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In Labiate plants, as the dead-nettle (Lamium), the flowers are produced in the axil of each of the foliage leaves of the plant, and they appear as if arranged in a simple whorl of flowers.
So also in Labiatae, such as dead-nettle (Lamium), the different whorls of inflorescence are developed centripetally, while the florets of the verticillaster are centrifugal.
Contracted form (Verticillaster), Dead-nettle, Pelargonium.
In winter wheat, crop density is an important factor in limiting seed production by red dead-nettle through the effect on weed biomass.
Who hasn't sucked the nectar from the flower of the dead nettle?