BrachytripJiragnimin. 2 1 9 



their expansion, more rarely in compact, extended sori on the 

 under surface of the leaves. Spores brilliant orange, finely 

 verrucose, globose, oval, or ovate, pedicellate, 18-24 x i7-22/>i. 



Secondary nredospores—ln summer and autumn. Sori hypophyll- 

 ous, small, round, orange. Spores globose or elliptical, finely 

 echinulate, orange-yellow, 18-30 x 18-28/x. 



Teleiitospores — Sori small, round, black, persistent, but pulverulent, 

 on the leaves and petioles. Spores globose, rough, with obtuse 

 warts, chestnut-brown, 35-50/A in diameter. Pedicels colour- 

 less, persistent- 

 ly ^^^^zywi". 



Triphragmium tilmarice (Schum.). Winter in Rabh., " Krypt. 

 Flor.," voL i. p. 225. 



Uredo ulmarice. Schum., " Enum. Plant. Ssell.," vol. ii. p. 227. 



Uredo effusa. Berk., " Eng. Flor.," vol. v. p. 381. Grev., t. 19. 



Piiccinia ulmari(z, D. C. " Eng. Flor.," vol. v. p. 368. Grev., 

 "Flor. Edin.," p. 433. Johnst., "Flor. Berw.," vol. ii. p. 194. 



Puccinia spirccce. Purton, " Midi. Flor.," vol. iii. p. 304. 



Uromyces ulmaritz, Lev. Cooke, " Micro. Fungi," 4th edit., 

 p. 212, t. vii. figs. 147^ 148. 



TriphragDiiinn uliiiarice, Link. Cooke, " Hdbk.," p. 492 ; 

 " Micro. Fungi," 4th edit., p. 202, t. iii. fig. 48. 



Exsiccati. 



Berk., 343. Cooke, i. 23, 75 ; ii. 146, 212 ; " L. F.," 4, 25. 

 Vize, "Fungi Brit.," 136. 



On SpircBa ulmaria. 

 May to October. 



Biology. — It is not difficult to find the teleutospores still attached 

 to the foliage in spring. These will germinate very readily if placed 

 in water. 



Triphragmium filipendulae. (Lasch.) 



Primary uredosporcs — Spores oblong or pyriform, often as much 



as 35/t long. 

 Secojidary uredospores — Sori scattered, roundish, at first covered 



by the epidermis, then surrounded by it, orange. Spores 



globose or ovate, pedicellate, orange. 



