Reniform anthers are generally having a kidney-like shape; being circular or almost circular with a notch.
The androecium is the male reproductive part of a plant. It is the third group of floral organs and is made up of microsporophyll or stamens. Each stamen usually consists of a thin filament that resembles a stalk and supports the anther or the knob-shaped spore capsule.
An angiosperm generally has bilobed anther with each lobe having two theca, i.e., dithecous.
Anthers can be reniform (Hibiscus rosa-sinensis), sinuous (a distinctive morphology similar to that seen in the cucumbers), rounded (Mercurialis), linear (Acalypha), sagittate (Vinca), etc. Reniform anthers are usually kidney-shaped anthers. As observed in Erica cinerea of the Ericaceae family, the anther can also be appendiculate in nature.
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