196 Bulletin 187 



P. Coiivohulus* L. (Tiiiiaria Convolvulus IL.] Webb & Moq.). Black 



Bindweed, Wild Buckwheat. Cultivated ground; common. 

 P. Donglasii Greene. Dry soil; occasional in the Champlain Valley. 

 P. erectum L. Erect Knotweed. Dooryards and roadsides; occasional. 

 P. Hydropiper L. Common Smartweed or Water Pepper, Bite-tongue. 



(Persicaria Hydropiper [L.] Opir.). Moist places; common. 

 P. Lydropiperoides Michx. (Persicaria hydropiperoides [Michx.] 



Small). Mild Water Pepper. Wet places and shallow water in 



the lower altitudes; occasional. 

 P. lapatliifoliuin L. (P. incarnatum of auth.; Persicaria lapathifolia 



[L.] S. F. Gray). Dock-leaved or Pale Persicaria. Alluvial soil; 



common. Var. nodosum (Pers.) Weinmann. Frequent. 

 P. Muhlenberyii (Meisn.) Wats. (Persicaria Muhlenbergii [S. Wats.] 



Small). Muddy or dry places of the lower altitudes of western 



Vermont; frequent. 

 P. orieiitale* L. (Persicaria orientalis [L.] Spach.). Prince's Feather. 



Occasionally persisting about gardens. 

 P. peiiiisylvanicuni L. (Persicaria pennsylvanica [L.] Small). Pink 



Knotweed, Moist soil ; common. 

 P. Persicaria* L. (Persicaria Persicaria [L.] Small). Lady's Thumb. 



Waste places; a common weed. 

 P. sagittatuni L. (Tracaulon sagittatum [L.] Small). Arrow-leaved 



Tear-thumb. Low ground; common. 

 P. scaiidens L. (P. dumetorum L., var. scandens Gray; Tiniaria scan- 

 dens [L.] Small). Climbing False Buckwheat. Moist thickets; 



frequent. 

 P. toinentosiiiit Schrank. (Persicaria tomcntosa [Schrauk] Bicknell). 



Field, Rutland, (Kirk). 

 P. rirginiauuin L. (Tovara virginiana [L.l Raf.). Moist thickets of 



the lower altitudes; occasional. 

 P. vivipaniin L. (Bistorta vivipara [L.J S. F. Gray). Mt. Mansfield, 



(Pringle). 



RUMEX. Dock. Sorrel 



R. Acetosa* L. Garden Sorrel. Charlotte, (Pringle) ; Burlington, 

 (Jones); Woodstock, (Mrs. Clara Mack). 



R. Aceto.sella* L. Field or Sheep Sorrel. Fields; common. 



R. Britaiinica L. Great Water Dock. Wet places in the low altitudes 

 of western Vermont; frequent. 



R. crispus* L. Yellow Dock, Curled Dock. Fields and waste places; 

 common. 



R. cloiiffatus* Guss. Fields; common. 



R. mexicamis Meisn. Waste places; Colchester, (Sprague) ; Burling- 

 ton and Rutland, (Mrs. N. F. Flynn) ; St. Albans, (Blake) ; Fair- 

 haven, (Brainerd). 



R. obtusifoliiis* L. Bitter Dock. Fields and waste places; common. 



R. Patientia* L. Patience Dock. Cultivated fields and roadsides; oc- 

 casional ; apparently becoming more common. 



