. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. 226 DIVISION II.—COURSE OF DEVELOPMENT OF FUNGI. The course of development in Eurotium and Penioilliimi may be described in the same words as in Erysiphe, making allowance for differences of form and for the circumstance that the species in the two last genera are not epiphytic parasites, but (for the most part) inhabit dead organic bodies; here too we find frequent absence of sporocarps where the vegetative conditions are not altogether favourable. The gonidiophores
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. 226 DIVISION II.—COURSE OF DEVELOPMENT OF FUNGI. The course of development in Eurotium and Penioilliimi may be described in the same words as in Erysiphe, making allowance for differences of form and for the circumstance that the species in the two last genera are not epiphytic parasites, but (for the most part) inhabit dead organic bodies; here too we find frequent absence of sporocarps where the vegetative conditions are not altogether favourable. The gonidiophores of Eurotium (Figs. 94 and 35 6) are erect usually unicellular hyphal branches inflated and bladder-like at the apex, where closely crowded radiating sterigmata of uniform height are developed, and from these sterigmata spores are serially and successively abjointed. The gonidiophores in. Penicillium (Fig. 36) are narrowly filiform, septate, and cymosely branched, and at their extremities, which are erect parallel and close to one another and terminate at nearly the same height, spores are formed by serial successive abjunction. Thegporocarps of Penicillium glaucum have at present been found only in dark or impenectly lighted places where the supply - of oxygen is small, and chiefly on bread (Brefeld) ; I myself found them in abundance on a heap of grape-skins, both growing naturally and after the spores had been sown by Fig. 107. I, II Podosphaera pannosa. / chain of gonidia on the gonidiophore and mycelium. //ripe sporocarp; theascuso is emerging through the wall ofthe sporocarp A which has been rupturedby pressure. ///—VPodolpheura Cas- tagnei. Ill archicarp c with antheridial branch f on the mycelium. IV older stale; c archicarp invested by the hyphal branches of the wall,/ antheridial branch. A'still older state in optical longitudinal section; a ascus with its pedicel. ceU, the product off-, A the wall /,//after Tulasne. Magn. £00 times. The course of developme
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