. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. COLEOSPORIUM. 375 The aecidia are produced amongst the pycnidia on needles two or three years old; they have long white peridia and are known as Peridermiuvi dblongisporium Fuck. The. aecidio- spores are yellow when mature, and originate in chains, which in the earlier stages of development consist of intermediate cells and spores, but the former gradually disappear (Fig 208). The spores have an average length of 30
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. COLEOSPORIUM. 375 The aecidia are produced amongst the pycnidia on needles two or three years old; they have long white peridia and are known as Peridermiuvi dblongisporium Fuck. The. aecidio- spores are yellow when mature, and originate in chains, which in the earlier stages of development consist of intermediate cells and spores, but the former gradually disappear (Fig 208). The spores have an average length of 30-5/« and breadth of. Fig. 20S.—Po'idi'.vmmni pinl (ColeoR'poruitii senecionis). Portion of an aecidium with basidia (6) giving off spores and intermediate cells (d); outside the peridium (p) other basidia (e) with club-shaped ends force up the epidermis; iL, the thick mycelium in the leaf-parenchyma. (After R. Hartig.) 20m; iu form they are generally longish-oval, few being round; the spore-coat is moderately thick. Aecidiospores are capable of immediate germination, and produce Uredo-' on Senecio by June. The uredospores have an average length of 28'5/u, and breadth 15"5/u; they are generally oblong, with a moderately thick coat beset with spiny 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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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
