Thesium
in botany, the bastard toadflax, a genus of Santalacex. Flowers small, green; perianth four or five-cleft, persistent; stamens with a small fascicle of hair at their base; drupe ribbed, crowned with the persistent perianth.
Known species about 60, all from the Eastern Hemisphere. T. linophyllum is a perennial parasite on roots, with diffuse stems, minute flowers, green outside, white inside, with green ovoid fruit.