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ccr-p 



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LONaiTUDlNAL ^ECT/QN 



138. Pine branch: {ck) cork, {cc) cork cambium, {col) collenchsmia, {cor.-p) cor* 

 tical parenchyma, (rd) resin duct, {oh) old bast, {sp) sieve-plate, {si) sieve- 

 tube, {bp) bast parenchyma, (p) pit, {mr) medullary ray. 



