1922] 



PFEIFFER MONOGRAPH OF THE ISOETACEAE 197 



19 September, 1898, Rand (Gray Herb.) ; in clay mud, south 

 end Great Pond, Mt. Desert I., 19 September, 1898, Rand 

 (Mo. Bot. Gard. Herb.) ; west shore of Jordan Pond, Mt. 

 Desert I., in sand under water, 3 September, 1892, Rand 

 (Mo. Bot. Gard. Herb.) ; pond north of Long Pond, Mt. 

 Desert I., 22 September, 1892, Fernald (Gray Herb.) ; Rip- 

 ples Pond, 22 September, 1892, Fernald (N. Y. Bot. Gard. 

 Herb.) ; rocky bed of Great Works River, North Berwick, 

 York Co., 25 September, 1897, Fernald (Gray Herb.) ; Bub- 

 ble Pond, Mt. Desert I., 11 September, 1895, Rand (Mo. Bot. 

 Gard. Herb.); same, 18 September, 1898, Rand (Mo. Bot. 

 Gard. Herb.); ledgy margin of Stillwater River, Orono, 4 

 September, 1893, Fernald y (Gray Herb, and N. Y. Bot. 

 Gard. Herb.); submersed, at end Eagle Lake, Mt. Desert 

 I., 20 September, 1900, Rand (Gray Herb.) ; Harrison, Cum- 

 berland Co., 31 July, 1919, Fames & Godfrey 9604 (Gray 

 Herb.) ; York, August, 1893, Thaxter (Gray Herb.) ; gravelly 

 margin of Pease River, East Wilton, 11 August, 1894, Fer- 

 nald (Gray Herb.) ; mill stream, Somesville, 10 July, 1893, 

 Rand & Redfield 3121 (Mo. Bot. Gard. Herb.). 



New Hampshire: Echo Lake, N. Conway, 8 June, 1879, 

 Faxon (Mo. Bot. Gard. Herb, and Gray Herb.) ; sandy 

 bottom of ponds, Kingston, August, 1895, Eaton (N. 

 Y. Bot. Gard. Herb.); country pond, Newton, 18 August, 

 1896, Eaton 440 (Mo. Bot. Gard. Herb.); millpond, 

 Lamprey R., West Epping, 20 August, 1896, Eaton 

 (U. S. Nat. Herb, and Univ. Minn. Herb.) ; country 

 pond, Kingston, 5 August, 1896, Dodge (N. Y. Bot. 

 Gard. Herb.); bed of Lamprey R., Epping, 16 September, 

 1896, Eaton (Mo. Bot. Gard. Herb.) ; West Epping, 20 Aug- 

 ust, 1896, Eaton 482C (Mo. Bot. Gard. Herb.) ; Gustin Pond, 

 Marlow, 29 July, 1899, Fernald 186 (in part) (Gray Herb.) ; 

 Pautuckaway Pond, Nottingham, Eaton 483B (Mo. Bot. 

 Gard. Herb, and N. Y. Bot. Gard. Herb.) ; same locality, 



20 August, 1896, Eaton (Univ. Minn. Herb.) ; Epping, 12 

 August, 1896, Eaton 424, 431 (Mo. Bot. Gard. Herb.) ; Ep- 

 ping Corner, Eaton (Mo. Bot. Gard. Herb.) ; Gould Pond, 

 Greenfield, in about 3 ft. water, among yellow lilies, mud 

 over granite gravel, 24 July, 1906, Coville 2219 (Mo. Bot. 

 Gard. Herb, and U. S. Nat. Herb.) ; country pond, Kingston, 



