BLOCK ISLAXD. 65 



4. Jiincus aciumnatiis Michx. Abundant in the peat bogs. 

 Commonly proliferous. 



5. Sniilax rottindifolia \^. Rare. Only a few scattered plants, 

 in widely separated localities on the south end of the island. 



6. SisyrincJiiiun Atlantictini Bicknell. Common. Probably 

 included by Mr. Bailey under ^. anceps Cav. 



7. Popiilus balsamifcra cmidicans (Ait.) A. Gray. Sparingly 

 established in certain swamps. Common in cultivation. 



8. Salix cordata Muhl. Common in many swamps and 

 along roadsides. Occasionally planted. 



9. Salix covdata angustata (Pursh) Anders. Abundant in 

 one swamp near the south side of Great Salt Pond. 



10. Salix purpurea L. Abundant and thoroughly natural- 

 ized along roadsides. 



11. Ruincx obtiisifolius L. Sparingly, in a ditch along south 

 side of Main St. 



12. Glaiiciinn Glaitciinn (L) Karst. A few plants, on the 

 sand hills near Grace Point. 



13. Roripa paliistris (L.) Bess. Sparingly, in a ditch along 

 south side of Main St. 



14. Trifoliiun incarnatiun L. One plant, in a field at the 

 south end of the island. Probably introduced with other clover 

 and hardly naturalized. 



15. Trifoliiun proawibens \^. Not common. 



16. Acalypha gracilens A. Gray. Common in dry open 

 fields. Usually stunted. Probably included by Mr. Bailey 

 under A. Virginica L. 



17. Vicia sativa L. Common. 



18. Hiidsonia tomentosa Nutt. Abundant on the sand hills 

 near Grace point. 



19. Onagra Oakesiana (A. Gray) Britton. Not rare near 

 the shore. Probably included by Mr. Bailey under ^nothera 

 biennis L. 



20. Lysiniachia qnadrifolia L. Common. 



21. Trientalis Americana Pursh. Common. 



22. Asclepias piilcJira Ehrh. Common. 



23. Sericocarpus asteroides (L.) B. S. P. Abundant in a lim- 

 ited locality at the south end of the island. 



Annals N. Y. Acad. Scr., XI, April 20,, 1898 — 5. 



