22 C. K. Dodge; 



Polygommi avicidare L., Knot Grass, Door-weed. — ^Common as a weed 

 in cities and villages, especially in yards, lawns and waste places. 



Polygonum erectmn L. Erect Knotweed. — On roadsides and in streets 

 of cities^ villages and in waste places. Plentiful throughout. 



Polygonum tenue Michx. Slender Knotweed. — Dry open ground near 

 Marquette, and on summit of Huron Mountain near Huron Mountain Club. 

 Probably frequent throughout. 



Polygonum lapathifoliiim L. {Persicaria lapathifolia L., S. F. Gray). 

 Pale Persicaria. — Wet open places at Marquette and Big Bay. Frequent 

 throughout. 



Polygonum amphibium L. (Persicaria amphibia h., S. F. Gray). Water 

 Persicaria. — Low banks of streams and small lakes and often in shallow 

 water where it floats like a pondweed. 



Polygonum Hydropiper L- {Persicaria hydropiper L., Opiz.). Common 

 Smartweed. — Moist open or partially shaded ground near Marquette and 

 at Big Bay. Probably frequent throughout. 



Polygonum acre HBK. {Persicaria punctata Ell, Small). Water Smart- 

 weed. — Wet open places or often in shallow water near Marquette and at 

 Big Bay. Frequent throughout. 



Polygonum Persicaria L. {Persicaria persicaria L., Small). Lady's 

 Thumb. — Open damp ground, usually a weed in cities, villages and waste 

 places. Common throughout. 



Polygonum hydropipcroidcs Michx. {Persicaria Jiydropiperoides Michx., 

 Small). Mild Water Pepper. — Margin of Independence Lake and in shal- 

 low water at Big Bay. Apparently infrequent. 



Polygonum sagittattim L. {Tracaulon sagittatum L., Small). Arrow- 

 leaved Tear-thumb. — Low open or partially shaded ground about Marquette. 

 Frequent throughout. 



Polygonum Convolvulus L. {Tiniaria convolvulus Webb & Moq.). Black 

 Bindweed. — A weed in gardens, other cultivated grounds and waste places. 

 Common throughout. 



Polygonum cilinode Michx. {Tiniaria cilinodis Michx., Small). Fringed 

 Black Bindweed. — ^Dry sandy ground or rocky hills near Marquette. Fre- 

 quent throughout. 



Fagopyrum esculentum Moench. {F. fagopyrum L., Karst.). Buck- 

 wheat. — Occasional in waste places of cities and villages throughout. Per- 

 haps not a permanent escape. 



Polygonella articulata (L.) Meisn. Coast Jointweed. — Dry open sandy 

 ground near Marquette. Probably frequent throughout. 



chknopodiackae: 



Cyclolonia atriplicifolinm (Spreng.) Coult. Winged Pigweed. — Sandy 

 ground in waste places about Marquette. 



Chenopodiuin Botrys I<. Jerusalem Oak. — In waste places as a weed 

 about cities and villages. 



Chenopodium capitatum (L.) Asch. (Blifuni capitation L.). Strawberry 

 Blite. — Dry open ground near Marquette. Occasional throughout. 



