Witson: NortH AMERICAN PERONOSPORALES 401 
DistRiBuTION: Massachusetts to Wyoming, Texas, and 
Georgia. 
Icon: Berlese, Icon. Fung. Phyc. p/. 72. 
2. Rhysotheca Umbelliferarum (Caspary) 
Botrytis nivea Mart.; Unger, Exanth. 171. 1833. Not 2B. xvea 
Mart. 1817. 
Botrytis macrospora Ditmar; Unger, Exanth. 173. 1833. Not 
L. macrospora Ditmar 1817. 
Peronospora macrocarpa Rabenh. Herb. Viv. Myc. I. 7772. 
1846. Not P. macrocarpa Corda 1842. 
Peronospora nivea Unger, Bot. Zeit.5: 314. 1847. Not Botrytis 
nivea Mart. 1817. 
Peronospora macrospora Unger, Bot. Zeit. 5: 315. 1847. Not 
Botrytis macrospora Ditmar 1817. 
- Peronospora Conit Tul. Compt. Rend. Acad. Paris 38: 1103. 
1854. (Nomen nudum.) 
Peronospora Umbelliferarum Caspary, Monatsb. K. Preuss. Akad. 
Wiss. 1855:—(23). 1855. 
Plasmopara nivea Schrot. in Cohn, Krypt. Fl. Schles, 3': 237. 
1886. Not Botrytis nivea Mart. 1817. 
This species is included by Harkness and Moore in their 
Pacific Coast Fungi as having been collected in the region of San 
Rafael, Calif., on an undetermined species of Umdelliferae. Since 
then no new record of the species in North America has appeared. 
That the fungus is rather widely distributed on our continent is 
not impossible as it infests a wide range of Umbelliferous hosts, 
several of which are either wild or cultivated in various parts of 
America. A good illustration of the species is given by Berlese.* 
3. Rhysotheca Epilobii (Otth) 
Peronospora Epilobii Otth, Bern. Mitth. 1868: 63. 1868. 
Plasmopara Epilobii Schrét. in Cohn, Krypt. Fl. Schles. 3': 238. 
1886 
This species is rather widely distributed in Europe on various 
species of Epilobium, but so far has not been recorded from 
America. It is illustrated by Berlese. 
*Icon. Fung. Phyc. p/. 78. 
tIcon. Fung. Phyc. p/. 74. 
