202° POLYGON ACEAE 
flowers. Fruit, smooth, shining, dark red, winged or triangular, not 
heart-shaped. Swamps. In bloom from May to September. 
5. R. verticillatus, L. (Fig. 10, pl. 32.) Swamp Dock. Leaves ob- 
long, lance-shaped, acute at each end, 2 to 12 in. long. Flower cluster 
a tall spike, densely crowded with whorls of green flowers, 10 to 30 
flowers each; and leafless. Leaves with long stalks; wings of fruit, 
diamond-shaped. Plant 2 to 5 ft. high. In swamps. May to July. 
6. R. altissimus, Wood. (Fig. 8, pl. 32.) Tart Dock. PEAcH- 
LEAVED Dock. Leaves narrow elliptic, acute each end, 2 to 10 in. long. 
Flower panicles leafless with interrupted dense clusters of light green 
flowers. Wings of fruit triangular, cordate at base. Plants 3 to 4 ft. 
high. Swamps and moist places. April-June. 
+ Leaves as in §§, but with wavy borders 
7. R. Patientia, L. (Figs. 1 and 6, pl. 32.) Patrence Dock. Lower 
leaves broad lance-shaped, 4 to 16 in. long, borders wavy; flower panicle 
of dense whorls of green flowers. Seed wings broad, nearly orbicular or 
kidney-shaped, cordate, obscurely toothed at margin. Plant 3 to 5 ft. tall. 
8. R. britannica, L. (Fig. 13, pl. 32.) Great Water Dock.. Leaves 
broad lance-shaped, 1 to 2 ft. long, somewhat wavy margined. Flower 
panicle nearly leafless. Fruit wings broadly triangular, cordate, the 
margins distinctly toothed. Swamps and wet places. July-August. 
££ Leaves cordate at base. Flower panicles more or less interrupted 
® R. crispus, L. (Fig. 9, pl. 32.) Curtep Dock. YELLOW Dock. 
Leaves lance-shaped, 6 to 12 in. long, margins strongly wavy. Flowers 
in long wand-like panicles, leafless above; seed wings heart-shaped. Plant 
3 to 4 ft. high. Fields and waste cultivated grounds. 
10. R. sanguineus, L. (Fig. 4, 12, pl. 32.) Broopy Dock. RED-VEINED 
Dock. Leaves lance-shaped or oblong, often fiddle-shaped; 1 to 5 in. long; 
panicle of flowers leafless; whorls at some distance from each other. 
Seed wings club-shaped. Plant 1 to 3 ft. high. Waste cultivated grounds. 
May to August. 
ll. R. obtusifolius, L. (Figs. 2 and 7, pl. 32.) Fippte Dock. 
Stem somewhat rough. Leaves broad ovate, heart-shaped at base, blunt 
at apex, 6 to 14 in. long, wavy margined. Whorls, few flowered and dis- 
tant, seed wings halberd-shaped with conspicuous spines or awl-shaped 
teeth. Plant 1 to 3 ft. high. In waste places. June to August. 
tt Flowers in a dense uninterrupted panicle 
12. R. persicarioides, L. (Fig. 14, pl. 32.) Gotpen Dock. Leaves 
narrow lance-shaped, blunt or even slightly cordate at base, more or less 
wavy. Plant erect or prostrate, 1 to 3 ft. high. Flowers in a dense 
uninterrupted spike. Seed wings with 4 or 5 long spine-like bristles. 
Sandy shores. July to Oct. 
2. FAGOPYRUM, Tourn. 
Annual herb, widely cultivated, most of the plants found wild are 
from seeds escaped from cultivated fields. Leaves alternate, deltoid or 
halberd-shaped, Collaret (ocrea) cylindric, The 5 divisions of the calyx 
