1922] 



PFEIFFER MONOGRAPH OF THE ISOETACEAE 165 



Herb.) ; Connecticut River, Norwich, September, 1876, Jesup 

 (N. Y. Bot. Gard. Herb.). 



Massachusetts : 



Essex Co.: Attitash, 27 June, 1896, Eaton 197 (Mo. Bot. Gard. 

 Herb.); muddy banks of Merrimac River, Newburyport, 

 1895, Eaton (Dudley Herb.) ; Attitash, 31 July, 1896, Eaton 

 380 (Mo. Bot. Gard. Herb.) ; Kimballs Pond, Amesbury, 15 

 August, 1899, Eaton 192 (Mo. Bot. Gard. Herb.) ; Kimballs 

 Pond, Amesbury, 13 August, 1899, Eaton (Mo. Bot. Gard. 

 Herb, and Univ. Minn. Herb.) ; Kimballs Pond, Amesbury, 

 13 August, 1896, Eaton (Mo. Bot. Gard. Herb.) ; Tuxbury's 

 Pond, Amesbury, 19 September, 1897, Eaton 919 (Mo. Bot. 

 Gard. Herb.) ; Marshall's Pond, Amesbury, 13 August, 1903, 

 Eaton (Mo. Bot. Gard. Herb.); Crane Pond, Bagfield, 6 

 July, 1893, Lunt (Gray Herb.); Bates Pond, Wenham, 29 

 July, 1896, Eaton 377 (Mo. Bot. Gard. Herb.); Pleasant 

 Pond, Wenham, C. E. Faxon 6 (Mo. Bot. Gard. Herb.) ; 

 Pleasant Pond, Wenham, without date or number, C. E. 

 Faxon (Gray Herb.); Beaver Pond, Beverly, August, 1870, 

 Russell (Mo. Bot. Gard. Herb.) ; bank of Merrimac, New- 

 buryport, 12 September, 1895, Eaton (Mo. Bot. Gard. Herb, 

 and Univ. Minn. Herb.) ; bank of Merrimac, Newburyport, 

 August, 1895, Eaton (N. Y. Bot. Gard. Herb.); Chatt- 

 wick's Pond, W. Boxford, 1 September, 1882, Robinson (Mo. 

 Bot. Gard. Herb.) ; banks of Merrimac R., Newburyport, 12 

 September, 1897, Eaton (Univ. Minn. Herb.); Manchester 

 and vicinity, without date, Chamberlain (N. Y. Bot. Gard. 

 Herb.) ; muddy pool, Amesbury, 13 August, 1899, Eaton 

 (Univ. Minn. Herb.) ; Ipswich River, Ipswich, 29 July, 1874 

 and 1875, Morong (N. Y. Bot. Gard. Herb.) ; Ipswich River, 

 Ipswich, July, 1875, Morong (U. S. Nat. Herb.) ; East An- 

 dover, 1903, Holt (Gray Herb.); Wenham, Collins (Gray 

 Herb.) ; pond on Skug River, above Sawmill Road, 22 

 September, 1903, Pease 2775 (Gray Herb.). 



Middlesex Co.: Woburn, 16 November, 1862, without collector's 

 name (Mo. Bot. Gard. Herb.) ; Woburn, 3 September, 1866, 

 Boott (Gray Herb.); Small Round Pond, Woburn, 8 Sep- 

 tember, 1867, Boott (Mo. Bot. Gard. Herb.); Small Round 

 Pond, Woburn, 23 September, 1867, Boott (Mo. Bot. Gard. 

 Herb.) ; Small Round Pond, Woburn, 5 August, 1860, Boott 



