248 British Uredinee and Ustilaginec. 
Teleutospores—Sori vernal on last year’s living leaves, whitish or 
pinkish, often covering the whole leaf-surface. Spores spherical 
or shortly prismatic, in section polygonal, membrane thick, 
smooth, colourless, contents very pale reddish, simple, inter- 
cellular, 13-15 in diameter. Promycelial spores globose, 
8-r1o0p, colourless. 
Synonyms, 
Schrot., oc. cit., p. 366. Winter, loc. cit, p. 242. 
Uredo pustulata, var. cerastit. Pers., “ Syn.,” p. 219. 
Uredo caryophyllacearum, Johnst., “Flor. Berw.,” vol. ii. p. 
199. Berk., “Eng. Flor.,” vol. v. p. 381. Cooke, “ Hdbk.,” p. 
526; “ Micro. Fungi,” 4th edit., p. 216. 
Lixstecatt, 
Cooke, i. 6; ii. 75; “L.F.,” 30. Vize, “ Fungi Brit.” 145. 
On Cerastium arvense, Stellaria graminea, 
BIOLOGY.—We are indebted to Schroter for the life-history of this 
fungus. The uredospores first make their appearance in June, and 
are found throughout the summer until October. The teleutospores 
are found in the following year in May and June, in colourless or pale 
flesh-coloured sori on those living leaves which have survived the . 
winter. 
COLEOSPORIUM. Lév. 
Teleutospores composed of several superimposed cells enclosed 
in a thick transparent membrane, confluent in flat waxy masses. 
Each cell germinates by a single unseptate promycelial tube, 
which produces at its end a single promycelial spore, Uredo- 
spores formed in basipetal chains. 
I, EUCOLEOSPORIUM. Winter. 
Hetercecious, having spermogonia, zecidiospores, uredospores, and teleuto- 
spores, 
Coleosporium senecionis. (Pers.) 
Atcidiospores—Of two kinds. (1) On the fir needles, scattered or 
in small groups. Pseudoperidia cylindrical or laterally com- 
pressed, mouth torn irregularly, 2-2°5 mm. high. (2) On the 
