1) Dicot family 2) Magnoliopsid family 
• (a.) Of or pertaining to a natural order of plants of which the genus Lobelia is the type.
Lo·be`li·a'ceous adjective (Botany) Of or pertaining to a natural order of plants of which the genus Lobelia is the type. 
[adj] - belonging to the family Lobeliaceae
adjective belonging to the family Lobeliaceae
belonging to the plant family Lobeliaceae. Cf. lobelia family.