FLORA. 13 



Plantain-Leaved Everlasting. Antennaria plantagenifolia. Rock- 

 wood's pasture. April 10. 



Pearly Everlasting. Anaphilis margaritacea. Dry hills. July 13. 



Common Everlasting. Gnaphalium polycephalum. River pasture. 

 August I. 



Low Cudweed. Gnaphalium uliginosum. Roadsides. August 2. 



Elecampane. Inula Helenium. Lower Ayer road. July 30. 



Great Ragweed. Ambrosia trifida. River bank. August i. 



Roman Wormwood. Hog-weed. Ambrosia artemisiaefolia. Every- 

 where. August I. 



Cone-Flower. Black-Eyed Susan. Rudbeckia hirta. Fields. 

 June 4. 



Wild Sunflower. Helianthus strumosus. River bank. June 7. 



Wild Sunflower. Helianthus divaricatus. Roadsides. August i. 



Wild Sunflower. Helianthus decapetalus. Thickets. August. 



Jerusalem Artichoke. Helianthus tuberosus. North End. June i. 



Bur-Marigold. Stick-Tight. Common Beggar-Ticks. Bidens fron- 

 dosa. Damp places. September i. 



Swamp Bur-Marigold. Bidens connata. Swamps. August i. 



Smaller Bur-Marigold. Bidens cernua. Meadows. July r. 



Larger Bur-Marigold. Bidens chrysanthemoides. Meadows. 

 August 15. 



Water Marigold. Bidens Beckii. Meadows. August 10. 



May-Weed. Chamomile. Anthemis Cotula. Roadsides. June 25. 



Common Yarrow. Milfoil. Achillea millefolium. Fields and 

 roadsides. July i. 



White Daisy. Ox-Eye. White-Weed. Chrysanthemum leucan- 

 themum. Fields. June 5. 



Common Tansy. Tanacetum vulgare. Roadsides. July 14. 



Common Mugwort. Artemisia vulgaris. August i. Roadsides. 



Wormwood. Artemisia Absinthium. Roadsides and waste places. 

 August 6. 



Golden Ragwort. Squaw-Weed. Senecio aureus. May 20. 



Burdock. Actium Lappa. Waste places. July 12. 



Common Thistle. Cnicus lanceolatus. Roadsides and waste 

 places. July 17. 



Swamp Thistle. Cnicus muticus. Pastures. July 20. 



Canada Thistle. Cnicus arvensis. Long Hill. July 12. 



Bluebottle. Star-Thistle. Centaurea Cyanus. Waste places. 

 July 10. 



