294 Lake Maxinkuckee, Physical and Biological Survey 

 290. VIRGINIA KNOTWEED 



TOVARA VIRGINIANA (L.) Raf. 



Not abundant about the lake; found growing in woods and 

 shaded situations. 



291. WATER PERSICARIA 



PERSICARIA AMPHIBIA (L.) S. F. Gray 



A few plants noted at Norris Inlet in 1909. The leaves floating 

 on the water give the plant much the aspect of Potamogeton natans. 

 The racemes of rose-colored blossoms are rather short, and the 

 stem long and strong, rooting at the nodes. 



292. SWAMP PERSICARIA 



PERSICARIA MUHLENBERGII (S. Wats.) Small 



Common along the south shore of Outlet Bay and near the Out- 

 let; a large patch in the pond below Farrar's, and some on the 

 sedgy flat southwest of the lake. 



The dense rose-pink spikes of this species, projecting up from 

 the surface of the water at the edge of the lake, make this species 

 one of the most attractive of water plants, and it is well worth 

 planting for its ornamental value. The blossoms make quite hand- 

 some boquets. It is quite likely that wild ducks, which often stray 

 into flat marshes in search of smart-weed seed, find patches of this 

 plant desirable feeding grounds. 



293. DOCK-LEAVED OR PALE PERSICARIA 



PERSICARIA LAPATHIFOLIA (L.) S. F. Gray 



Fairly common along the lake shore in moist places, by the 

 Monninger and Meyer cottages, south of Green's, north of Long 

 Point and east of Norris Inlet. 



294. PENNSYLVANIA PERSICARIA 



PERSICARIA PENNSYLVANICA (L.) Small 



A rather common, homely weed along the lake shore and other 

 moist places, continuing in blossom as late as October 31. Some of 

 the plants seen were badly affected by plant lice. 



295. LADY'S THUMB; HEARTWEED 



PERSICARIA PERSICARIA (L.) Small 



A rather coarse, large-leaved smartweed usually common in 

 waste places and cultivated grounds. A few plants found, along the 



