. Fig. 183.âPuccinia (/raminis {Aecidium herheridis) on Berberis convmunis. The lowest leaf and two others are seen on the upper surface, and show red spots with light margins, in which the pycnidia are embedded. The other leaves show the under surface with patches of aecidia. (v. Tubeuf del.) to their neighbours to form the peridium. Diseased portions of leaves become considerably thickened. The cells of the single layer of palisade parenchyma are abnormally elongated, and the intercellular spaces of the spongy parenchyma, instead of being large, are small and filled with mycelium. The aecidi
. Fig. 183.âPuccinia (/raminis {Aecidium herheridis) on Berberis convmunis. The lowest leaf and two others are seen on the upper surface, and show red spots with light margins, in which the pycnidia are embedded. The other leaves show the under surface with patches of aecidia. (v. Tubeuf del.) to their neighbours to form the peridium. Diseased portions of leaves become considerably thickened. The cells of the single layer of palisade parenchyma are abnormally elongated, and the intercellular spaces of the spongy parenchyma, instead of being large, are small and filled with mycelium. The aecidio- spores escape in July to germinate on Gramineae. The germ- tube enters the host by the stomata only, and develops into an intercellular mycelium; this in about eight days produces uredospores from cushions or sori which form lines, and break
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
