The induction, development, and heritability of fasciations . • 11 bandwhich is also aboutthree cells in thick-ness. A discontinuous ring of hard bast is situated within the chlorophyllband. Between the hard bast and the cambium is the region of the innercortical parenchyma. Woody cylinder: The wood is composed very larg-ely of wood fibers witha noticeably small amount of wood parenchyma. The pith is well markedbut does not need further mention in this connection. Chlorophyll occurs in the outer cortical parenchyma, in much of the par-enchyma which lies between the hard bast and the wood, in t
The induction, development, and heritability of fasciations . • 11 bandwhich is also aboutthree cells in thick-ness. A discontinuous ring of hard bast is situated within the chlorophyllband. Between the hard bast and the cambium is the region of the innercortical parenchyma. Woody cylinder: The wood is composed very larg-ely of wood fibers witha noticeably small amount of wood parenchyma. The pith is well markedbut does not need further mention in this connection. Chlorophyll occurs in the outer cortical parenchyma, in much of the par-enchyma which lies between the hard bast and the wood, in the medullar\-rays, both of wood and of cortex, and in the outer cells of the pith. * The term chlorophyll band as used in this paper refers to that portion of the corticalparenchyma tliat lies between the epidermis and the ring of mechanical tissue which isabout midway lietween the epidermis and the cambium. It is the largest and the mostenduring chlorophyll tissue in the Fig. 2.—Celtis pallida: A, section of branch 2 mm. in diam-eter; B, section of branch mm. in diameter. Cannon Plate 2
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