362 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
Ustilago heterogena P. Henn. 
Ustilago heterogena P. Henn., Hedw., 43 : 155. 1904. 
Sori at nodes of the stem involving the axial growths and trans¬ 
forming them entirely or their base into a conspicuous tumor, ovate 
to elongated lanceolate, often 40 by 15 mm., covered by the thick, 
smooth envelope of plant tissues, finally rupturing and disclosing a 
brown black semi-agglutinated to dusty spore mass ; spores medium 
to dark reddish brown, chiefly ovoid to spherical, conspicuously 
echinulate, 10-14 p, rarely 16 p, in length. 
Host: Leptochloa scabra , La. 
These specimens were collected sparingly on escaped plants of 
the host near New Orleans by S. M. Tracy. The smut comes as 
near Ustilago Crus-galli as to any of our species, but is distinguished 
from this by the larger sori with a smooth covering and perhaps by 
darker spores. Apparently when young, the sori are sometimes con¬ 
cealed by the leaf sheath through which they may eventually break. 
The fungus is evidently the same as Ustilago heterogena on Lep¬ 
tochloa virgata , described by Hennings from S. America since the 
above description was written. Hennings states that various parts 
of the host are attacked and vary in size as with Ustilago Zeae. 
Ustilago Zeae (Beckm.) Ung. 
Lycoperdon zeae Beckm., Hannov. Mag., 6 : 1330. 1768. 
Uredo segetum 8 Mays zeae DC., FI. Fr., 2: 596. 1805. 
Uredo segetum p. Zeae Mays DC., Encyc. Meth. Bot., 8 : 229. 1808. 
Uredo maydis DC., FI. Fr., 6 : 77. 1815. 
Uredo Zeae Schw., Fung. Car., 71 (45). 1822. 
Caeoma Zeae Lk., Sp. PL, 6 2 : 2. 1825. 
Erysibe Maydis Wallr., FI. Crypt. Germ., 2 : 215-6. 1833. 
Ustilago zeae Ung., Einfl. Bodens, 211. 1836. 
Ustilago Maydis Cda., Icon. Fung., 5: 3. 1842. 
Ustilago Schweinitzii Till., Ann. Sci. Nat., Bot., hi, 7 : 86. 1847. 
Ustilago Zeae-Mays Wint., Rab. Ivrypt. FI., I 1 : 97. 1881. 
Ustilago Euchlaenae Arcang., Erb. Critt. Ital., ii, 1152. 1882. 
Ustilago Mays zeae Magn., Deutscli. Bot. Mon., 13 : 50. 1895. 
Exsiccati: Ustilago Maydis (DC.) Cda., on Zea Mays, Rav., Fungi Car., 
iv, 100, Rav., Fungi Amer., 281, Underw. & Cook, Illustr. Fungi, 55, Seym. 
& Earle, Econ. Fungi, 71 a-b, Shear, N. Y. Fungi, 135, Syd., Ust., 157, 
Griff., West Amer. Fungi, 99 ; Ustilago Zeae (Beckm.) Ung., on Zea Mays , 
Kell., Ohio Fungi, 16, Seym. & Earle, Econ. Fungi Clinton Ust. Supp., 
