The induction, development, and heritability of fasciations . Fig. t,.—Celtis pallida: A, section of branch mm. in diameter; B, detail of presence of chlorophyll in secondary cortex; caw., cambium; , corticalband of chlorophyll; h. b., hard bast; )ued., medullary ray;/^//., phellogen;^//. d,phelloderm. But the greatest change in the chlorophyll apparatus occurs as a resultof the formation of phelloderm. The cork-cambium arises in the cells imme-diately outside the chlorophyll band and by its activity gives rise to peridermwithout and phelloderm within. The latter contains c
The induction, development, and heritability of fasciations . Fig. t,.—Celtis pallida: A, section of branch mm. in diameter; B, detail of presence of chlorophyll in secondary cortex; caw., cambium; , corticalband of chlorophyll; h. b., hard bast; )ued., medullary ray;/^//., phellogen;^//. d,phelloderm. But the greatest change in the chlorophyll apparatus occurs as a resultof the formation of phelloderm. The cork-cambium arises in the cells imme-diately outside the chlorophyll band and by its activity gives rise to peridermwithout and phelloderm within. The latter contains chlorophyll. Whenthe amount of phelloderm about equals the thickness of the chlorophjdlband no more appears to be formed. The result is that the chlorophyllband of stems from 4 mm. to cin. in diameter is about half this relation is in older stems was not learned. How long the chlorophyll remains active in the stem was not is present in the outer portions of the pith in the stems mm. diaineterafter it has disappeared fro
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