. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. Fii;. 211.—C'hri/somyxa rhododfndi't. Teleuto- spore-sorus which has ruptured the lower epi- dermis of a leaf of Rhododendron hirsutuin. The teleutospores are jjluricellular, and one of them has germinated, giving a promycelium with sterigniata, from which little sporidia are being abjointed. (After De Bary.). Fig. 212.—Ckri/somi/xa rhododtndH on Spruce. The needles are beset with aecidia ; discoloured parts of them a
. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. Fii;. 211.—C'hri/somyxa rhododfndi't. Teleuto- spore-sorus which has ruptured the lower epi- dermis of a leaf of Rhododendron hirsutuin. The teleutospores are jjluricellular, and one of them has germinated, giving a promycelium with sterigniata, from which little sporidia are being abjointed. (After De Bary.). Fig. 212.—Ckri/somi/xa rhododtndH on Spruce. The needles are beset with aecidia ; discoloured parts of them are shown black, the normally green being left white, (v. Tubeuf del.) Chr. abietis (Wallr.).i Xeedle-rust of spruce. Tliis is parasitic on the spruce {Pieca exceha), and is found on the Alps up to an elevation of over 1700 metres. About the beginning of May the hibernating teleutospores produce promycelia and sporidia. The latter germinate at once, and the germ-tubes make their way through the epidermis into young unfolding needles. The mycelium is well-developed and lives inter- cellularly, sending haustoria into the host-cells; it contains yellow oil-drops, so that by the end of June needles contain- ing it exhibit yellow-coloured stripes. For the remainder of the year reddish-yellow elongated teleutospore-cushions are ' Reess, Botan. Zeitiuif/, 1865 ; Die Bostpilzformen d. deut$rhe)i Coniferen, 1S69. Willkomm, Die mikrosropisrheii Feinde dfs Wahles, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Tubeuf, Karl, freiherr von, 1862-1941. London, New York [etc. ] : Longmans, Green & co.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
