202 
Mycologia 
1. Peronospora effusa (Grev.) Ces. in Rab. Herb. Viv. Myc. I. 
1880. 1854 
Botrytis effusa Grev. FI. Edin. 468. 1824. 
Peronospora effusa a major Casp. Monatsb. K. Preuss. Akad. 
Wiss. 1855: 3 2 8- 1855. 
Peronospora Spinaciae Detmann, Bot. Cent. 105 : 25. 1907. 
Hosts: America, Chenopodium album, C. hybridum, Mono- 
lepis Nuttalliana, Spinicia oleracea. Europe, Chenopodium poly- 
spermum, C. hybridum, Spinacia oleracea. 
Most abundant on Spinacca oleracea. 
2. Peronospora farinosa (Fries) Keissler, Ann. K. K. Naturh. 
Hofm. Wein25: 229. 1911 
Botrytis farinosa Fries, Symb. Myc. 3: 404. (Excl. synonymy.) 
1823. 
Erineum atriplicinum Nestler; Fee, Mem. Phyll. et Erineum 59. 
1834. 
Peronospora Chenopodii Schlecht. Bot. Zeit. 10 : 619. 1852. 
Monosporium Chenopodii Schlecht. Bot. Zeit. 10: 619. 1852. 
? Peronospora Chenopodii Casp. Bot. Zeit. 12 : 565. 1854. 
Peronospora effusa /? minor Casp. ; Rab. Herb. Viv. II. IJ2. 
1855. 
Peronospora epiphylla Pat. & Lagerh. Bull. Soc. Myc. France 7 : 
167. p. p. 1891. 
Hosts: America, Chenopodium album, C. hybridum, C. lepto- 
spermum, Europe, Atriplex patulla, Chenopodium album, C. 
Bonus-Henricus, C. glaucum, C. hybridum, C. Murale, C. rubrum, 
Spinacia oleracea. Asia, Chenopodium album. 
Most abundant on species of Chenopodium and Atriplex. 
Species of Peronospora which infest Euphorbiaceae 
Four species of Peronospora have been described from hosts 
of the family Euphorbiaceae. The first of these was P. Pepli 
Durieu 9 which was found in France on Euphorbia Peplis L. 
While the author does not give a formal description of his plant 
he speaks of the conidiophores in a way to bear out his statement 
0 Ann. Soc. Linn. Bordeaux 20: — (13). 1855. 
