Fig. 309: a-d, Eurystemon mexicauum: a, habit, X V2', b, flower, X 2\'y, c, stamens, 

 X 2V2', d, capsule, X 1 and enlarged, X 2y->. e-g, Heteranthera reniformis: e, habit, 

 X 1; f, flowers, X 21,^; g, seed, X 10. (V. F.). 



