. Fig. 234.—A few leaves enlarged from Fig. 233. The leaf to left hand bears pycnidia on red spots on the upper surface of the leaf; the remaining le;ives bear aecidia on raised portions of their surface. Several aecidia still furtlier enlarged show the peridia dehiscing by longitudinal slits, (v. Tubcuf del.) tissues occur in the year-rings as already described for G. clavariaeforme, viz. thickened twisted tracheids, loosely connected together and with fissure-like pits; medullary rays more numerous and broader; the limits of the year-ring difficult to distinguish; and a yellow pigment deposi
. Fig. 234.—A few leaves enlarged from Fig. 233. The leaf to left hand bears pycnidia on red spots on the upper surface of the leaf; the remaining le;ives bear aecidia on raised portions of their surface. Several aecidia still furtlier enlarged show the peridia dehiscing by longitudinal slits, (v. Tubcuf del.) tissues occur in the year-rings as already described for G. clavariaeforme, viz. thickened twisted tracheids, loosely connected together and with fissure-like pits; medullary rays more numerous and broader; the limits of the year-ring difficult to distinguish; and a yellow pigment deposited in the walls of all the elements. A tissue of this nature may be found round the whole circumference of a twig even in the first year after infection, and regularly each succeeding year. Woernle only rarely found zones of irregular cell-formation like those
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
