A comparison of 2 different varieties or sub-species of Eucalyptus sideroxylon

Posted on by Patrick Siu

My webpage on Eucalyptus sideroxylon features the tree which has pink flowers.

https://patricksiu.wordpress.com/eucalyptus-sideroxylon-mugga-ironbark/

This post features Eucalyptus sideroxylon which has white flowers.

The flowers are arranged in an inflorescence of 4 to 7 or more. Each flower has long pedicel.

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The development of the flower buds to flowers and finally to fruits
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The appearance of the buds, flowers and fruit are similar except the colour of the stamens and the white variety is very slightly bigger.
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The operculum (bud cap) and the arrangement of the stamens of the white flower are similar to those of the pink flower.
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The flower bud is cut vertically open to show the pistil and the stamens inside
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Transverse section of the ovary revealing the 6 carpels inside

Most flowers have 6 carpels in the ovary but a few only have 5 carpels.

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The leaves show more differences. The leave with white flowers is a bit shorter and wider than that with pink flowers.
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Fruit is globose, hemispherical or ovoid, commonly 6-locular

 

Bibliography

https://en.wikipedia.org/wiki/Eucalyptus_sideroxylon

https://www.florabank.org.au/lucid/key/Species%20Navigator/Media/Html/Eucalyptus_sideroxylon.htm

http://anpsa.org.au/e-sider.html