76 Witson: NortH AMERICAN PERONOSPORALES 
Senecio oblanceolatus Rydb., Colorado, Demetrio (N. Am. 
Fungi 2208, on “S. aureus.” The host is mixed but 
chiefly as cited here). 
Senecio peninsularis Vasey & Rose, Baja California, *Padmer 
659. 
Senecio serra Hook., Montana, *Kelsey ; Washington, *Piper. 
On CICHORIACEAE: 
Tragopogon porrifolius L., Massachusetts, Farlow (N. Am. 
Fungi 2056); New Jersey, Halsted (Econ. Fungi 445); 
New Mexico, * Mulford r285a ; New York, Arthur, Under- 
wood, 
The following additional hosts are reported within our limits: 
Antennaria plantaginifolia (L.) Richards., Artemisia canadensis 
Michx., Gaertneria discolor (Nutt.) Kuntze, Senecio aureus L., S. 
lugens Richards., and S. serra integriusculus A. Gray. 
Type Locatity: Europe, on 7ragopogon porrifolius L. 
DistrisuTion : Newfoundland to Washington, Baja California 
and Alabama. Also in South America, Europe, Asia, Africa and 
Australia. . ; 
8. ALBUGO QUADRATA (Kalchb. & Cooke) Kuntze, Rev. 
Gen. Pl. 2: 658. 1891 
This species is known only from Cape Colony, where it was 
collected on Herpestis verticillaris Nees by McOwen. The conidia 
are most nearly like those of A. Tragopogonis, but in the absence 
of oospores it is impossible satisfactorily to refer the species to a 
place in the genus. 
9. Albugo Tillaeae (Lagerh.) 
Cystopus Tillacae Lagerh.; Pat. & Lagerh. Bull. Soc. Myc. France 
Ss 167... 2861. 
No material of this species has been examined ; but the descrip- 
tion indicates a close relationship with A. Bit. It is known only 
from Quito, Ecuador, the type locality, where it occurs on Zi//aea 
rubescens H.B.K. Species of this genus occur sparingly in 
tropical America. 
