CHAPTER III. 



Fungi found on the leaves and chafF-scales of wheat — Uredo— 

 Derivation of the term — Two kinds attacking wheat in all 

 stages of growth, and called red-rust, red-robin, etc. — Uredines 

 belong to Order iii. (Conioraycetes) — Microscopic examination 

 of red-robin — Disappears under the influence of sunshine — 

 Curious botanical question as to its relation to puccinia — 

 Value of such inquiries to practical men — Rust more dreaded 

 on the continent than puccinia — Not so in this country ; but 

 still injurious in late stages of the growth of the plant — 

 Remarks on three other fungi— The last very destructive, but 

 not yet found in Great Britain — Uredo segetum; its common 

 names, smut, etc. — Attacks the flower and its organs — Sin- 

 gular prejudice in its favour— Investigation of Mr. Bauer — 

 Microscopic appearance of spores— These spores found not to 

 be diseased cells, but true fungi— Effect of substances, by 

 which they are nourished, on the forms of fungoid matters — 

 Mode of action of uredo segetum — Excessive smallness of 

 the sporules— Their probable mode of entering the plant — 

 Difiiculties of this point, and remedies, reserved for chapter iv. 



In pursuance of the plan announced in the 

 first chapter, attention will be next directed to 

 the fungi found on the leaves and chaff-scales 

 of the wheat-plant. They are different in 

 appearance from puccinia, but one of them 

 sometimes affords reason to suspect that it is 

 in nearer alliance with it, than has hitherto 



