68 Witson: NortTH AMERICAN PERONOSPORALES 
Brassicaceae sp., Montana, Anderson. 
The following additional hosts are reported within our limits: 
Arabis glabra (L.) Bernh., Brassica Napus L., B. oleracea | 
Cakile edentula (Bigel.) Hook., Cheiranthus sp. cult., Coronopus 
sp., Draba caroliniana Walt., Lepidium campestre (L.) R. Br., L. 
sativum \.., Roripa Nasturtium (L.) A. S. Hitchcock, and Simapis 
alba L. 
Type Locaity : Europe, on 7h/aspi Bursa-pastoris L. = Bursa 
Bursa-pastoris (L.) Britton. 
DistripuTion: Southern Canada to Mexico, Bermuda, and 
the West Indies. Also in South America, Europe, Asia, Africa, 
Australia, and New Zealand. 
_ 2. Albugo sibirica (Zalew.) 
Cystopus sibiricus Zalew. Bot. Cent. 15: 222. 1883. 
No material of this species has been examined. It is known 
only from the original description, where it is recorded from some 
species of Boraginaceae from Siberia erroneously referred by Baron 
von Thiimen to Echinospermum Lappula. It is said to differ from 
A. candida in its smaller measurements and in the structure of the 
epispore of the odspore. 
3. Albugo tropica (Lagerh.) Lagerh. ined. 
Cystopus tropicus Lagerh. ; Pat. & Lagerh. Bull. Soc. Myc. France 
315323. - 18H2. eos 
This species was described from Ecuador on some meee 
species of Piperaceae. Material in the herbarium of the ee 
York Botanical Garden from the type locality, and pemes 3 
part of the original collection, is on Peperomia pellucida H.B. set 
species which is also widely distributed in the West Indies 
Central America. 
4. ABuGo IpoMOEAE-PANDURANAE (Schwein.) Swing. 
Jour. Myc. 7: 112. 1891 ; 
Aecidium Ipomoeae-panduranae Schwein. Schr. Natur. Ges. Leip- 
7 Mig Rt 6g. 1822. 
Caeoma convolvulatum Link, in Willd. Sp. Pl. 6’: 49. 1825- 
Uredo Convolvulae Spreng. Syst. Veg. ed. 16. 4: 572- 1827- 
