Hcfcropitccinia. 1 8 i 



Telcuiospores—^on 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 x 15-20/A. 

 Pedicels short, very persistent. 



Syiiotiym. 

 ^cidiiim ranunciilacearum, var. thalictri-flavi. D. C, " Floie 

 fran(;.," vol. vi. p. 97. Winter, " Krypt. Flor.," p. 269. 



^cidiospores on Thalictnim flainim and minus (?), May ami 

 June. 



Uredospores on Trificum repens {Avetia elafior}), July and 

 August ; teleutospores, August to July. 



Biology.— The aecidiospores were found by Mr. T. Birks near 

 Goole, in June, 1884, growing near a plant of Ai'e/ia elatior, affected 

 with an orange Uredo with paraphyses. I was, however, unable to 

 produce the Uredo on A. elatior, either from Mr. Birks' aecidiospores, 

 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 Ihalic- 

 trtiin flavum, which had been growing in my garden since 1884, the 

 y^cidium appeared in due course. In July, 1888, the tecidiospores, 

 applied to a plant of Tritictim repens, gave rise to the Uredo in 

 twelve days. 



Puccinia extensicola. Plow 



yEcidiospores — 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, 20-2 5/A 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 15-20/x. 



Teleutospores — Sori small, -5 to i mm. long, elongated, erumpent, 

 black, surrounded by the torn epidermis. Spores ovate or 

 subclavate, brown, smooth, apex thickened, often hooded, 



