CLINTON: NORTH AMERICAN USTILAGINEAE. 
381 
have the axis of inflorescence infested so that the flowers are 
involved with it in an elongated smutted body. This species in its 
spore characters is very near Ustilago Parlatorei. It was reported 
in the writer’s previous list as Ustilago Kilhneana Wolff, but a 
more careful comparison shows that the spores have coarser and 
more prominently winged reticulations than that species. 
Ustilago Parlatorei Fisch. d. Waldh. 
Ustilago Parlatorei Fiscli. d. Waldh., Hedw., 15 : 177. 1876. 
Exsiccati: Ustilago Parlatorei Fisch. d. Waldh., on Bumex Britan- 
nica, Ell. & Ev., N. A. Fungi, 2701, Rab.-Wint.-Paz., Fungi Eur., 4009, 
Syd., Ust., 112. 
Sori in stems, petioles and midribs, often extensive and causing 
more or less distortion and swelling of infected parts, upon rupture 
of enclosing tissues disclosing dark violet dusty spore mass ; spores 
violet, often with reddish tinge, ovoid to chiefly subspherical or 
spherical though rarely more irregular or elongated, with numerous 
rather regular reticulations (about 2 a wide and 1-2 u deep), chiefly 
12-16 n in length. 
Hosts : Unimex JSritannica , Mo., Neb.; U. Mexicanus , Hex. 
The specimens of this species issued in exsiccati from North 
America differ slightly from the Fischer de Waldheim specimen in 
Rab. Fungi Eur., no. 2291, the spores being more regular and aver¬ 
aging somewhat larger. The species is very closely related to the 
preceding, also on Rumex, the chief difference, apparently, being in 
the parts infected. 
* * * 2 Spores lilac to purple, smooth or granular to echinulate. 
Ustilago Koenigiae Rostr. 
Ustilago Koenigiae Rostr., Medd. om Greenland, 3 : 532. 1888. 
Sori on stems and sometimes on leaves, forming subspherical to 
linear pustules, upon rupture disclosing somewhat dusty purplish 
spore mass ; spores very light violet, irregular, oblong to spherical, 
apparently smooth but under -an immersion lens showing very 
minute oblique striae, chiefly 6-9 /x, most elongated rarely 12 //,, in 
length. 
Host: Koenigia Islandica , Greenland (type). 
