APPENDIX. 219 



Uncinula adunca, Ley. Willow Blight; mycelium 

 variable ; conceptaeles scattered or frregarious, minute ; appendages 

 simple ; sporangia 8 — 12, sub-pyriform, containing 4 spores. — On 

 the leaves of Willows, Poplars, Birch, &c. Not uncommon. 

 (Plate XI. figs. 221—224.) 



Uncinula bicornis, Lev. Maple Blight ; amphigenous ; 

 mycelium web-like, effuse, evanescent, or like a membrane and per- 

 sistent ; conceptaeles large, hemispherical, at length depressed ; 

 appendages simple, bifid or dichotomous, uncinate ; sporangia 8, 

 sub-pyriform, containing 8 spores. — On the leaves of Maples. 

 Common. (Plate XL figs. 225—228.) 



MiCROSPHiERIA, Lev. 



Mycelium arachnoid ; appendages straight, dichotomous ; branch- 

 lets swelling at the tip, or filiform. — Berk. Outl., p. 404. 



MicrosphseriaHedwigii, Lev. Mealy Guelder-rose 

 Blight ; hypophyllous ; mycelium web-like, evanescent ; concep- 

 taeles i minute, globose, scattered; appendages few, very little 

 longer than the diameter of the conceptaeles ; sporangia 4, ovate, 

 containing 4 spores. — On leaves of mealy Guelder-rose. ^ Near 

 Greenhithe, Kent. 



Microsphseria peniciUata, Lev. Guelder-rose 

 Blight ; amphigenous ; mycelium web-like, effuse, evanescent ; 

 conceptaeles scattered, minute, globose ; appendages 8 — 12, equal 

 to the diameter of the conceptacle ; sporangia 4, ovate, rostrate, 

 containing 8 spores. — On leaves of Guelder-rose and Alder. Pro- 

 bably not uncommon. (Plate XI. fig. 234.) 



Microsphseria Mougeotii, Lev. Tea-tree Blight; 

 amphigenous ; mycelium web-like, oftentimes persistent • con- 

 ceptaeles minute, scattered or gregarious, globose, at length 

 depressed ; appendages loosely dichotomous ; sporangia 12—16, on 

 a short pedicel, 2-spored. — On leaves of Lycium barbarum. 

 Near Dartford, Kent. October, 1864. 



Microsphseria Berberidis, Lev. Berberry Blight; 

 amphigenous ; mycelium web-like, oftentimes persistent ; con- 

 ceptaeles scattered or gregarious, globose, minute ; appendages 

 few (5 — 10) ; branchlets long, divaricate, obtuse at their apices ; 

 sporangia 6, ovate, containing 6 — 8 spores. — On leaves of the 

 common Berberry. Autumn. Prequent. (Plate XI. figs. 229 — 

 232.) 



