. Timber and some of its diseases. Timber; Trees. "CANKER": THE LARCH DISEASE. 237 spores; but we may pass over these particulars here, the chief point for the moment being that. Fig 36.—a, vertical section (magnified) through the dead cortex of a larch, infected with the mycelium {d) of Peziza Willkommii (Htg.), ^vhich is developing its fructifications {a and F). The mycelium fills up the gaps in the corte"«c, d^ with a white felt-work, a is a boss-like cushion of this felt-work bursting forth to become a cup-like fructification; -F, the mature Peziza fructification (m sect
. Timber and some of its diseases. Timber; Trees. "CANKER": THE LARCH DISEASE. 237 spores; but we may pass over these particulars here, the chief point for the moment being that. Fig 36.—a, vertical section (magnified) through the dead cortex of a larch, infected with the mycelium {d) of Peziza Willkommii (Htg.), ^vhich is developing its fructifications {a and F). The mycelium fills up the gaps in the corte"«c, d^ with a white felt-work, a is a boss-like cushion of this felt-work bursting forth to become a cup-like fructification; -F, the mature Peziza fructification (m section); r, its stalk ; r, the margins of the cup^; h, the layer of spore-sacs (awra). B, four of the asci from \ very highly magnified, a^ hair-like barren filaments between the saci; <;, a fully-developed ascus, containing the eight spores ; d^ an ascus emptied of spores (they have escaped through the hole at the apex); b^ a young ascus in which the spores are not yet formed: to the left below is a small one stiU younger. (After Hartig and Willkomm.) very large numbers of the minute spores are formed, and .scattered by the wind, rain, animals, &c. More-. 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 Ward, H. Marshall (Harry Marshall), 1854-1906. London, Macmillan
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Keywords: ., bo, bookcentury1900, bookdecade1900, bookpublisherlondonmacmillan
