Annual or hardy-annual (facultative biennial), seed-propagated weed with deep taproot.
Upper leaves enclosing the stem.
See red dead-nettle, tips at the base usually not touching each other.
Stems: Erect, 10-20 cm (3.93 - 7.87 inch) high, ramified below, square, upwards softly haired.
Leaves: Crossed opposed, round-reniform, lower leaf pairs wide apart from each other, long-petiolate, upper leaves enclosing the stem, all reticulately wrinkled, margin deeply notched.