The term 'Plant Bristle' refers to the stiff hairs that grow on certain plants. The crossword solutions for this term are SETA (4 letters), AWN (3 letters), ARISTA (6 letters), and SETI (4 letters). SETA is a type of bristle found on grasses, while AWN is a type of bristle found on wheat and other cereal grains. ARISTA is a type of bristle found on the stems of some plants, and SETI is a type of bristle found on the leaves of some plants.