. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. CRONARTICM. 383 and curl up. unknown. In some districts very common. Aecidial stage Gymnosporangium.^ Teleutospores bicellular and furnished with stalks which have gelatinous walls, so that the spores come to form part of a gelatinous mass.^ The first-formed teleutospores are thick-. Fig. 21G.—Gymnosporangiuvi clavaiiaeformc. 1, S, 3, Stages in dbvelopment of the spore-cushions. U, 5, 6, Isolated spores (enlarged);
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. CRONARTICM. 383 and curl up. unknown. In some districts very common. Aecidial stage Gymnosporangium.^ Teleutospores bicellular and furnished with stalks which have gelatinous walls, so that the spores come to form part of a gelatinous mass.^ The first-formed teleutospores are thick-. Fig. 21G.—Gymnosporangiuvi clavaiiaeformc. 1, S, 3, Stages in dbvelopment of the spore-cushions. U, 5, 6, Isolated spores (enlarged); 5 is thin-coated, the others are thick-coated. 7, Germinating spore with proniycelium abjointing sporidia (S). d, A germinating sporidium. (After Tubeuf.) walled, the succeeding ones are thin-walled. Uredospores do not occur. The aecidia have a thick peridium. The teleuto- ^v. Tubeuf: (1) Oentralblatt/. Balcter. u. Parasitenkunde, 1891; with a review of the current Literature. (2) " Infeotionen mit ; Forstlich- natunoiss. Zeitschri/t, 1893, p. 75. Woernle, " Anatomisohe Untersuchiingen d. durch Gymnosporangium-Arten hervorgerufenen Missbildungen," idem., 1894. American Literature, see p. 401. gelatinous substance is obviously well-adapted to absorb raln-w^ater and so facilitate germination of the teleutospores in situ; the sporidia pro- duced are then carried off by rain or liberated after the cushions dry 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; Smith, William G. London ; New York [etc. ] : Longmans, Green & co.
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