342 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Ustilago tecta hordei Jens., Ann. Rep. Ivans. Agr. Exp. Sta., 2: 269. 1890. 
Ustilago Jensenii Rostr., Overs. Kong. Dankse Vid. Selsk. Forh., 12. 
1890. 
Exsiccati: Ustilago Hordei (Pers.) Kell. & Sw., on Hordeum sp. cult., 
Seym. & Earle, Econ. Fungi, 82 b, Seym. & Earle, Econ. Fungi, Clinton 
Ust. Supp., C 69, Ell. & Ev., Fungi Col., 1484, Kell., Ohio Fungi, 40, 
Griff., West Amer. Fungi, 28, 23 a ; Ustilago segetum f. Hordei, on Hordeum 
vulgare, Ell., N. A. Fungi, 1091. 
Sori in spikelets, forming an adhering purple black spore mass, 
about 6-10 mm. in length, covered rather permanently by the trans¬ 
parent basal parts of glumes ; spores lighter colored on one side, 
usually subspherical or spherical, smooth, 5-9 /x, rarely most elon¬ 
gated 9-11 /x in length. 
Hosts: Hordeum, sps. cult., Calif., Colo., Conn., Ia., Ill., Ind., 
Ivans., Mass., Me., Mich., Miss., Mo., X. Dak., X. H., X. \ ., Ohio, 
Ore., S. Dak., Vt., Wash., Wise. ; Can. ; Mex.; Xova Scotia. 
It is difficult to determine exactly the synonymy of the two smuts 
of barley, as botanists considered them as one species until recently. 
The one described here is apparently not so common in this country 
as the other, though both are often found in the same field and are 
to be expected in any region where barley is grown. Ivellerman 
and Swingle, Brefeld, and others have described the germination of 
the spores. Literature: 27, 88, 89, 94. 
Ustilago levis (Kell. & Sw.) Magn. 
Ustilago Avenae y ar. levis Kell. & Sw., Ann. Rep. Ivans. Agr. Exp. Sta., 
2 : 259. 1890. 
Ustilago Kolleri Wille, Bot. Not., 1893 : 10. 1893 
Ustilago levis Magn., Abh. Bot. Ver. Prov. Brand., 37 : 69. 1896. 
Exsiccati: Ustilago Avenae (Pers.) Jens., on Avena sativa , Griff., West 
Amer. Fungi, 27; Ustilago levis (Kell. & Sw.) Magn., on Avena sativa , 
Seym. & Earle, Econ. Fungi, Clinton Ust. Supp. C 72 ; Ustilago segetum 
f. Avenae, on Avena sativa , Ell., N. A. Fungi, 1092. p. p. ? 1 
Sori in spikelets, forming a black brown adhering spore mass, 
sometimes small and entirely concealed by the glumes but usually 
1 Said to be Ustilago levis by Ivellerman and Swingle but the specimens exam¬ 
ined by the writer were Ustilago Avenae. It is very likely that these species 
occur more or less mixed in exsiccati. 
