basal part of the awn

The term 'basal part of the awn' refers to the lower part of an awn that differs distinctly from the upper part (e. g. in Poaceae – Grass family with a geniculate awn like Arrhenatherum – Oatgrass). In many Poaceae – Grasses with geniculate awns the basal part of the awn is twisted (e. g. in Arrhenatherum – Oatgrass).