20 NATURAL HISTORY AND TOPOGRAPHY OF GROTON, MASS. 



Wild Orange Red Lily. Wood Lily. Lilium Philadelphicum. 

 Elm Avenue. July 5. 



Turk's-Cap Lily. Lilium superbum. Escaped. July 28. 



Wild Yellow Lily. Meadow Lily. Lilium Canadense. Quaso- 

 ponagon Meadows. July 3. 



Tiger Lily. Lilium tigrinum. Waste places. July 1. 



Indian Cucumber-Root. Medeola Virginiana. Our woods. June 14. 



Purple Trillium. Birthroot. Trillium erectum. Townsend road. 

 Rare. May 12. 



Nodding Trillium. Trillium cernuum. Old road. May 10. 



Painted Trillium. Trillium erythrocarpum. Rare. Our woods. 

 May 10. 



American White Hellebore. Indian Poke. Veratrum viride. 

 Roadsides. June 1. 



Pickerel-Weed. Pontederia cordata. Quasoponagon meadows. 



July 7- 



Common Spiderwort. Tradescantia Virginica. Long Hill. Es- 

 caped. June 19. 



Common Soft Rush. Juncus effusus. Meadow. August 1. 



Common Cat-Tail. Typha latifolia. Meadows. Broad Meadow. 

 June 20. 



Bur-Reed. Sparganium eurycarpum. Low land. May 20. 



Jack-in-the-Pulpit. Indian Tumi]). Arisaema triphyllum. Mead- 

 ows. May 12. 



Arrow Arum. Peltandra undulata. Wrangling Brook. June 16. 



Water Arum. Wild Calla. Calla palustris. Our woods. May 26. 



Skunk Cabbage. Symplocarpus foetidus. Meadow. Formerly 

 blossomed in February, of late years in September. 



Sweet Flag. Calamus. Acorus Calamus. Quasoponagon mead- 

 ows. June 10. 



Duckweed. Duck's-Meat. Lemna minor. Ditches on Broad 

 Meadow. July 1. 



Water Plantain. Alisma Plantago. Quasoponagon meadows. July 20. 



Arrow-head. Sagittaria variabilis. Brooks. July 15. 



Sagittaria heterophylla. Meadows. August 1. 



Pipewort. Eriocaulon septangulare. Meadows. July 1. 



Pennsylvania Sedge. Carex Pennsylvania. Meadows. April 5. 



Many other Sedges. 



Witch. Couch. Quick Grass. Agropyrum repens. 



Many other Grasses. 



