80 Witson: NortH AMERICAN PERONOSPORALES 
On ALLIONIACEAE : 
Boerhaavia anisophylla A. Gray, New Mexico, Wooton 462. 
? Boerhaavia diffusa L., McComb’s Expedition, Newberry. 
Boerhaavia erecta L., Florida, Swingle 417 395 Sonora, Palmer ; 
Jamaica, Harris 6853 ; St. Croix, Ricksecker got. 
Boerhaavia hirsuta Willd., Texas, * Long (Fungi Columb. 
1605, on “ B, decumbens”); Yucatan, Gaumer jog ; Cuba, 
Britton & Shafer 1; Guadeloupe, Duss 2174; Porto Rico, 
Goll 536. 
Boerhaavia paniculata Rich., Culebra, Britton & Wheeler 2. 
Boerhaavia spicata Choisy, Arizona, Griffiths 2071; New 
Mexican, Wooton. 
Boerhaavia Xanti S. Wats., Sonora, Palmer. 
Wedelia incarnata (L.) Kuntze, Arizona, Rusby ; New Mexico, 
Skehan 102, Wooton ; Texas, Seler rgor; Utah, Goodding 
809 ; San Luis Potosi, Schaffner 562. 
Reported from within our limits on the following additional 
hosts: Boerhaavia Sonorae Rose and B. viscosa Lag. & Rodr. 
Type Locauity: Buenos Aires, Argentina, on Boerhaavia 
hirsuta Willd. 
Distripution: Utah to peninsular Florida, southern Mexico 
and the West Indies. Also in South America, Asia and Africa. 
12. Albugo occidentalis sp. nov. 
Soris hypophyllis, subrotundis vel irregularibus, rarius con- 
fluentibus, superficialibus, prominentibus, subflavidis, 1-3 mm. 
ad medium annulo cincta; oosporis in hospitis foliis, globosis, 
luteo-brunneis, regulariter tenuiterque reticulatis, 50-60 di- 
ametro, areolis pentagonis vel hexagonis, circa 2 p- crassis. 
Sori hypophyllous, rounded or irregular in outline, sometimes 
confluent, superficial, prominent, yellowish, I-3 mm.; conidio- 
phores cylindric, about 12 x 40; conidia discoid, the mem- 
brane hyaline with an equatorial thickening, contents yellow, 
14-20 x 8—16 4; odspores borne in the leaves of the host with the 
conidia, globular, 50-6o yp, yellowish-brown, very closely and shal- 
lowly reticulate, areolae about 2 L. 
Type in herbarium of the New York Botanical Garden, LZ. M. 
Underwood & A. D. Selby 108, from the hills about Box Cafion, 
