LIST OF ILLUSTRATIONS. 



WILSON'S variety of Claviceps on Ergot. 



FIG. PAGE 



107. Claviceps purpurea, Tul., var. Wilsoni, W.Sm. 



Natural size 234 



108. Claviceps purpurea, Tul., var. Wilsoni, "W.Sm., x5 234 



109. Capitulum of Claviceps purpurea, Tul. , var. Wilsoni, 



W.Sm., x20 235 



110. Conceptacle of Claviceps purpurea, Tul. , var. Wilsoni, 



W.Sm., x200 236 



111. ASCIIS and sporidium of Claviceps purpurea, Tul., 



var. Wilsoni, W.Sm., x 500 and 1000 . . 237 



MILDEW OF PARSNIPS. 



112. Peronospora nivea, Ung., and oospores, x 400 ; con- 



idia and oospores, x 1000 ..... 240 



113. Protomyces macrosporus, Ung. , x 400 . . . 242 



BUNT OF WHEAT. Tilletia Caries, Tul. 



114. Grains of wheat, with Tilletia Caries, Tul., x5 .246 



115. Spores of Tilletia Caries, Tul., x 400 . . . 247 



116. Germination of Tilletia Caries, Tul., x 1000 . . 248 



SMUT OF CORN. Ustilago carlo, Tul. 



117. Panicle of oats, attacked by Smut. Natural size . 255 



118. Section through a spikelet of oats slightly affected 



with Smut, x 5 256 



119. Fragment of glume of oats, showing the epidermis 



burst by the Ustilago within, x 25 . . . 257 



120. Spores of Ustilago carlo, Tul., x 400 . . . 258 



121. Spores in various stages of germination, x 1000 . 259 



TARE OR VETCH AND PEA MOULD. 



122. Peronospora vicice, Berk, and oospore, x 400 ; coni- 



dium, xlOOO 264 



PEA MILDEW. 



123. Erysiphe Martii, Lk., conceptacle, x 100 . . 266 



124. Erysiphe Martii, Lk., ascus with sporidia, x 500 . 267 



MILDEW OF LETTUCES. 



125. Peronospora ganglioniformis, Berk., x 400 ; coni- 



dium, xlOOO 270 



