222 MICROSCOPIC FUNGI. 



or i)yriform ; fertile spores subglobose, orange.— On the under 

 surface of Willow-leaves. Autumn. Common. 



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

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

 leaves of B rachypodium pennatum. Very rare. 



Lecythea Valerianae, Berk. Valerian Bust; spots 

 yellowish ; &ori subrotund, small, confluent, sometimes circi- 

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

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

 August. 



* * Spores invested. 



Lecythea gyrosa, Berk. Kinged Rust ; spots obliterated; 

 sori minnte, 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 perfect ring with the centre unoccupied. 

 ^eptember. Uredo spores of Phragmidium gracile. (Plate VIII, 

 figs. 162-16i.) 



* * * Spores concatenate. 



Lecythea Caprseamm, Berk. Sallow Rust; spots 

 obliterated, \ellow on the opposite side • sori varied in form, here 

 and there confluent, surrounded by tne 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 VIII. figs. 160, 161.) 



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

 subrotuud, scattered, surrounded by the ruptured epidermis ; 

 spores globose or pyriform, sometimes pedicellate.— On Limini 

 catharticum. July. IS'ot uncommon. (Plate Vlll. fi^s. 165- 

 167.) 



Trichobasis, Lev. 



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

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



* Spores yellow. 



Trichobasis rubigo-vera, Lev. Round Corn-Rust: 

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



