Fleteropuccinia. 181 
Teleutospores—Sori small, black, oval, oblong, or linear, long 
covered by the epidermis. Spores cylindrical or clavate, apex 
slightly thickened, rounded, truncate, or obliquely attenuated, 
constriction sometimes marked, sometimes almost absent, 
lower cell attenuated below, smooth, brown, 50-60 xX 15-20. 
Pedicels short, very persistent. 
Synonym. 
cdium ranunculacearum, var. thalictriflavt. WD, C., “ Flore 
frang.,” vol. vi. p. 97. Winter, ‘ Krypt. Flor.,” p. 269. 
4Ecidiospores on Zhalictrum flavum and minus (?), May and 
June. 
Uredospores on Triticum repens (Avena elatior?), July and 
August ; teleutospores, August to July. 
BIOLOGY.—The zcidiospores were found by Mr. T. Birks near 
Goole, in June, 1884, growing near a plant of Avena elatior, affected 
with an orange Uredo with paraphyses. I was, however, unable to 
produce the Uredo on J. e/atior, either from Mr. Birks’ zcidiospores, 
or from Specimens collected near King’s Lynn in 1888. The teleu- 
tospores were found in June, 1888, on a piece of dead grass of the 
previous season, germinated, and when applied to a plant of 7halic- 
trum flavum, which had been growing in my garden since 1884, the 
Ecidium appeared in due course. In July, 1888, the zecidiospores, 
applied to a plant of 7riticum repens, gave rise to the Uredo in 
twelve days. 
Puccinia extensicola. Plow 
Azcidiospores—Pseudoperidia on paler spots (which are more or 
less circular on the leaves, and elongate on the stems), erect, 
circinating or scattered, often amphigenous, margins torn, 
white, everted. Spores globose, very finely echinulate, orange- 
yellow, 20-25 in diameter. 
Uredospores—Sori small, reddish brown, elongate, elliptical or 
linear, on rather extensive though pale discoloured spots. 
Spores subglobose or ovoid, rather irregular, very finely 
echinulate, brownish with a tinge of yellow, 25-30 X 15—20p. 
Teleutospores—Sori small, *5 to 1 mm. long, elongated, erumpent, 
black, surrounded by the torn epidermis. Spores ovate or 
subclavate, brown, smooth, apex thickened, often hooded, 
