in one line; in one row
• (a.) Arranged in a single row on one side of an axis, as the flowers in grasses of the tribe Chloridae.
Mo·nos'ti·chous (mo*nŏs'tĭ*kŭs) adjective [ See Monostich .] (Botany) Arranged in a single row on one side of an axis, as the flowers in grasses of the tribe Chloridæ . 
In one row.