MICHIGAN ACADEMY OF SCIENCE. 197 



Helianthus maximiliani Schrad. Maximilian's Sunflower. Near a grain 

 elevator at Point Edward. An immigrant. 



Helianthus divaricatus L. Rough Sunflower. — Common in dry open 

 woods and thickets. 



Helianthus hirsutus Raf . Stiff-haired Sunflower. Plentiful about a grain 

 elevator at Point Edward. 



Helianthus strumosus L. Pale-leaved Wood Sunflower. — Frequent in 

 damp thickets and along banks of streams. 



Helianthus tracheliifolius Mill. Throatwort sunflower. — Occasional on 

 borders of dry open woods. 



Helianthus decapetalus L. Thin-leaved Sunflower. — Occasional in damp 

 open woods, thickets and on damp shaded banks of streams. 



Helianthus tuberosus L. Jerusalem Artichoke. — Apparently an escape 

 from cultivation in this locality. 



Coreopsis tinctoria Nutt. Garden Tickseed. — Inclined to escape and per- 

 sist in sandy ground at Point Edward. 



Coreopsis tripteris L. Tall Coreopsis. — Not yet noticed in Lambton Co. 

 but found near Algonac, St. Clair Co., Mich. 



Bidens discoidea (T. and G.) Britton. — Small Beggar-ticks. — Occasional in 

 swampy places near Forest. N. Tripp. 



Bidens frondosa L. Beggar-ticks. — Common in damp ground. A weed in 

 damp open ground and cultivated fields. 



Bidens comosa (Gray) Wiegand. Leafy-bracted Tickseed. — Occasional in 

 rich ground. 



Bidens connata Muhl. Swamp Beggar-ticks. — Frequent in ditches and 

 swamps. 



Bidens cemua L. Stick-tight. — Common in wet open places. 

 Bidens laevis (L.) BSP. Larger Bur-marigold. — Common in swamps and 

 wet open places. 



Bidens trichosperma tenuiloba (Gray) Britton. Tickseed Sunflower. — 

 Frequent in marshy places. The species has not yet been noticed. 



Bidens beckii Torr. Water Marigold. — Frequent in stagnant and slow- 

 flowing water among sedges and other plants on the delta islands of St. 

 Clair River, and in pools along the Aux Sables River at Port Franks. New- 

 ton Tripp. 



Galinsoga parviflora Cav. Galinsoga. In waste places of cities and vil- 

 lages and in depot grounds. Often abundant. 



Helenium autumnale L. Sneezeweed. — Frequent in wet ground and along 

 banks of streams. 



Achillea millefolium L. Common Yarrow. — Common everywhere in dry- 

 ish open ground. 



Anthemis cotula L. May-weed. — Common on roadsides and in cultivated 

 grounds and about farm buildings. 



Chrysanthemum leucanthemum pinnatifidum Lecoq and Lamotte. Ox- 

 eye Daisy. — Very common as a weed in hay fields. Often abundant along 

 railways. 



Chrysanthemum segetum L. Corn Marigold. — Apparently growing wild 

 among weeds on Wal})ole Island. 



Chrysanthemum balsamita tanacetoides Boiss. Costmary. — Well estab- 

 lished as an escape to roadsides and fields. 



Tanacetum vulgare L. Common Tansy. — Well established as an escape 

 to roadsides and waste places. 



Tanacetum vulgare crispum DC. Crispy Tansy. — Common in many places. 



