EXPLANATION OF PLATES. xiii 



Fig. 38. — Septoria salicicola, Fvies.— a, section of perithecium enlarged ; b, conidia x 



400. 

 39.— Melampsora vitellina, DC. — Uredospoves x 400. 

 40. — Me lampsora 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. — Bhytisma salicinum, Pers. — a, section of stroma ; b, ascus and ascospores ; 



c, ascospores x 400. 

 44 Uncinula adunca, Wallr. — a, perithecium with appendages, enlarged; b, 



ascus with ascospores x 400. 

 45. —Pcstalozzia Hartigii, Tub. — Conidia in various stages x 400. 

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

 47. — Peridermium elatinum, k. & S.--.Ecidiospores x 400. 

 48. — JEcidium pseudo-eolumnure, Kuhn. — a, cluster-cup, enlarged ; b, secidiospore 



x 400. 

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

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



x 400. 

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



400. 

 53. — Caoma Laricis, West. — a, ascidiospores x 400. 

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



PLATES XXII., XXIIL, XXIV. 

 Pests — Field Crops. 



Fig. 1. — Ustilago Tritiei, Jens. — a, spores ; b, spores germinating with conidia x 



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



spores and conidia x 

 3. — Puccinia Gram/mis, Pers. — a, uredospores; b, teleutospores x 

 4. — Puccinia Bubigo-vcra, DC. — a, uredospores ; b, teleutospores ; c, teleuto- 



spore germinating with conidia x 

 5. — Puccinia corona ta, Cord. — a, teleutospores x 

 6. — Fusarium eulmorum, W.G.S. — Mycelium with conidia x 

 7. — Septoria Tritiei, 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 nitda, Jens. — a, spores; b, spores germinating x 

 11. — Fusarium Hordei, W.G.S. — a, grain with its parasite ; b, Lyphae 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; b, spores ; c, spore germi- 

 nating with conidia x «00 

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

 17. — Fusarium heterosporum, Xees. — 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. — Pltyllachora 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 striAformis, West. — a, spores. 



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

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

 26. — Scolecotrichwm sticticum, B. & Br. — a, hyphos ; b, conidia. 

 27. — EpichloV typhma, 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. — Uromyccs I'oce, Eabh. — a, uredospores ; b, teleutospores x 

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

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



• germinating x 

 33. — Fusarium Lini, Poll. — a, conidia x 

 34. — Uromyccs Betce, Kuhn. — a, uredospores; b, teleutospores x 



