PLATE 20.— Fungi. 



Figure 



1 . Vertical section of a leaf of black currant, infested with ^cidium Grossularice. 



sj)y spermagonia ; p, perithecia. 



2. Sterigmata (st) and spermatia (sp) from the spermagonia of j^Ecidiwn Euphorbioi. 



3. Ditto, from Mcidium Berberidis. 



4. Vertical section of a spermagonium oi ^cidium Berberidis. 



5. Botrytis infestans, yomig plants growing out from the stomate of a potato. 



6. Full-grown plants of the same. 6 a, spore of ditto. 



7. Torula ?, growing in urine (not diabetic). 



8. Grape fungus, conidial form (Oidium Titc/ceri) as commonly found on the leaves 



and fruits. 



9-11. Conidia of the same, germinating. 



12. Sporiferous form {Circinoboliis) . 



13. Spores from the same. 



14. Hop-mildew, Erysyphe {Sphcerothecd) Castagnei. a, Oidial form ; b, 5, form 



resembling Circinobolus ; e, d, Erysyphal form ; e, spores. 



15. Fragment from the summit of a fertile filament oi Penicillium glaucum. . 



16. Spores of ditto, a, two still united ; b, one detached. 



17. Section of a conceptacle of Cenangium Fraxini, containing st, stylospores, and s, 



spermatia. 



18. Ergot of rye, Cordyceps purpurea, Tulasne ; fruits sprouting from the ergot. 



19. Vertical section of the head of one of the fruits bearing conceptacles in its 



periphery. 



20. Vertical section of a conceptacle containing asci. 



21. Asci removed from the same. 



22. Spores from the interior of the asci. , 



23. Yeast fungus {Torula Cerevisiai), large form at the bottom of liquid. 



24. Ditto, minute form, appearing as a white mealy substance on the surface of stale 



beer. 



25. Sphceria inquinans («) with StilbosjJora macrosperma (6) in the bark of an elm- 



tree. 



26. A portion of the common matrix separating the two, with the stylospores of 



Stilbospora (b) above, and the asci of Sphceria {a) below. 



27. Spore oi Stilbospora macrosperma. 



28. S^ore of SphfEria i?iquinans. 



