404 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
the perianth, forming at first a firmly agglutinated but eventually 
somewhat granular black spore mass, with inconspicuous columella; 
spores dark reddish to black brown, subopaque or opaque, com¬ 
pressed somewhat laterally and so appearing oblong to oval or cir¬ 
cular according to view, usually more or less angled, apparently 
smooth but under an immersion showing subreticulately pitted, 
20-30 jj, in length. 
Host: Luzula campestris , Ind. 
Apparently this species has been collected in this country only by 
Arthur in Indiana. It is very closely related to Cintractia Junci , 
which is not uncommon. Blytt has described another species on 
Luzula, from Europe, which is said to differ from this in the smaller 
verruculose spores. The germination of Cintractia Luzulae has not 
been reported, according to the writer’s information. 
Cintractia Junci (Schw.) Trel. 
Caeoma Junci Schw., Syn. Fung. Amer., 290. 1834. 
Ustilago Junci Curt., Cat. PI. N. Car., 123. 1867. 
Cintractia Junci Trel., Bull. Torr. Bot. Club, 12 : 70. 1885. 
Ustilago Liebmanni P. Heim., Hedw., 33: 229. 1894. 
Exsiccati : Cintractia Junci (Schw.) Trel., on Juncus tenuis , Seym. & 
Earle, Econ. Fungi, 51; Same, Clinton Ust. Supp., C 6, Ell. & Ev., Fungi 
Col., 472, Kell., Ohio Fungi, 66 ; Ustilago Junci (Schw.), on Juncus tenuis , 
Ell. & Ev., N. A. Fungi, 290, Thiim., Myc. Uni., 1622, Rab.-Wint., Fungi 
Eur., 2901. 
Sori usually linear, surrounding peduncles and pedicles for more 
or less of their length, sometimes in basal parts of the flowers and 
even occasionally filling the ovaries, forming an agglutinated black 
spore mass; sterile cells usually not evident since inconspicuous and 
early evanescent; spores black brown, subopaque, more or less 
agglutinated, somewhat compressed laterally and so showing oblong 
to irregularly polygonal or subcircular according to view, minutely 
pitted, 14-22 /x in length. 
Hosts : Juncus acuminatus , Miss.; J. effusus , N. J.; J. tenuis , 
Conn., Ia., Ill., Mass., N. J., N. Y., Ohio, Penn, (type C. Junci), 
Vt., Wise.; Juncus sp., Mass., N. Car., Mex. (type U. Liebmanni). 
This species is closely related to Cintractia Luzulae which also 
possesses pitted spores that are somewhat larger and occur in the 
ovaries of Luzula. Hennings described Ustilago Liebmanni from 
