However, flowers in Lepidosperma tetraquetum differ from the typical trimerous pattern, having a tetragonal culm and tetramerous
In contrast, the Antillean clade of "Cinnamodendron" is characterized by having tetramerous
flowers (8 petals, 8 stamens, 4 carpels; ovary with 4 placentae), many ovules (more than 14); not stipitate, many seeded fruit (more than 8) with a non-gelatinous pulp; small seeds (up to 3 mm long) (Fig.
recognition that tetramerous or dimerous flowers are basic to the basal
decussately opposite dimerous whorls form a superficially tetramerous
We doubt that this process is possible, because reversals to radially symmetric flowers in asterids operate via the loss of the posterior staminode and the fusion of the posterior petals and the transition to tetramerous
flowers (see, e.g., Ronse Decraene & Smets, 1994; Endress, 1999).
The Escalloniaceae, a present-day taxon of this complex, is of interest, in particular the genus Tetracarpaea, which has an apocarpous gynoecium and tetramerous
flowers, this first character being associated with the Apocynaceae and the latter with the Scrophulariales via the Buddlejaceae.