286 
Journal of Agricultural Research 
Vol. XXXI, No. 3 
Thirteen species seemed very susceptible, and are in the same class 
as the common onion. 
Smut occurred in the cotyledons of 13 more species, but did not 
kill the plants or occur in 'the true leaves. 
In five other species it occurred in the cotyledons and killed many 
of the seedlings in that stage, but did not appear in the true leaves. 
Smut did not occur in species which reproduce by bulblets. 
On this basis one might expect to find among the 250 known species 
of Allium at least 150 which are susceptible to smut. 
Urocystis ce/pulae is considered by this writer as distinct from all 
other species of Urocystis which have been reported on other mem¬ 
bers of the genus Allium. 
All the evidence the writer has indicates that this parasite lived 
originally on some wild American species and thence passed over to 
the cultivated onion. 
LITERATURE CITED 
(1) Anderson, P. J. 
1921. DEVELOPMENT AND PATHOGENESIS OF THE ONION SMUT FUNGUS. 
Mass. Agr. Exp. Sta. Tech. Bui. 4: 99-133, illus. 
(2) Clinton, G. P. 
1904. north American ustilagineae. Proc. Boston Soc. Nat. Hist. 31: 
329-529. 
(3) Cotton, A. D. 
1919. onion smut: a disease new to Britain. Jour. Bd. Agr. {London] 
26: 168-174, illus. 
(4) Farlow, W. G. 
1877. the onion-smut. Ann. Rpt. Sec. Mass. Bd. Agr. (1876) 24 (Abs. 
Agr. Soc.): 164-176, illus. 
1877. notes on some common diseases caused by fungi. Bui. Bussey 
Inst. 2: 106-114, illus. 
(6) Liro, J. I. 
1922. ueber die gattung tuburcinia. Ann. Univ. Fenn. Aboensis, 
ser. A, tome 1, no. 1, p. 50. [Not seen.] 
(7) Malbranche. 
1881. le charbon des oignons. Bui. Soc. Bot. France (s6r. 2, t. 3) 
28: 277-278. 
(8) Phippen, G. D. 
1862. {report on the onion disease.] Proc. Essex Inst. (1856/60) 
2: 207, 211-215. 
(9) Rostrup, E. 
1890. ustilagineae daniae. Festskrift Bot. Forening [Copenhagen] 
1890: 117-168, illus. 
(10) Schellenberg, H. C. 
1911. die brandpilze der schweiz. 180 p., illus. Bern. (Beitrage 
zur Kryptogamenflora der Schweiz, Bd. 3, Hft. 2.) 
(11) Thaxter, R. 
1890. the “smut” of onions. Conn. Agr. Exp. Sta. Ann. Rpt. 1889: 
129-154, illus. 
(12) Walker, J. C., and Jones, L. R. 
1921. relation of soil temperature and other factors to onion 
smut infection. Jour. Agr. Research 22: 235-261, illus. 
(13) Whitehead, T. 
1921. EXPERIMENTS ON THE GONTROL OF ONION SMUT. Jour. Bd. Agr. 
{London] 28 : 443-450. 
(14) ZlLLIG, H. 
1923. UNSERE HEUTIGEN KENNTNISSE VON ZWIEBELBRAND. Centbl. 
Bakt. (II) 60: 50-58, illus. 
