. Manual of tree diseases . Trees. 308 MANUAL OF TREE DISEASES bark are invaded by the mycelium and the living tissues are killed. Fruiting-bodies of two kinds are formed by the causal fungus. They are sometimes considered as two separate species. One form is distinctly hoof-shaped with a jet-black and ex- tremely checked, charcoal-like upper surface (type of Forms igniarius, Fig. 59), while the other is more shelf-like, with the gray to black upper surface marked with concentric arched. Fig. 60. — Fruiting-body of Fames igniarius. This form is sometimes called Ftymes nigricans. ridges and is
. Manual of tree diseases . Trees. 308 MANUAL OF TREE DISEASES bark are invaded by the mycelium and the living tissues are killed. Fruiting-bodies of two kinds are formed by the causal fungus. They are sometimes considered as two separate species. One form is distinctly hoof-shaped with a jet-black and ex- tremely checked, charcoal-like upper surface (type of Forms igniarius, Fig. 59), while the other is more shelf-like, with the gray to black upper surface marked with concentric arched. Fig. 60. — Fruiting-body of Fames igniarius. This form is sometimes called Ftymes nigricans. ridges and is slightly checked (type of Forties nigricans, Fig. 60). The under surfaces of both types of fruiting-bodies are identical, being reddish brown and velvety. The open ends of the spore-bearing tubes show as minute circular open- ings, barely visible to the unaided eye. The fruiting-bodies form at branch stubs which have not healed over. A new layer of tubes is added each year and large fruiting-bodies of this fungus have been found which showed eighty layers of tubes. When the fruiting-body is broken, the layer of tubes is seen to be stuffed with white material (Fig. 61).. 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 Rankin, W. Howard (William Howard), b. 1888. New York : The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1918
