Young: Studies in Porto Rican Parasitic Fungi 43 
5. Cercospora Mucunae Syd. Bibl. Hedwigia 42: 136. 1903 
On leaves of Muciina pruriens in Porto Rico : Anasco, 3601; 
San German, ^50; Utuado, 4685, 4691; Dos Bocas below Utuado, 
d 555 » 6009; Mayagiiez, 3951; Anasco, 3535; Rosario, 3779, 4704; 
Monte Alligrillo, 4779; Rosario, 4806; Utuado, 4929. 
6. Cercospora rosicola (Pass.) Sacc. Fungi Ital. pi. 663 
On leaves of Rosa in Porto Rico : Maricao, 3447, 737, 4806. 
7. Cercospora Bloxami Berk. & Br. 
Spots spherical to ovate, 2-5 mm. in diameter, sordid-white to 
yellowish-brown, margin slightly darker ; conidiophores fascicu- 
late, simple, fuscus, paler at the tips, conidial scars evident, 1-2- 
septate, 75.6-162 X S-4-7-2 jU. ; conidia elongate-fusiform, acumi- 
nate at one end, 5-7-septate, hyaline, 50.4-144 X 2.7-3.611. 
On leaves of Brassica rapae and B. napi in Porto Rico ; Quebra- 
dillos, 5121 ; Bayamon, 449. 
This differs from C. Armoraciae and C. hrassicola in size and 
shape of conidia, and in size of conidiophores. 
The original description of Cercospora Bloxami on Brassica 
is very meager, lacking in many of the essential characters and 
measurements. The present emended description is drawn from 
the Porto Rican specimens. 
8. Cercospora H\tdropiperis (Thiim.) Speg. Anal. Soc. Sci. 
Argent. 1 : 191. 1867 
H elminthosporium Hydropiperis Thiim. Myc. Univ. n. 1087. 
Cercospora Polygonorum Cooke, Hedwigia 17 : 39. 1878. 
On leaves of Polygonum punctata in Porto Rico : Utuado, 4586, 
4578; Coamo, 91; , 91; Corozal, 419; Ciales, 27; Mayagiiez, 
1154 - 
9. Cercospora Lepidii Peck, Ann. Rep. N. Y. State Mus. 35 : 
140. 1884 
On leaves of Lepidium sp. in Porto Rico : Mona Island, 6332. 
