DESCRIPTIONS OF THE BRITISH 
USTILAGINE#. 
USTILAGINEZ. Schréter. 
FunG1 parasitic in the tissues of living plants. Mycelium 
widely spreading, but soon vanishing. Teleutospores produced 
in the interior of mycelial branches, which often become gelati- 
nized. Germination of the spores by a promycelium and pro- 
mycelial spores (sporidia), or by continuous sprouting, after the 
manner of yeast-spores. 
Ustilago. Pers. 
Teleutospores simple, produced in the interior of much gela- 
tinized swollen hyphz; when mature forming pulverulent masses. 
Germination by a septate promycelium, which produces pro- 
mycelial spores (sporidia) both laterally and apically, but principally 
the former. 
* Teleutospores smooth or obscurely punctate. 
Ustilago longissima. (Sow.) 
Forming long parallel lines, mostly on the upper side of the leaves, 
soon pulverulent, olive-brown. Teleutospores globose, some- 
times discoid, often irregular, pale olive-brown, smooth, 3‘5-4p 
in diameter, 6-74 long. Promycelia very short. 
Synonyms, 
Ustilago longissima, Winter in Rabh., “Krypt. Flor.,” vol. i. 
p. 85. 
