96 MISSOURI BOTANICAL GARDEN. 
EXPLANATION OF PLATES ILLUSTRATING 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, &. Acetosella L.— Rather 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, #. Geyeri (Meisn. ).— Staminate and pistillate 
plants, one-sixth size; leaves and fruiting branch, natural 
size; fruit, x4; 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, 
x 8. 
Plate 19, R. occidentalis, 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, 
