Nettle-Hemp, or Galeopsis, L. a genus of native plants, consisting of four species, the principal of which is the Tetrahit, Common Hemp nettle, or Nettle-hemp All-heal. It grows in hedges, corn-fields, and among rubbish; flowers in the months of July and August.—In Thuringia, the small seeds of this plant are collected by the poor, and not only sold in considerable quantities as food for birds, but their sweet-oil likewise is expressed ; as it affords an excellent supply for chamber-lamps. Hence, Bechstein advises the cultivation of this vegetable, chiefly on account of its mild salad-oil, which the seeds yield in a large. proportion.