188 British Uredinee and Ustilaginee. 
III. HEMIPUCCINIA. Schrot. 
Having uredospores and teleutospores, the latter germinating only after 
a period of rest. 
Puccinia polygoni. Pers. 
Uredospores—Sori at first yellowish brown, then dark brown, 
roundish, scattered irregularly or arranged in circular groups, 
soon pulverulent. Spores spherical, elliptical, or ovate, echi- 
nulate, brown, 17-30 X 16-20, 
Teleutospores—Sori compact, blackish, generally crowded, rounded 
or elliptical, on the stems, elongated, often confluent, brown. 
Spores cuneiform or clavate, constriction slight or absent, base 
attenuated towards the stem, apex much thickened (4-7,), 
rounded, truncate, capitate or conical, smooth, brown, 30-50 
X 14-204. Pedicels about as long as the spores, persistent. 
Synonyms. 
Puccinia polygont. Pers., “‘Syn.,” p. 227. 
Puctinia polygonorum, Link. Cooke, ‘‘ Micro. Fungi,” 4th 
edit, p. 203; “Hdbk.,” p. 495. Berk., “Eng. Flor.,” vol. v. 
p- 363. Johnst., “Flor. Berw.,” vol. ii, p. 195; Grev., ‘ Flor. 
Edin.,” p. 430. 
Puccinia amphibit, Fckl. Cooke, “ Micro, Fungi,” 4th edit., 
p- 204. 
Credo polygonorum, D. C. Grev., t. 80, Berk., “ Eng, Flor.,” 
vol. v. p. 377. Johnst., “ Flor. Berw.,” vol. ii. p. 201. ~ 
Trichobasis polygonorum, Berk. Cooke, “ Micro. Fungi,” 4th 
edit., p. 226. 
Lixsiccati. 
Berk., 231, 216. Cooke, i. 27; “LF,” 5, 42. Vize, 
“Micro. Fungi Brit.,” 28; “ Fungi Brit.,” 111. 
On Polygonum convolvulus, amphibium, lapathifolium. 
June to November. 
BioLocy.—Winter (Rabh., “ Krypt. Flor.” vol. i. pp. 185, 186) 
separates the form on P. amphibium, following Fuckel, the principal 
morphological difference being that in this form the teleutospores 
remain covered by the epidermis. This is also the case when the 
fungus occurs on P. lapathifolium. On P. convolvulus the sori are 
