390 Witson: NortH AMERICAN PERONOSPORALES 
at the base, and bear a single apical conidium, below which are 
several swellings of the conidiophore which indicate the typical 
cymosely branched conidiophore upon which the majority of con- 
idia have failed to develop. This species, first described by Dr. 
Thaxter, has attracted the attention of various mycologists, among 
them Dr. Clinton, who has recently published a very complete 
discussion of this destructive parasite of the lima bean.* His 
article is accompanied by illustrations of the odspores and a com- 
plete bibliography of the species. 
ON FABACEAE: 
Phaseolus lunatus L., Connecticut, Clinton (Fungi Columb. 
1949), Korer (Funghi Par. Piant. Colt. 357), Thaxter 
(Econ. Fungi 9, N. Am. Fungi 2707); Delaware, 
Jackson 1554. 
Type tocarity: New Haven, Connecticut, on Phaseolus 
lunatus LL. 
Distripution: Connecticut to Maryland. Also in European 
Russia. 
Icones: Rep. Conn. Agr. Exp. Sta. 1900: pl. 3. f. 29-373 
1905: p/. 20-22; Bull. N. J. Agr. Exp. Sta. $5 %.10. fF: 6: 
2. PuyroputHora CorocasiAE Racib. Parasit. 
Algen u: Pilze Javas 1: 9. 1900 
This species, which is very closely related to P. Phaseoli, is 
said, by its author, to be very abundant on the taro, Colocasia anti- 
quorum, throughout Java, but apparently not damaging the host. 
The fungus is to be expected in other tropical countries in which 
the host is cultivated. 
3. PoyropnTHora NIcoTIANAE Van Breda de Haan, Meded. 
Lands Plant. 15: 41. 1896 
The present species, which is illustrated and described in great 
detail by its author, is a serious tobacco pest in the East Indies 
and may appear elsewhere at any time. 
4. PHYTOPHTHORA CacToruM (Lebert & Cohn) Schréter, 
in Cohn, Krypt. Fl. Schles. 3': 274. 1886 
Peronospora Cactorum Lebert & Cohn, Beitr. Biol. Pflanz. 11: 56. 
1870. 
SUNT W auger nnsmcens ne es nl ee 
*Ann. Rep. Conn. Agr. Exp. Sta. 1905: 278-303. p/. 20-22. 1906, 
