362 Wilson: North American Peronosporales 



Albugo Froelichiae sp. nov. 



Albugo Cladothricis G. W. Wilson, Science II. 27: 207. 1908. 

 (Hyponym). 



Soris hypophyllis vel in caulibus, superficialibus prominenti- 

 busque, albis vel subflavidis, subrotundis vel irregularibus, 1-3 

 mm. latis; conidiophoris subfusiformibus, elongatis, 12-18/iX/O- 

 85//; conidiis subflavidis, breviter ellipticis, terminalibus minon- 

 bus, globosis, 10-18 ft x 12-20//, membrana subflavida, ad medium 

 annulo cincta ; oosporis in foliis hospitis, brunneis, globosis, 45- 

 80 n ; episporis irregulariter vel regulariter reticulatis, areolis circa 



7 P latis. 



Sori hypophyllous or caulicolous, prominent, superficial, white 



or light yellowish, rounded or irregular in outline, 1-3 mm.; con- 

 idiophores long, somewhat fusiform, 1 2- 1 8 fi x 70-8 5 ft '^ conidia 

 uniformly light yellow throughout, short-elliptic, 

 18 fi, the terminal smaller, globose, the membrane with an equa- 

 torial thickening ; oospores produced in the leaves of the host, 

 globose, 45-80 fi, averaging 70/-/; epispore dark brown, rather 

 opaque, coarsely and irregularly, or even regularly reticulate, 

 areolae about 7 fi. 



Type in herb. Wilson and duplicate in the herbarium of the 

 New York Botanical Garden, collected by W. H. Long, at Den- 



o- 



Moq 



On Amaranthaceae : 



Cladothrix lanuginosa (Moq.) Nutt., Kansas, Hitchcock 4 

 New Mexico, Wooton ; Mexico, Berlandicr. 



Froclichia campestris Small, Texas, * Long [Fungi Colu 

 2407, " on F. fioridiana (Moq.) Nutt."]. 



Froclichia gracilis Moq., Texas, * Long (type). 



Distribution : Kansas to Mexico. 



The present species is very closely related to A. Bhti an ^ 

 platensis, but is distinguishable from the former by its yello* 

 sori and its yellow conidia, while it is easily separated troni ^ 

 latter by its conidia, which are brighter yellow, and never s ° 

 the dark ring of that species. The conidia also separate it 

 the preceding species, to which it is closely related. The com ' 

 phores are unique within the genus for their fusiform outline, 

 oospores are very similar to those of A. Bliti but are larger in si 



ish 

 the 



