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Bulletin of Botanical Research ›› 1989, Vol. 9 ›› Issue (4): 87-90.

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A DISCOV ERY OF SECONDARY VASCULOAR TISSUE IN PHYLLITIS

Gu An-gen, Wang Mao   

  1. Jilin Agricultural university, Changchun, Jilin
  • Online:1989-12-15 Published:2016-06-13

Abstract: It was conidered in the past that cambium was inactive and therefore no sccondary vascular tissue in all piants of filicales fossil plants.