Fig 676: Mentha arvensis: a, habit, X %; b, corolla, spread open, x 8; c, flower, 

 X 8; d, stem (cross section), x 3; e, calyx, spread open to show the 4 nutlets, x 8; f, 

 nutlet, adaxial side, x 12; g, nutlet, abaxial side, x 12; h, inflorescence, x IV.. (From 

 Mason, Fig. 305). 



