose suaveolens, Tussilaginis crassum), 
the tubular processes are capable of branching, and bear a still closer 
resemblance to a normal fungoid mycelium. 
The spermogonia of the Uredinez are highly aromatic. It is to 
them that is due the odour of Uredo suaveolens, &c. 
M. Tulasne has not yet accurately investigated the germination of 
the spores of the Ustilaginez. The elongated cell, which proceeds 
from the spores of Ustilago antherarum, Tal., is probably analogous to 
the secondary spores of Acidium and Puccinia. 
In Ustilago receptaculorum, F7., organs, without doubt analogous 
to these secondary spores, are produced from a slightly-developed 
promycelium, consisting only of a few cells, but resembling that of 
AEcidium Euphorbie sylvestris, D.C. 
