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Australian Journal of Botany Australian Journal of Botany Society
Southern hemisphere botanical ecosystems
RESEARCH ARTICLE

Operculum development and evolution in Eucalypts

LD Pryor and RB Knox

Australian Journal of Botany 19(2) 143 - 171
Published: 1971

Abstract

Operculum development of 62 species in seven subgenera of Eucalyptus was traced by rapid freeze-sectioning techniques and a comparative study was made of the perianth in Angophora. Four principal pathways of operculum development were detected. In those species having two perianth whorls, sepal and petal primordia were always initiated sequentially but with variation in the time involved between their appearance. In those with a single operculum shown to be calycine, the petaline whorl was totally suppressed.

https://doi.org/10.1071/BT9710143

© CSIRO 1971

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