Winter, G. Ustilagineen, in Flora. 1876. in Rabenhorst's Kryptogamen Flora von Deutschland, Oesterreich, und der Schweiz. 2nd edit. 1884. Withering, W. Botanical Arrangement. 2nd edit., 1787, and 4th edit. Beitrag zur Kenntniss der Ustilagineen, in Botanische Zeitung. 1873. Æcidium pini und sein Zusammenhang mit Coleosporium senecionis. Woronin, M. Beitrag zur Kenntniss der Ustilagineen. 1882. Young, A. Annals of Agriculture, vol. xliii. 1805. EXSICCATI. Baxter, W. Stirpes Cryptogamicæ Oxoniensis. Oxford: 1825. Berkeley, M. J. British Fungi. 4 vols. 4to. London. Cooke, M. C. Fungi Britannici Exsiccati. Ist series, i-vi. Svo. London: 1865-71. 2nd series, i-vii. 4to. London: 1875-79. Rabenhorst, L. Fungi Europæi Exsiccati. 4to. Dresden: 1861-85. Thümen, F. Mycotheca Universalis. 23 cent. Bayreuth: 1875-80. Micro Fungi Britannici. 2 cent. 5 cent. Forden. DESCRIPTION OF PLATES. PLATE I. Fig. 1.-Mycelium of the acidiospores of Puccinia porri on Allium schenoprasum near the spore-bed, showing the granular protoplasm and nuclei. X 500. C. B. P. Fig. 2.-Mycelium of the acidiospores of Puccinia tragopogonis. C. B. P. X 500. Fig. 3.—Three spermogonia of Æcidium berberidis in different stages of development, the two younger show the converging fibres which form their necks. These subsequently separate and become paraphyses. X 200. Modified from De Bary. Fig. 4. Two spermogonia in a more advanced condition, seen in section. De Bary. X 200. Fig. 5.-Spermatia being abstricted from their hyphæ. X 200. De Bary. Fig. 6.-Three spermatia of Ecidium berberidis. × 475, and enlarged to 1000. C. B. P. Fig. 7.-Five spermatia of Æcidium ranunculi repentis, April 29, 1883, showing their different forms and somewhat irregular contour in the same spermogonium. X 475, enlarged to 1000. C. B. P. Fig. 8.-Three of the same spermatia after being twelve hours in sugar and water; they are just beginning to bud. Enlarged to 1000. C. B. P. Fig. 9.-The same after forty-eight hours. Enlarged to 1000. C. B. P. Fig. 10.- Spermatia of the acidiospores of Puccinia adoxa from Mr. A. Lister's figure. × 710, enlarged to 1000. Fig. 11. Two spermatia of Ecidium punctatum in the act of budding, May 7, 1883. Enlarged to 1000. C. B. P. Fig. 12. Spermatia of Æcidium bellidis, December, 1883. Enlarged to 1000. C. B. P. Figs. 13-15.-The same germinating in honey and water, after twelve hours. Enlarged to 1000. C. B. P. Fig. 16.—The same as they appeared on the sixth day. Enlarged to 1000. C. B. P. PLATE II. Fig. 1.—The early stage of Æcidium crassum, showing the basipetal spore series enclosed by the pseudoperidial cells, and covered by the epidermis. X 200. De Bary. Fig. 2.—Ecidium grossulariæ at maturity, after rupture of the epidermis and pseudoperidial cell-layer. × 150. De Bary. Fig. 3.-Four æcidiospores of Puccinia poarum (Æcidium tussilaginis). × 475. C. B. P. Fig. 4.—One of the same beginning to germinate and showing its germpores, five of which are visible, the sixth being on the opposite side of the spore. × 475. C. B. P. Fig. 5 -Æcidiospore of Phragmidium rubi in the same condition, and showing five germ-pores. X 475. C. B. P. Fig. 6.-Æcidiospore of Puccinia poarum twelve hours after germination, showing the circumnutation of the germ-tube, and the migration of the endochrome to its growing end. × 475. C. B. P. Fig. 7.-Æcidiospore of Gymnosporangium clavariæforme (Ræstelia lacerata), with six germ-pores, from one of which a comparatively short germ-tube has been protruded, which has become branched and full of endochrome from the spore, at its peripheral extremity. x 475. C. B. P. Fig. 8.-A basipetal series of acidiospores of Chrysomyxa rhododendri showing the alternate abortive cells. × 600. De Bary. Fig 9.-Ecidiospore-chain of Rastelia cancellata, showing the undeveloped mother-cells between the spores. X 300. De Bary. Fig. 10.