96 MISSOURI BOTANICAL GARDEN. 



EXPLANATION OF PLATES ILLUSTKATING THE NORTH 

 AMERICAN SPECIES OF RUMEX. 



The figures were drawn, under supervision of the author, 

 by Mrs. J. C. Duffey and Miss Grace E. Johnson, whose 

 signatures indicate the plates drawn by each. Nos. 13, 14, 

 22, 23, 25, 28, 30, 31 and 32 are from living plants; the 

 remainder, from herbarium specimens. Illustrations of 

 fruit are from drawings by the author. 



Plate 13, ft. Acetosella L. Bather large plant, reduced 

 to half size; and fruit, inclosed in calyx, x 8. 



Plate 14, R. hastatulus, Baldw. Staminate and pistil- 

 late plants, half size; fruiting branch, natural size; fruit, 

 x 4 ; achenium, x 8. 



Plate 15,7?. Geyeri (Meisn.). Staminate and pistillate 

 plants, one-sixth size ; leaves and fruiting branch, natural 

 size ; fruit, x 4 ; achenium, x 8. 



Plate 16, R. Acetosa, L. Staminate and pistillate plants, 

 one-sixth size; leaf and fruiting branch, natural size; fruit, 

 x 4; achenium, x 8. 



Plate 17, R. venosus, Psh. Habit, one-sixth size; 

 leaves and fruit, natural size ; achenium, x 8. 



Plate 18, R. hymenosepalus, Torr. Roots and habit, 

 one-sixth size ; leaf, half size ; fruit, natural size ; achenium, 

 x8. 



Plate 19, R. occidentalism Wats. Habit, one-sixth size; 

 leaf, half size ; fruiting branch, natural size ; achenium, 

 x8. 



Plate 20, R. Patientia, L. Habit, one-sixth size ; leaf, 

 half size; fruiting branch, natural size; achenium, x 8. 



Plate 21, R. Britannica, L. Habit, one-sixth size; 

 leaf, half size; fruiting branch, natural size; fruit, x 4; 

 achenium, x 8. 



Plate 22, R. crispus, L. Habit, one-sixth size; leaf, 



