Germination of Teleutospores of Ustilaginee. 79 
immersion in water. The process has been described and 
figured by Tulasne * and Von Waldheim.t Brefeld ¢ found 
the production of the yeast-cell colonies was very prolific 
in nahrlésung, where they multiplied themselves through 
endless generations, whereas in water no budding took 
place after the second day. These yeast-spores are ovate, 
but somewhat elongated; from 5 to 7u long, and from 3 
to 4u wide. The germinative faculty lasts for about six 
weeks. The spores in water or in exhausted nahrlésung 
frequently unite in the same manner as those of U. 
segetum. 
When this fungus attacks the anthers of Lychuzs diurna, 
a plant which is usually unisexual, the styles which would 
normally be short, acute, and erect, become long and 
recurved, as they are in the female flower. This has been 
pointed out by M. Cornu, as well as by other observers. 
U. maydis—The germination of these spores was 
observed by Kiihn § and Wolff,| and does not materially 
differ from the above: the yeast-spores,? however, are 
elongated and fusiform, being from 10 to 36u long, and 
from 3 to 5m wide. 
U. scabiose (Sow.) (U. flosculorum).—The spores germi- 
nate very freely and very soon in water. According to 
Schroter ** the promycelia are three or four-partite ; about 
from 20 to 224 long, and du wide; the promycelial 
spores are about 4u long. In nahrlosung Brefeld tt found 
the yeast-spores to be from 4 to 8u long, and from 1°5 
to 24 wide. They were produced continuously and 
* Tulasne, ‘‘ 17 Mémoire,” t. iv. fig. 18. 
t+ F. von Waldheim, Joc. czt., t. xii. 
} Brefeld, Joc. ct#., pp. 36-54, t. i. figs. 1-27. 
§ Kiihn, “‘ Krankh d. Kulturgew.” p. 260, t. iii. figs. 22, 23. 
|| Wolff, ‘Brand des Getreides,” p. 11 t. i. fig. c. 
q Brefeld, oc, czt., pp. 67-75, t. iv. figs. 1-17. 
** Schroter, “ Cohn Beitrage,” vol. ii. 1877 
tt Brefeld, /oc. cit., pp. 78-81, t. v. figs. 1-6. 
