MICHIGAN ACADEMY OF SCIENCE. 161 



Polygonum muhlenbergii (Meisn.) Wats. Swamp Persicaria. — Common 

 on borders of ponds, lakes, in swamps and shallow water of slow streams. 



Polygonum pennsylvanicum L. Pemisylvania Persicaria. — Frequent in 

 damp moist ground and damp waste places. 



Polygonum hydropiper L. Common Smartweed. — Common in damp and 

 usually rich open or shaded ground. 



Polygonum acre HBK. Water Smartweed. — Occasional in wet marshy 

 places and along the low wet banks of streams. 



Polygonum orientale L. Prince's Feather. — Occasionally escaping from 

 cultivation and persisting. Often a garden weed. 



Polygonum persicaria L. Lady's Thumb. — Common in damp and waste 

 places. 



Polygonum hydropiperoides Michx. Mild Water Pepper. — Very common 

 in damp ground, shallow water, ditches, and along slow streams. 



Polygonum virginianum L. Virginia Knotweed. — Common in damp rich 

 open woods and thickets. 



Polygonum sagittatum L. Arrow-leaved Tear-thumb. — Common in low 

 damp open or shaded ground. 



Polygonum convolvulus L. Black Bindweed. — Common as a weed in 

 cultivated and waste grounds. 



Polygonum cilinode Michx. Fringed Black Bindweed. — Frequent in open 

 woods and thickets. 



Polygonum scandens L. Climbing False Buckwheat. — Frequent in moist 

 thickets. 



Polygonum cuspidatum Web. and Zuce. Japanese Knotweed. — Often 

 planted and persisting for many years but not permanently escaping. 



Fagopyrum esculentum Muench. Buckwheat. — Escaping from cultiva- 

 tion to roadsides and copses and persisting at least for a time. Often re- 

 maining as a weed in cultivated fields. 



Polyganella articulata (L.) Meisn. Coast Jointweed. — Occasional on the 

 sand dunes along Lake Huron. 



Chenopodiaceae. Goosefoot Family. 



Cycloloma atriplicifolium (Spreng.) Coult. Winged Pigweed. — Occasional 

 in poor and sandy ground. Noticed in particular in sand at Point Edward. 



Kochia scoparia (L.) Schrad. Kochia. — An ornamental plant inclined to 

 escape and persist. 



Chenopodium ambrosioides L. Mexican Tea. — Waste places in towns, 

 villages and cities. Apparently infrequent. 



Chenopodium botrys L. Jerusalm Oak. Feather Geranium. — Frequent 

 in sandy ground. Abundant at Point Edward. 



Chenopodium capitatum (L.) Asch. Strawberry Blight. — Frequent in poor 

 ground and on newly cleared land. 



Chenopodium glaucum L. Oak-leaved Goosefoot. — In cities, villages, 

 towns, gardens and fields. Frequent. 



Chenopodium hybridum L. Maple-leaved Goosefoot. — Frequent in open 

 woods and waste places. Often a field and garden weied. 



Chenopodium album L. Lamb's Quarters. Pigweed. — Very common as 

 a weed in fields, gardens, and waste places. 



Chenopodium urbicum L. Upright Goosefoot. — Noticed as a weed near 

 Lambton. Apparently infrequent. 



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