. Manual of tree diseases . Trees. BEECH DISEASES 109 plants. The beech-drop is confined to America and is found throughout the range of the beech. The plants grow abun- dantly under beech trees in the woods but it is doubtful whether much appreciable damage is done to the tree. In this respect they may be compared with the mycorhizas of tree-roots (see page 82). The beech- drop plant is much branched, leafless, purplish-brown and stands from four to twelve inches high. Small purplish flowers are borne on the stems in racemes. In the soil the stem ends in a white bulb- like or elongate rhizome
. Manual of tree diseases . Trees. BEECH DISEASES 109 plants. The beech-drop is confined to America and is found throughout the range of the beech. The plants grow abun- dantly under beech trees in the woods but it is doubtful whether much appreciable damage is done to the tree. In this respect they may be compared with the mycorhizas of tree-roots (see page 82). The beech- drop plant is much branched, leafless, purplish-brown and stands from four to twelve inches high. Small purplish flowers are borne on the stems in racemes. In the soil the stem ends in a white bulb- like or elongate rhizome which is cov- ered with numerous twisted, stiff out- growths known as grapplers. They serve for support and may absorb water and mineral nutriment. All beech-drop plants, however, if carefully dug, will be found to be attached to small beech roots. The tissues of the rhizome of the parasite are fused with those of the beech root so completely that at the point of attach- ment it cannot be definitely recognized to which plant they belong. The beech root is enlarged for some distance each way. "Fig. 12. — Beech wood decayed by Fames 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
