Xll EXPLANATION OF PLATES. 



Fig. 35. — Glceosporium Mezerei, C. & M. — a, conidia x 400. 

 36. — Phleospora OxyncanthcB, Kze. — a, conidia x 400. 

 Bl.—Podosphcera OxyacanthtB, DC— a, tip of appendage enlarged, 

 38. — Raestelia lacerata, Mcr. a. section of cups, enlarged; b, rccidiospore 



■ 400. 

 39,—Phyllosticta Cytisi, Desm. — a, section of peritheciam ; o, conidia x 400. 

 40. — Rastelia cornuta, Gmel. — a, three cups, enlarged; b, secidiospores x 400. 

 41. — Gymnosporangium Sabhue, Dicks.— Pustule, nat. size; a, teleutospores 



x 400. 

 42. — Gymnosporangium confusum, Plowr. — Teleutospores germinating x 400. 

 43. — Coryneum Berkeleyi, Cooke. — a, section of receptacle ; b, conidia x 400. 

 44. — Gymnosporangium clavariiformc. Jacq. —Pustule, nat. size ; a, teleutospores 



x 400. 

 45. — Gymnosporangium juniperinum, L.— Pustules, nat. size; a, teleutospores 



x 400. 

 46.—SphareUa Taxi, Cooke.— a, perithecium enlarged; b, ascus and sporidia 



x 400. 



PLATES XIX., XX., XXI. 

 Pests — Forest Trees. 



Fig. 1. — Phyllosticta Aceris, Sacc— a, section of perithecium enlarged ; b, conidia 

 x 400. 

 2. — Phleospora Aceris, Lib. — a, section of perithecium ; b, conidia x 400. 

 'd.—Septoglccum Hartigianum, Sacc— a. twig with pustules; b, section of 



pustule ; c, conidia x 400. 

 4. — Botrytis depradans, Cooke. — Portion of capitulum x 400. 

 5. — Bhytisma acerinum. Fries. — a, conidia; b, ascus and ascospores x 400. 

 0. — Uncinula Aceris, DC. — a, receptacle enlarged; b, tip of appendage en- 

 larged ; c, ascus and ascospores x 400. 

 7. — Bhytisma punctatum, Fries. — a, conidia; b, ascus and ascospores x 400. 

 9. — Glaosporium nervisequum, Fckl. — a, conidia x 400. 

 10 — Scptoria Hippocastani, 13. & Br. — a, section of perithecium ; b, sporules x 



400. 

 11. — Stereum purpureum, Fries. — a, basidium with spores x 400. 

 12. — Phleospora Clmi, Fries. — a, section of perithecium; b, sporules x 400. 

 13 — Piggotia asiroidea, Berk. — a, conidia x 400. 

 14. — Phyllachora Ulmi, Fckl. — a, section of stroma ; b, ascus and ascospores x 



400. 

 15. — Seploria Fraxini, Desm. — a, section of perithecium ; b, sporules x 400. 

 16. — Glozosporium umbrincllum, B. & Br. — Hyplne with conidia x 400. 

 17. — Microstoma album, Desm. — Basidia and conidia x 400. 

 1*. - Uredo Quercus, Brond. — a, uredospores x 400. 

 19. — Stereum hirsutum, Fries. — a. basidium with spores x 400. 

 •in. sti ■rcum frustulosum, Fries. — a, basidia with spores x 400. 

 21. — Diaporthe taleola, Sacc. — a, pustules enlarged; b, section of stroma; c, 



conidia ; d, ascus and ascospores x 400. 

 22.— Phytophthora omnimra, Dl'y. 



23. — Glceosporium Carpvni, Desm. — a, pustule enlarged ; b, conidia x 400. 

 •J J.- Gnomoniella flmbriata, A. & B.- ". section ol perithecia enlarged; b, asco- 

 spores x 400. 

 25. Phyllosticta betulina, Sacc. — a, conidia x 400. 

 2i;. Melampaora betulina, Pers. — a, uredospores; b, teleutospores ; c, teleuto- 



spm. - germinating x 400. 

 27. — Dothidella betulina,FrieB. — a, section of stroma enlarged; b, ascospores x 



100. 

 is. Septoria TiUcB,Weit. — a, section of peritheciam enlarged ; &,"oonidia x 400. 



29. Septori >la, Cooke. — a, section of perithecium ; b, conidia x 400. 



30. P ' bacilligera, Pres. — a, hyplnu with conidium ; />. conidia x 400. 

 81. Septoria Populi, Desm. — a, section of perithecium; b, conidia x 400. 

 '■'>i. Marsonia Populi, Lib. — a, section of pustule ; b, conidia x 400. 



83. QlcB08porium Tremula, Lib. — a, section of pustule ; b, conidia x 400. 



84. \Lelamp ora Tremula, Tul. — a, uredospores; b, teleutospores x 400. 



85. Mi amp ora cecidioides, DC. — a, uredospores; b, teleutospores x 400. 

 86.- Melampaora popuUna, Jacq. — a, uredospores ; 6, teleutospores x 400. 

 37.— Taphrvna aurea, Fries. — a, section of blister; b, ascus and spores; c, asco- 



jpore x 400. 



