222 MICROSCOPIC FUNGI. 



or pyriform ; fertile spores subglobose, orange.— On the under 

 surface of "Willow-leaves. Autumn. Common. 



Lecythea Baryi, Berk. De Bart's Rust; sori few; 

 cystidia with an abrupt globose bead; spores subglobose. — On 

 leaves of Br achy podium pennatum. Very rare. 



Lecythea Valerianae, Berk. Valerian Bust; spots 

 yellowish ; sori subrotund, small, confluent, sometimes circi- 

 nating; epidermis at length bursting; spores reddish-biown, sub- 

 globose or clavate, shortly pedicellate. — On Valeriana officinalis. 

 August. 



* * Spores invested. 



Lecythea gyrosa, Berk. Ringed Rust ; spots obliterated; 

 _oii minute, confluent, and forming a small distinct ring ; epi- 

 dermis bursting; spores globose and elongato-pyriform, yellow or 

 pale.— On the upper surface of Raspberry and Bramble leaves, 

 forming a more or less peifeet ring with the centre unoccupied. 

 .September. Uredo spores of Fhragmidium gracile. (Plate V ill. 

 figs. 162-161.) 



R 



* # 



Spores concatenate 



Lecythea Caprseamm, Berk. Sallow Rust; spots 

 obliterated, yeilow on the opposite side ; sori varied in form, here 

 and there confluent, surrounded by the ruptured epidermis ; 

 barren spores subglobose and pyriform, pedicellate; fertile spores 

 subglobose, dirty yellow. — On the under surface of the leaves of 

 Sallows. June to August. Very common. Uredo spores of 

 Melampsora salicina. (Plate V11I. figs. 160, 161.) 



Lecythea Lini, Berk. Flax Rust; spots yellowish; sori 

 subrotund, scattered, surrounded by the ruptured epidermis; 

 spores globose or pyriform, sometimes pedicellate.— On Idnum 

 cathartic urn. July. jSot uncommon. (Plate VIII. Ggs. 165- 

 167.) 



Trichobasis, Lev. 



Spores free, attached at first to a short peduncle, which at 

 length falls away. — Berk. Oidl., p. 332. 



* Spores yellow. 



Trichobasis riibigo-vera, Lev. Round Corx-Rust: 

 spots yellow, heaps oval, scattered, generally on the upper sur- 



