The Collaborative International Dictionary of English v.0.48:
Henbit \Hen"bit`\, n. (Bot.) A weed of the genus Lamium (Lamium amplexicaule) with deeply crenate leaves. [1913 Webster]WordNet (r) 3.0 (2006):
henbit n 1: Eurasian plant having toothed leaves and small two-lipped white or purplish-red flowers [syn: henbit, Lamium amplexicaule]