Fig. 569: Myriophyllum verticillatum: a, leaf form occurring at tip of stem, x 3; 

 b-d, emersed leaves, x 3; e, submersed leaf, each of its divisions with a globose tip, 

 X 2; f, mature nutlet, x 6; g, young pistillate flower, x 12; h, habit, plant developing 

 from a winter bud, showing the various leaf types, x %; i, habit, upper part of inflores- 

 cence, a winter bud in leafy apex, x 1%; j, fruit, showing rudimentary petals and 

 subtending bracteoles, x 6; k, fruit, top view, x 6; 1, leaf axil, the flower removed to 

 show the palmately lobed bracteoles, x 20. (From Mason, Fig. 283). 



