212 MICROSCOPIC ruNai. 



Polycystis Violse, B. and Er. Yiolet Smut"; sori scat- 

 tered, elongated, on both surfaces of the leaves and petioles* 

 spores more or less globose, consisting of several cells surrounded 

 by a common irregular crust. — On leaves and petioles of Violets. 

 August. Common. (Plate IX. figs. 185, 186.) 



Polycystis pompholygodes, Lev. Buttercup Smut; 

 sori varied in form, buUate, epidermis inflated, at first entire, then 

 bursting irregularly, its remains surrounding the clusters ; spores 

 copious, subglobose, black, opaque or pellucid. — On Ranunculus 

 repens and other Uanunculace(B . Summer. Very common. (Plate 

 IX, figs. 183, 184.) 



Polycystis parallela, B. and Br. Bye Smut ; sori "very 

 long, linear, epidermis bursting longitudinally, spores globose, 

 with several projecting nodules, dark brown. — On culms and 

 sheaths of Rye and on the leaves of Carices. (Plate IX. figs. 187, 

 188.) 



TUBURCINIA, Tt, 



Flant deeply seated ; spores multicellular, subglobose, or con- 

 chiform. Berk. Outl., p. 335. 



Tuburcinia scabies, B. ^ Potato Smut ; spores globose, 

 composed of minute cells forming together a hollow globe with 

 one or more lacunae, generally attached laterally by a slender 

 thread, olive. On Potatoes. Common. (Plate III. fig. 54.) 



Tuburcinia Trientalis, B. and Br. Trientalis Smut ; 

 sori two lines broad, buUate, containing a black mass of rather 

 irregular depressed subglobose spores, which are very opaque 

 and distinctly cellular. Hyphasma white, branched, creeping, 

 dehcate. — On leaves of Trientalis Europcea. August and Sep- 

 tember. Scotland. (Plate III. figs. 52, 53.) 



COLEOSPORIUM, Lh, 



Spores cylindrical, septate, some separating at the joints, some 

 of a different nature, persistent. — Berk. Outl.^ p. 333. 



Coleosporium Tussilaginis, Lev. Coltsfoot Rust ; on 

 the under surface, prominent, crowded, generally forming circles, 

 becoming very confluent; spores numerous, subovate, orange- 

 yellow. — On Tussilago Farfara. Summer. Common. (Plate YIII. 

 ngs. 180, 181.) 



Coleosporium pingue, Lev. Tawny Bose Bust ; spots 

 obliterated, sori efPuse, on the nerves and petioles of the leaves ; 

 spores ovoid, yellowish-brown.— On Boses, &c. 



