1. The grievance complained of; the substantial cause of the action; also, in general, the ground or essence of a complaint. Bouvier

Encyclopedia: Gravamen

• order Isospondyli
• order Juglandales
• order Jungermanniales
• order Lagomorpha
• order Laminariales
• order Lechanorales
• order Lepidodendrales
• order Lepidoptera
• order Lichenales
• order Liliales
• order Lobata
• order Loricata
• order Lycoperdales
• order Lycopodiales
• order Lyginopteridales
• order Madreporaria
• order Mallophaga
• order Malvales
• order mantophasmatodea
• order Marattiales
• order Marchantiales
• order Marsupialia
• order Mecoptera
• order Moniliales
• order Monotremata