Fig. 670: a-c, Monarda fistulosa: a, top of plant, x V2', b, flower, x 2; c, headlike 

 cluster of calyces with fruit, x 2. d and e, Pycnantliemum tenuifolium: d, top of plant, 

 X U; e, flower, x 5. (V. F.). 



