. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. SYNCHYTRIUM. 109. less swollen neighbouring epidermal cells. The sporangia contain reddish-yellow drops of oil, so that the swellings appear yellow. The organs attacked are much distorted and more or less stunted. The same fungus occurs on other Compositae, and is pro- bably identical with S. san- ffuineum of Schroeter, which produces dark red, crusty swell- ings on Cirsium palustre and Orepis biennis. Along with S.
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. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. SYNCHYTRIUM. 109. less swollen neighbouring epidermal cells. The sporangia contain reddish-yellow drops of oil, so that the swellings appear yellow. The organs attacked are much distorted and more or less stunted. The same fungus occurs on other Compositae, and is pro- bably identical with S. san- ffuineum of Schroeter, which produces dark red, crusty swell- ings on Cirsium palustre and Orepis biennis. Along with S. taraxaci one often finds Olpidium simulans. S. fulgens, Schroeter (U. S. America), produces reddish- yellow swellings on the leaves of Oenothera biennis and 0. , . Fio. 25.—Synchytmum taraxaci. Leaves of muneata ; when reSting-SpOreS laraxaami officinale so deformed by the fungus , ., n ^ , that the laminae are all more or less undeveloped. appear they form brown crusts, (v. Tubeuf phot.) The sori of zoosporangia are detached from the host-plant as single sporangia, which become scattered over the leaves. S. trifolii, Pass. ( = Olpidium trifolii, Schroeter), is as yet little known. Other American species are:— S. papillatum, Farl., on Geranium. S. decipiens, Farl., on Amphicarpaea. S. vaccinii, Thomas, ^, on Vaccinium, Gaultheria, Kalmia, Hhododendron, etc. Pycnochytrium. The sori of zoosporangia are not produced directly from the mature sporophore, but the contents of the sporophore pass out by a fine opening and form a thin-walled vesicle, the protoplasm of which breaks up into sporangia. Schroeter divides the genus into two sub-genera. (A) Mesochylrium. The discharge of the original sporophore ^Halsted, " Cranberry gall-fuDgus "; N. 1889. With figiires. Jersey Agric. Coll. Bullet. 64, Dec.. 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