Fig. 678: a-e, Mentha spicata: a, upper part of plant, X V^', b, tip of leaf, x 1; 

 c, flower, X 5; d, corolla spread out, x 5; e, ovary and style, x 5. f-i, Mentha piperita: 

 f, upper part of plant, x i >; g, flower, x 5; h, calyx spread out, x 5; i, corolla spread out, 

 X 5. (V. F.). 



