” ‘THECOPSORA 369 
Uredo Padi K. et S. exsice. 187. Cooke, Handb. p. 527. 
U. porphyrogenita Kze. ; Cooke, Micr. Fung. p. 216. 
Melampsora Padi Cooke, Handb. p. 523 (1871). Plowr. Ured. p. 246. 
Fung. Fl. Yorkshire, p. 184. 
Pucciniastrum Padi Dietel in Eng. u. Prantl, Natiirl. Pflanz. i. 1**, 
p. 47. Fischer, Ured. Schweiz, p. 463, f. 303; Centralbl. f. 
_ Bakter. 2. xv. 227. 
Thecopsora areolata Magn. in Hedwigia, 1875, p. 123. Sacc. Syll. 
vii. 764, 
Spermogones. Whitish, pustular, flat, open, exhaling a 
strong smell. 
4icidiospores. Aicidia crowded, covering on the upper 
(sometimes the under) side the lower 
part of the scales of the fallen cones, 
hemispherical or polygonal; peridium 
thick, brown, woody, opening by a 
slit; spores oval, inequilateral, yellow, 
21—28 x 1720; epispore very 
thick (up to 6), echinulate, with a 
narrow, thinner, smooth stripe. 
Uredospures. Sori hypophyllous, 
clustered on spots 1—5 mm. wide Fig. 276. Th. Padi. a, leaf 
which are brownish above, reddish of P. Padus, showing uredo- 
; sori; b, scale of cone of Picea 
or purplish below, and more or less excelsa, showing wxcidia (both 
bordered by the veins, covered by the ee 
epidermis and by a peridium which 
opens at the summit by a pore; spores oblong-oval or irregular, 
echinulate, pale-yellowish, 15—21 x 10—14; epispore about 
13 thick. 
Teleutuspores. Developed in the epidermal cells, several in 
each, epiphyllous or occasionally hypophyllous, forming dark- 
brown shining crusts which are bounded by the veins; spores 
oval-cylindrical or prismatic, 22—30 x 8—14 y, divided by thin 
longitudinal walls into 2—4 cells; epispore thin, slightly 
thickened above, clear-brown, smooth, with a germ-pore in the 
upper and inner corner of each cell.. 
Acidia on cones of Picea excelsa, Scotland, Yorkshire, 
August, November; uredo- and teleutospores on Prunus Padus, 
August, September. Very rare. (Fig. 276.) 
G. U. 24 
