11)8 
Mycologia 
has been described from Australia by McAlpine as P. parasitica 
Lepidii, which is based upon essentially the same set of charac- 
ters. Through the courtesy of Professor McAlpine the writer 
has been enabled to examine cotype material of the Australian 
fungus which proves to be in every way identical with the Amer- 
ican form. 
The synonymy of these species and a description of the third 
one follows. No account is taken here of P . crispula Fuckel, on 
Reseda in Europe, which has frequently been referred as a syno- 
nym to P. parasitica, but which is certainly to be regarded as a 
valid species. 
1. Peronospora parasitica (Pers.) Fries, Sum. Veg. Scand. 
493 - 1*49 
Botrytis parasitica Pers. Obs. Myc. 1 : 96. 1796. 
Mucor Botrytis Sow. Eng. Fungi pi. 559. 1802. 
Botrytis nivea Mart. FI. Crypt. Erlang. 342. 1817. 
Peronospora ochrolenca Ces. in Rab. Herb. Viv. Myc. II. 775. 
1855. 
Peronospora Dentariae Rab. Fungi Europ. 86 — Flora 42 : 436. 
1859. 
Peronospora Botrytis Cocconi & Morini, Mem. Acad. Sci. 1 st. 
Bologna IV. 6: 394. 1885. 
2. Peronospora Niessleana A. Berlese, Icon. Fung. Phyc. 40. 
pi. 66, f. 1. 1898 
? Mucor Erysimi Sow. Eng. Fungi pi. 400, f. 7. 1803. 
Peronospora parisitica Niessleana A. Berlese, Icon. Fungi Phyc. 
41. 1898. 
3. Peronospora Lepidii (McAlp.) sp. nov. 
Peronospora parasitica Lepidii McAlp. Proc. Royal Soc. Victoria 
7: 221. 1895. 
Hypophyllous or caulicolous, covering the irregular and more 
or less indefinite infected area with a dense white growth ; coni- 
diophores 3-8 from a stoma, 130-223X4-971, 3-8 times branched, 
the primary branches erect, the ultimate branchlets straight or 
somewhat recurved, arising at acute angles, about 3X8 n; conidia 
broadly ellipsoid or almost globose, 15-23X 18-35 n, hyaline ; oogo- 
