192 COMMON CANADIAN WILD PLANTS. 



3. KIIMEX, L. Dock. Soeeel. 

 * Herbage not 80u7\ nor the leaves halberd-shaped. 



1. R. orbieula'tUS, Gray. (Great Watee Dock.) Grow- 

 ing in marshes. Stem erect, stout, 5-6 feet high. Leaves 

 lanceolate; not wavy-margined or heart-shaped^ often over a 

 foot long. Flowers nodding on thread-like pedicels. Valves 

 nearly orbicular, finely net-veined, each with a grain on 

 the back. — Wet places. 



2. R. salieifo'lius, Weinmann, (White Dock) may be 

 looked for in marshes on the sea-coast and far northward. 

 The whorls of flowers are dense and form a very conspicu- 

 ous spike, owing to the great size of the grains on the back 

 of the valves. 



3. R. vertieilla'tUS, L. (Swamp Dock.) Leaves lanceo- 

 late or oblong-lanceolate, not wavy, the lowest often heart- 

 shaped. Stem tall. Fruit-bearing pedicels slender, club- 

 shaped, abrubtly refiexed, several times longer than the 

 fruiting calyx. Valves dilated-rhomboid, strongly wrinhled, 

 each bearing a very large grain. — Swamps, common. 



4. R. erispus, L. (Ctjeled Dock.) Leaves with strongly 

 wavy or curly margins, lanceolate. Whorls of flowers in 

 long wand-like racemes. Valves grain-bearing. — Cultivated 

 soil and waste places. 



5. R. obtUSifo'liUS, L. (BiTTEK Dock.) Lowest leaves 

 oblong heart-shaped, obtuse, only slightly wavy-matgined ; 

 the upper oblong-lanoeolate, acute. Whorls loose, distinct. 

 Valves somewhat halberd-shaped, deeply toothed at the base, 

 usually one only grain-bearing. — Waste grounds. 



6. R. sailg'Uin'eus, L. Leaves oblong-lanceolate, often 

 fiddle-shaped, wavy-margined. Whorls distant, in long 

 slender leafless spikes. Valves narrowly oblong, obtuse, 

 entire. Veins of the leaf red or green. — Atl. Prov. chiefly. 



7. R. marit'imus, L. (Golben Dock.) Low, slightly- 

 pubescent, much branched. Leaves linear-lanceolate, wavy- 

 margined, the lower auricled or heart-shaped at base. 

 Flowers in whorls forming leafy spikes. Valves oblong, 



