284 
Journal of Agricultural Research 
Vol. II, No. 4 
SUMMARY 
(1) Only 2 out of 11 species and 2 varieties of Fusarium on sweet potato 
(Ipomoea batatas Poir.) developed the perfect form: Hypomyces ipomoeae 
(Hals.) Wollenw. [ — Nectria ipomoeae Hals. = Creonectria ipomoeae (Hals.) 
Seav.] and Gibberella Saubinetii (Mont.) Sacc. 
(2) The other species of Fusarium on sweet potato remain in the genus 
Fusarium Lk., and belong to the sections Martiella, Elegans, Discolor, 
Gibbosum, and Roseum. 
(3) Fusarium orthoceras App. and Wollenw., F. oxysporum (Schlecht.), 
F. incarnatum (Rob.) Sacc., F . culmorum (W. G. Sm.) Sacc., and F. 
acuminatum Ell. and Ev. are common but not obligate sweet-potato 
fungi. The first two are especially prevalent. These five are also found 
on Solanum and other hosts. F. oxysporum is proved a cause of wilt 
disease of Solanum, but not of Ipomoeae. 
(4) Fusarium batatatis Wollenw. and F. hyper oxysporum Wollenw. 
causing wilt disease on Ipomoea (according to Harter and Field) are 
species of the section Elegans. The former is related to F . orthoceras, 
the latter to F. oxysporum . 
(5) Fusarium culmorum (W. G. Sm.) Sacc., synonym of F. rubiginosum 
App. and Wollenw., occurs more often on cereals, especially Triticum, 
than on Ipomoea and Solanum. 
(6) Species of Fusarium described as new: F. radicicola; F. orthoceras, 
var. triseptatum; F. batatatis; F. hyper oxysporum; F. caudatum; and F. 
caudatum , var. volutum . 
(7) New combination: Hypomyces cancri (Rutg.), n. comb. ( — Nectria 
cancri Rutg.). 
LITERATURE CITED 
1879. Reinke, Johannes, and Berthoed, Gottfried. Die Zersetzung der Kartoffel 
durch Pilze. p. 26-39, ph 1-2 • Berlin. See Unters. Bot. Lab. Univ. 
Gottingen, Heft 1. 
1879. Saccardo, P. A. Fungi Gallici lecti a cl. viris P. Brunaud, C. C. Gillet et 
Abb. Letendre. In Michelia, v. i, no. 5, p. 500-538. 
1884. Smith, W. G. Diseases of Field and Garden Crops, chiefly such as caused by 
Fungi. 353 p., 143 fig. London. 
1886. Wahreich, Woedemar. Beitrag zur Kenntniss der Orchideenwurzelpilze. 
In Bot. Ztg., Jahrg. 44, No. 28, p. 481-488; No. 29, p. 497-505. pi. 3. Also 
reprinted. 
1890. SorokinE, Nicolas. Ueber einige Krankheiten der Kulturpflanzen im Siid- 
Ussurischen Gebiet. (Russian.) 32 p., 1 pi. Kazan. (Trudy Obshch. 
Estestv. I. Kazansk. Univ., t. 22, vyp. 3.) 
1892. Haested, B. D. The egg-plant stem rot. (Nectria ipomoeae, Hals.) /wN.J. 
Agr. Exp. Sta., 12th Ann. Rpt., 1891, p. 281. 
1896. Eeeis, J. B., and Everhart, B. M. New species of fungi from various locali¬ 
ties. In Proc. Acad. Nat. Sci. Phila., 1895, p. 441. 
1897. Mattiroeo , Oreste. II genere Cerebella di Vincenzo Cesati: richerche intomo 
al suo sviluppo e alia sua sistemazione. In Mem. R. Accad. Sci. 1 st. Bologna* 
s. 5, t. 6, p. 663-684, 1 pi. 
1898. Selby, A. D. Some diseases of wheat and oats. In Ohio Agr. Exp. Sta., Bui. 
97, p. 40-42, fig. 4. 
