24 University of Texas Bulletin 



Persicaria lapathi folia S. F. Gray. (Polygonum iapathi folium L.) 

 Willow Weed. 

 Low ground, waste places. 

 Naturalized from Europe. Widespread in North America. 



Persicaria pennsylvanica Small. (Polygonum pennsylvanicum L.) 

 Smart Weed. 

 River bank. With dense cylindrical racemes of pink flowers. 

 Eastern North America and in Mexico. 



Persicaria punctata Small. (Polygonum punctatum Elll.) Smart 

 Weed. 



River bank, Barton Creek, etc. With loosely flowered racemes of 

 small greenish flowers. 



Widespread in North America. 



Persicaria setacea Small. (Polygonum setaceum Baldw.) 

 Waller Creek. 

 Eastern United States. 



Polygonum erectum L. 



River bank. In open ground. 



Ontario to the Northwest Territory, Georgia, Colorado, and Texas. 



Polygonum ramosissimum Michx. Bushy Knotweed. 

 Roadsides. 



Rumex altissimus Wood. Peach-leaved Dock. Pale Dock. 



Low wet ground. Abundant in Shoal Creek Valley. Two to four 

 feet tall. 



Northwestern and central states. 



Rumex Berlandieri Meisn(?) 



Waste places. A form with slender, spreading branches. Flowers 

 in dense whorls separated on the branches. 



Texas to Arizona and in Mexico. Western North America. 



Rumex crispus L. Curl Dock. 



Low wet ground. Abundant in Shoal Creek Valley. One to three 

 feet tall; leaves with edges crisped. 



Naturalized from Europe. Widespread in North America. 



Tiniaria convolvulus Webb and Moq. (Polygonum convolvulus L.) 

 Black Bind-Weed. 



University campus. A twining vine with the aspect of a morning 

 glory. Not common here. 



Naturalized from Europe. Widespread in North America. 



