APPENDIX. 241 



Ebysiphe, Hedw. 



Mycelium arachnoid ; appendages floccosp, simple or irregularly 

 branched, — Berk. Outt., p. 401'. 



* Sporangia i-spored. 



Erysiphe Iiinkii, Lev. Mu&wora Blight ; am<phigenous ; 

 mycelium web-like, fugacious or persistent; couoepladea minute, 

 globose, scattered, emersed ; appendages white, interwoven with 

 the mycelium ; sporangia 8-20, pyriform, with elongated pedicels. 

 — On leaves of Mugwort. Autumn. Frequent. (Plate XII. 

 flgs. 248, 249.) 



** Sporangia S-S-spored. 



Erysiphe lamproearpa, Liv. Composite Bli3ht ; am- 

 phigenous ; mycelium web-like, iugacious or persistent ; con- 

 ceptacles minute, globose, scattered, or gregarious ; appendages 

 coloured, interwoven with the mycelium ; sporangia 8-16, shortly 

 pedicellate ; spores 4-8. — On leaves of Salsify, Scorzonera, 

 Plantain, &c. Autumn. Not uncommon. (Plate XU. figs. 

 250, 251.) I have found but one or two sporangia. 



Erysiphe graminis, D.C. Grass Blight ; amphigenous 

 or epiphyllous ; mycelium eifuse, flocoose, persistent ; conceptacles 

 large, gregarious or disseminated, hemispherical, at length de- 

 pressed and semi-immersed ; appendages simple or interwoven 

 with the mycelium ; sporangia 20-24, ovate,pedioellate, with 

 8 spores. — On leaves of Grasses. Autumn. Frequent. (Plate 

 XLfigs. 235, 236.) 



Erysiphe Martii, Lk. Pea Blight ; amphigenous ; my 

 celium wen-like, very often evanescent, globose ; appendages short, 

 interwoven with the mycelium ; sporangia 4-8, globose, pedicel' 

 late, with 4-8 spores. — On leaves of Pease, Beans, Umbellifero', 

 and other plants. Autumn. Very common. (Plate XL figs, 

 237-239.) 



Erysiphe Montagnei, Lev. Burdock Blight ; amphi- 

 genous or hypophyllous ; mycelium web-like, evanescent ; con 

 ceptacles minute, globose, gregarious or scattered ; appendages 

 distinct from the mycelium ; sporangia 8, ovate, rostrate, with 

 2-3 spores. — On leaves of Burdock. Not uncommon. 



Erysiphe horridula, L^v. Borage Blight; amphigenous; 

 mycelium web-like, sometimes persistent ; conceptacles minute, 

 globose, scattered or clustered ; sporangia 20-24, oblong-ovate, 

 attenuated downwards, containing 3-4 spores ; appMidagcs short, 



£ 



