Family POLYGONACEA 87 
county; Deuel county; Fairbury; Thedford; Valentine; War Bonnet 
canyon. 
3. Rumex salicifolius Weinm. 
Rumex mexicanus Meisn. 
A common weed in low, moist ground. Long Pine; Scotts Bluff 
county; Weeping Water. 
4. Rumex altissimus Wood. Pale Dock. 
A common weed over most of the state. Bassett; Callaway; Frank- 
lin; Lincoln; Ponca; Red Cloud; Wahoo. 
5. Rumex patientia L. Giant Dock. 
A weed in waste places in the eastern part of the state. Mead; 
Kearney. 
6. Rumex britannica L. Great Water Dock. 
Common in low ground. Burwell; Dismal river; Grant county; Keya- 
paha county; Long Pine. 
7. Rumex crispus L. Curled Dock. 
A common weed throughout the state. Crawford; Coon creek; Lin- 
coln; Red Cloud; Scotts Bluff county; Talmage. 
8. Rumex obtusifolius L. 
Mostly in the eastern part of the state. Burwell; Long Pine; Red 
Cloud. 
9. Rumex persicarioides L. 
A common weed all over the state. Antelope county; Bellevue; 
pent Grand Island; Kennedy; Mullen; Pishelville; Scotts Bluff; 
et. Paul. 
3. Fagopyrum. 357. 
1. Fagopyrum fagopyrum (L.) Karst. Buckwheat. 
Sometimes escapes from cultivation. 
4. Polygonum. 358. 
Wild Buckwheats and Smartweeds. 
Stems without prickles. 
Erect or decumbent herbs, never twining; calyx lobes neither 
winged nor prominently keeled in fruit. 
Leaves large, at least some of them over 5 em. long. 
Racemes continuous, flowers less than a cm. apart. 
Racemes terminal only, usually solitary. 
Usually aquatic; racemes short, leaves not acuminate. 
1. P. amphibium. 
Terrestrial in wet soil, racemes longer, leaves acuminate. 
2. P. muhlenbergii. 
Racemes several, axillary as well as terminal. 
Ocreae without a fringe of marginal bristles. 
Racemes drooping. 3. P. lapathifolium. 
Racemes erect. 
Homostylic, all styles and all stamens of about equal 
length, slightly if at all exserted. 
4. P. pennsylvanicum. 
Heterostylic, long styles 3-4 times as long as the 
short ones, the long styles and the long stamens 
exserted. 5. P. longistylum. 
