<p><i><a href="//commons.wikimedia.org/wiki/Acacia_tetragonophylla" title="Acacia tetragonophylla">Acacia tetragonophylla</a></i>
1, part of a phyllodium.
2, flower-head.
3, bracts.
4, unexpanded flower.
5, expanded flower.
6, front- and back-view of a stamen.
7, pollen-grains.
8, pistil.
9, lower portion of a fruit-valve with seeds.
10, a seed separated.
11, transverse section of a seed.
12 and 13, longitudinal sections of seeds.
</p>
All enlarged, but to various extent.
Ferdinand von Mueller
1888
Iconography of Australian species of Acacia and cognate genera (1887-88)