EXPLANATION OF PLATES. xiii 



FIG. 38. Septoria salicicola, Fries. a, section of perithecium enlarged ; b, conidia x 



400. 



39. Melampsora vitellina, DC. Uredospoves x 400. 

 0. Melampsora mixta, Thiim. Uredospores x 400. 

 41. Melampsora epitea, Kunze. a, uredospores ; b, teleutospores x 400. 

 42. Melampsora farinosa, Pers. a, uredospores ; b, teleutospores x 400. 

 43. Rhytisma saiicinum, Pers. a, section of stroma ; b, ascus and ascospores ; 



c, ascospores x 400. 

 44 Uncimila adunca, Wallr. a, perithecium with appendages, enlarged; 5, 



ascus with ascospores x 400. 



45. Pestalozzia Hartigii, Tub. Conidia in various stages x 400. 

 46. Peridermium Pini, Wallr. a, cluster-cup, enlarged ; b, ascidiospores x 400. 

 47. Peridermium elatinum, A. & S. ^cidiospores x 400. 

 48. JEcidiitmpseudo-columnare, Kuhn. a, cluster-cup, enlarged ; b, eecidiospore 



x 400. 



50. Cceoma pinitorquum, Br. a, secidiospores x 400. 

 51. Nectria cucurbitula, Fries. a, cluster of perithecia, enlarged ; b, ascospores 



x 400. 

 52. Lophodermium Pinastri, Chev. a, perithecium enlarged ; b, ascospore x 



400. 



53. Ccnoma Laricis, West. a, secidiospores x 400. 

 54. Dasyscypha calycina, Fckl. b, cup ; c, section ; d, ascospores x 400. 



PLATES XXII., XXIIL, XXIV. 



PESTS FIELD CHOPS. 



FIG. 1. Ustilago Tritici, Jens. a, spores; b, spores germinating with conidia x 



2. Tilletia Tritici, Wint. a, spores ; b, spores germinating with secondary 



spores and conidia x 



3. Puccinia Graminis, Pers. a, uredospores ; b, teleutospores x 

 4. Puccinia Rubigo-vera, DC. a, uredospores ; b, teleutospores ; c, teleuto- 



spore germinating with conidia x 

 5. Puccinia coronata, Cord. a, teleutospores x 

 6. Fusarium culmorum, W.G.S. Mycelium with conidia x 

 7. Septoria Tritici, Desm. a, section of perithecium enlarged; b, conidia x 

 8. Septoria Graminum, Desm a, section of perithecium enlarged ; b, conidia x 

 9. Ustilago Hordei, Kell. a, spore; b, spores germinating x 

 10. Ustilago nuda, Jens. a, spores ; 6, spores germinating x 

 11. Fusarium Hordei, W.G.S. a, grain with its parasite ; b, Lyphss with 



conidia x 



12. Ustilago Avence, Jens. a, spores ; b, spores germinating x 

 13. Urocystis occulta, Wallr. a, cluster of spores. 

 14. Claviceps purpurea, Tul. a, ergot of rye in situ ; b, ergot x 2 ; c, ergot with 



claviceps x 3 ; d, ascus with sporidia x 



15. Ustilago Maydis,~DC. a, swollen receptacles; 6, spores ; c, spore germi- 

 nating with conidia x 800 



16. Ustilago Reiliana, Kuhn. a, spores ; b, spore germinating x 1000 

 17. Fusarium Jieterosporum, Nees. a, conidia x 



18. Erysiphe Graminis, DC. a, receptacle x 40 ; b, ascus and sporidia x 

 19. Oidium monilioides, Link. a, chain of conidia ; b, conidia x 

 20. Phyllachora Graminis, Pers. a, pustule enlarged ; b, ascus and sporidia x 

 21. Claviceps Wilsoni, Cooke. a, clubs, nat. size ; b, club x 5 ; c, perithecia x 



20 ; d, sporidium x 



22. Ustilago hypodytis, DC. a, spores x 

 23. Tilletia striiformis, West. a, spores. 



24. Isaria fuciformis, Berk. a, stroma enlarged ; b, conidia x 

 25. Fusarium insidiosum, Berk. a, tufts enlarged ; b, conidia x 

 26. Scolecotrichiim sticticum, B. & Br. a, hyphee ; b, conidia. 

 27. Epichloe' typhina, Pers. a, section of stroma enlarged ; b, sporidium x 

 28. Ustilago grandis, Fries. a, spores. 



29. Puccinia Phragmitis, Schum. a, uredospores ; b, teleutospores x 

 30. Uromyces Poce, Kabh. a, uredospores ; b, teleutospores x 

 31. Phyllosticta Cannabis, Kirch. a, section of perithecium ; b, conidia x 

 32. Melampsora Lini, DC. a, uredospores ; b, teleutospores ; c, teleutospore 



germinating x 



33. Fusarium Lini, Boll. a, conidia x 

 34. Uromyces Beta, Kuhn. a, uredospores ; b, teleutospores x 