-Ecidiospores of Puccinia poarum (Æcidium tussilaginis) germinating upon the cuticle of Poa trivialis, and entering the stomata. C. B. P. × 475. Fig. 11.-Part of a leaf of Vinca major, with the spermogonia and æcidia of Puccinia vincæ. X 2. C. B. P. Fig. 12.-Section of the same leaf, showing two of the pulvinate æcidia. X IO. C. B. P. Fig. 13.-Section of a small æcidium. Fig. 14.-Two acidiospores germinating. × 475. C. B. P. X 500. C. B. P. PLATE III. Fig. 1.-Sorus of the uredospores of Melampsora farinosa, showing the paraphyses. X 200. De Bary. Figs. 2-4.-Uredospores of the same in different stages of development. X 300. De Bary. Fig. 5.-Uredospores and mycelium of Puccinia suaveolens treated with caustic potash, showing the development of the spores. × 300. De Bary. Figs. 6-8.-Development of the teleutospores of Uromyces fabæ. De Bary. Fig. 9.-Uredospore of Puccinia graminis. X 475. C. B. P. × 300. Fig. 10.-Two uredospores of the same in the initial stage of germination, showing two germ-pores. × 475. C. B. P. Fig. 11.-Uredospore of the same after five hours and forty minutes' immersion in water; it has emitted a germ-tube from each germ-pore. C. B. P. × 475. Fig. 12. The same after twenty-three hours. One germ-tube has ceased to grow and is, like the spore, empty; the other, which is empty and septate below, contains all the orange endochrome, and, having grown to a considerable length, has taken three circumnutatory turns. X 475. C. B. P. Fig. 13. Another uredospore of the same, which, after twenty-six hours, has become branched as well as having made several circumnutatory movements. X 475. C. B. P. Fig. 14.-Abnormal germination of one of the same uredospores (after ninety hours), in which a spore of reserve has been produced at the upper end of the germ-tube. X 475. C. B. P. Fig. 15. The germ-tubes of two uredospores of Puccinia graminis entering the stomata of a wheat plant. × 475. C. B. P. Fig. 16.-Two hyaline paraphyses of the uredospores of Melampsora epitea. X 200. C. B. P. Fig. 17.--Two capitate hyaline paraphyses of the uredospores of Puccinia anthoxanthi. X 200. C. B. P. Figs. 18-21.-Development of a teleutospore of Puccinia graminis. × 200. De Bary. Fig. 22. Teleutospore of Gymnosporangium clavariaforme germinating. It has protruded two promycelia, one from each segment near the septum. The endochrome is passing from the spore into the promycelia, leaving the apex of the spores empty. × 475. C. B. P. Fig. 23. The same further advanced. X 475 C. B. P. Fig. 24. Four promycelial spores of the same, three of which have germinated, and one has formed a spore of reserve. × 475. C. B. P. PLATE IV. Fig. 1.-Promycelial spores of Puccinia phalaridis piercing by their germtubes the epidermal cells of Arum maculatum. × 475. C. B. P. Fig. 2.—Teleutospore of Uromyces fabæ germinating. × 200. C. B. P. Fig. 3.-Teleutospore of Puccinia coronata germinating from both cells; both germ-canals are placed laterally. X 250. C. B. P. Fig. 4. Teleutospore of Puccinia arundinacea germinating. C. B. P. X 250. Fig. 5.-Teleutospore of Phragmidium rubi, three cells of which have germinated. X 300. C. B. P. Fig. 6.-Teleutospore of Triphragmium ulmaria germinating. × 475C. B. P. Fig. 7.-Teleutospore of Endophyllum euphorbia germinating; two of the promycelial spores have already emitted germ-tubes while still attached to the promycelium. X 475. C. B. P. Fig. 8. Three teleutospores of Melampsora betulina, two of which have germinated and are emptied of their endochrome. × 475. C. B. P. Fig. 9.-Three teleutospores of Coleosporium senecionis, the upper compartments of two of which have germinated and produced single promycelial X 300. C. B. P. spores. Fig. 10.-Germination of Chrysomyxa rhododendri. After De Bary. Fig. 11.-Gymnosporangium sabinæ, thin-walled teleutospore germinating (12 hours); two germ-tubes have been emitted from each segment of the spore. X 200. C. B. P. |