Calyx symmetry

Refers to the symmetry of the calyx tube and lobes, specifically the calyx lobes size in relation to each other.

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Apparently actinomorphic

The calyx lobes are more or less equal in size and shape (or rarely, lobes are absent). The calyx is radially symmetrical, i.e. it can be bisected into basically similar halves in at least two vertical planes.

Prominently zygomorphic

The calyx lobes are unequal in shape and/or size. The calyx is bilaterally symmetrical, i.e. symmetric about 1 vertical plane only. Commonly, the upper two calyx lobes may be enlarged, united further towards their apex and/or are differently shaped at the apex relative to the lower three (e.g. Bossiaea spp.). Note that for several taxa one or more of these conditions occurs, although not strongly so (e.g. Jacksonia, Gompholobium, some Daviesia spp.). When zygomorphy is not pronounced, taxa are treated as being actinomorphic.