Germination of Teleutospores of Ustilaginee. 81 
is markedly different from that of any of the former species. 
Winter * figures an elongated promycelium with a pro- 
mycelial spore, borne laterally upon a long pedicel. He 
found that the spores germinate freely in water, and that 
the endospore sends out a process—the promycelium—from 
the interior of the spore, which grows to 30 or 50 in 
length, but is only about 3u wide. It becomes septate, 
and gives off short lateral branches, which become spores. 
They are slightly clavate, and from 6 to 7 long.t 
Brefeld{ found that in nahrlésung they only produced 
mycelial hyphe without spores. Although I have tried 
many times, I have never succeeded in getting the teleuto- 
spores of this species to germinate. 
U, longissima (Sow.).—When the spores of this species 
are placed in water they very soon begin to germinate. 
The process, as carried on in this species, differs very 
materially from that which obtains with the previously 
mentioned species. This, as was first pointed out by 
Von Waldheim,§ consists in the protrusion of a very 
narrow straight tube through a small opening in the 
epispore. This acquires a length of about 10 or 12, 
when it becomes divided below by a septum into two un- 
equal parts (Plate VII. Fig. 14), the upper of which 
is about 6 or 8u, and the lower 3 or 4u long. The 
lower portion is, moreover, narrower than the upper, 
and is the true promycelium, the upper being the pro- 
mycelial spore. The promycelial spore soon falls off, and 
the promycelium produces, in about an hour, Von Waldheim 
says (but I have personally made no observation as to 
time), a second promycelial spore, which in like manner 
falls off, and is followed by a third (Plate VII. Figs. 15, 16). 
* Winter in Rabenhorst, ‘‘ Kryptogam, Flora,” vol. i. p. 81, fig. 4. 
+ ‘*Flora” (1876), Nos. 10, II. t Brefeld, /oc. cz¢., p. 103. 
§ F. von Waldheim, Zoe, cit., t. v. figs. 42-46. 
G 
