170 British Ui'ediiiecB and Ustilaginea;. 



Trichobasis carici/ia, Berk. Cooke, '• Hdbk.," p. 493 ; " Micro. 

 Fungi," 4th edit., p. 223, t. viii. figs. 170, 171. 



Puccinia striola, Link. Cooke, " Hdbk.," p. 493 ; " Micro. 

 Fungi," 4th edit., p. 203. Berk., " Eng. Flor.," vol. v. p. 363. 



^cidinm tirticce, D. C. Berk., " Eng. Flor.," vol. v. p. 374. 

 Grev., "Flor. Edin.," p. 445. Johnst., "Flor. Berw.," vol. ii. 

 p. 206. Purton, "Midi. Flor.," vol. iii. p. 294. Cooke, "Hdbk.," 

 p. 541 ; " Micro. Fungi," 4th edit., p. 197, t. i. figs. 10, 11. 



Exsiccati. 

 Berk., 1 1 2. Cooke, i. 67, 634 ; ii. 86, 3 1 7, 634 ; " L. F.," 2>7y^ 

 35. Vize, "Fungi Brit," 121, 159; "Micro. Fungi Brit.," 

 220, 235. 



^Ecidiospores on Urtka dioica, May and June. 

 Teleutospores on Carex hirta, riparia, paiudosa, binervis, July 

 to April. 



Biology. — In many cultures I have found the teleutospores from 

 Carex hirta produce the aecidiospores on Urtica dioica, and the aecidio- 

 spores produce the uredospores in from eight to fourteen days. It is 

 interesting to note that Surgeon-Major Barclay has described a Lepto- 

 puccinia on Urtica parvifoli a in India (" Scientific Memoirs by Medical 

 Officers of the Army in India" (1887), p. 10, t. v. figs. 18, 19). 



Puccinia arenariicola. Plow. 



yEcidiospores — Spots circular on the leaves, elongated on the 

 stems, yellow, surrounded by a purple margin. Pseudoperidia 

 mostly hypophyllous, rarely epiphyllous, edges whitish, promi- 

 nent, torn, everted. Spores subglobose or polygonal, nearly 

 smooth, yellow, 15-20/x in diameter. 



Uredospores — Sori brown, erumpent, linear or oblong, about 5 mm. 

 long, surrounded by the torn epidermis, seated on yellowish 

 spots. Spores globose or ovate, brown, finely echinulate, 

 18-20/X, in diameter. 



Teleutospores — Sori small, black, naked, persistent, linear or 

 elongate, mostly hypophyllous. Spores smooth, dark brown, 

 oblong or cuneiform, the upper cell usually darker, rounded, 

 and thickened above, lower cell somewhat attenuated, con- 

 striction slight, 40-50 X 20/x. Pedicels long, persistent. 



