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JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



heads in size, thickly cover the green leaves, over entire branches, so as 

 speedily to complete the work of destruction. The receptacles are nearly 

 globose, immersed in the leaves, and enclose a gelatinous nucleus, which 

 consists of a mass of cylindrical tubes or asci, each containing eight 

 sporidia. These sporidia are elliptical, colourless (18-20 x 5-6 /<)> and 

 divided by a transverse septum into two cells. Asci (70-75 x 12 14 fx) 

 without paraphyses. 



This is so deep-seated an endophyte that it is doubtful whether the 

 application of fungicides would make any impression. We can only 

 advise the removal of all affected twigs, as soon as discovered, and burning 

 them. 



Sacc. Syll i. 1836 ; Grevillea, vi. 128. 



EXPLANATION OF PLATES XVI., XVII., XVIII. 



FlG. 1. — Exobasidium rhododendri, Cnun.— a, cluster of galls; b, basidium with 

 spores x 350. 



2. — Phyllosticta arbuti, Desm. — a, section of perithecia ; b, conidia x 400. 



3. — Scptoria unedonis, Rob. — a, section of peritheciuni ; b, conidia x 400. 



4. — Phyllosticta Cookei, Sacc. — a, section of peritheciuni ; 6, conidia x 400. 



5. — Capnodium Footii, Harv. — Perithecia with mycelium and sporules x 400. 



6. — Phyllosticta tinea, Sacc. — a, section of perithecia ; b, conidia x 400. 



7. — Phyllosticta ligustri, Sacc— a, section of perithecia ; 6, conidia x 400. 



8. - -Phyllosticta Umbalis, Pers.— a, section of peritheciuni ; b, conidia x 100. 



9. — Puccinia bti.n, DC. — a, teleutospore x 400. 



10. —Phyllosticta hcdcricola, D. & M. — a, section of peritheciuni ; b, conidia x 400. 



11. — Scptoria insularis, B. & Br.— a, section of peritheciuni ; b, conidia x 400. 



12. — Scptoria licderw, Desm.— a, section of perithecia ; b, conidia x 400. 



13. — Gla'osjxirimn paradoxum, De Not.- a, section of pustule; 6, conidia x 400. 



14. — Phyllosticta nuptialis, Thiim. — a, section of perithecium ; b, conidia x 400. 



15. — Phyllosticta phillyre<e, Sacc. — a, section of perithecium ; 6, conidia x 400. 

 10. — U redo phillyrea, Cooke. — a, pustule enlarged; b, uredospore x 400. 



17. — Phyllosticta sanguined, Desm. — a, section of peritheciuni ; b, conidia x 400. 



18. — Phyllosticta ruscicola, D. A M. — a, section of perithecium ; b, conidia x 400. 



19. — Phyllosticta mahonue, S. & S. — a, section of perithecium; b, conidia x 400. 



20. — Ovularia berbcridis, Cooke.- -a, hyphae with conidia x 400. 



21. — Glccosporium berbcridis, Cooke. — a, section of pustule ; b, conidia x 400. 



22. — Microspha-ra berbcridis, DC. — a, tip of appendage; 6, ascus and sporidia x 



400. 



23. — JEcidium berbcridis, Gmel. — a, cluster-cups, enlarged ; 6, eecidiospores x 



400. 



24. — JEcidiiun crassum, Pers. — a, section of cluster-cups, enlarged ; b, aecidio- 



spores x 400. 



25. — Microsphcera divaricata, Wallr. — a, tip of appendage, enlarged ; b, ascus and 



sporidia x 400. 



26. — Microsphcera Hedwigii, Lev. — a, tip of appendage, enlarged ; b, ascus and 



sporidia x 400. 



27. — Cceoma euonymi, Gmel.— a, uredospores x 400. 



28. — Microsphcera euonymi, DC. — a, tip of appendage, enlarged ; b, a^cus and 



sporidia x 400. 



29. — Phyllosticta cornicola, DC. — a, conidia x 400. 



30. — Septoria cornicola, Desm. — a, section of perithecium ; b, conidia x 400. 



31. — Erysiphe tort/His, Wallr.— Receptacle with appendages ; a, ascus and sporidia 



x 400. 



32. — Ovularia syringes, Berk. — Tuft of hypha? bearing conidia x 400. 



33. — Microsphcera lycii, Lasch. — a, tip of appendage ; b, ascus and sporidia x 



400. 



34. — Fusidium deutzice, Cooke. — a, tuft of conidia ; b, conidia x 400. 



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



36. — Phlceospora oxyacanthec, Kze. — a, conidia x 400. 



37. — Podosphcera oxyacanthce, DC. — a, tip of appendage enlarged, 



38. — Rcestelia lacerata, Mer. — a, section of cups, enlarged ; b, aecidiospore x 400. 



39. — Phyllosticta cytisi, Desm. — a, section of perithecium ; b, conidia x 400. 



40. — Pa-stelia cornuta, Gmel. — a, three cups, enlarged; 6, aecidiospores x 400. 



