[Vol. 9 

 198 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



September, 1895, Eaton (Univ. Minn. Herb.) ; Lake Cho- 

 corua, 10 September, 11)08, Farlow (Gray Herb.) ; Lamprey 

 River at Hedding, in about 10 in. water, 8 August, 1904, 

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



Vermont: Grout Pond, Stratton, alt. 2225 ft., 6-10 August, 1900, 

 Eggleston 2200 (Mo. Bot.) Gard. Herb., N. Y. Bot. Gard. 

 Herb., and Gray Herb.) ; South Pond, Marlboro, 15 Septem- 

 ber, 1895, Grout & Eggleston (N. Y. Bot. Gard. Herb.); 

 sandy shore of Kelly's Bay, Alburgh, 31 August, 1893, Eg- 

 gleston (N. Y. Bot. Gard. Herb.); Lamprey R., Epping, 

 16 September, 1899, Eaton (Univ. Minn. Herb.). 



Massachusetts: in the Mystic, not the Pond, Medford, August, 

 1848, Tuckerman (Gray Herb.), TYPE; submersed at mar- 

 gin of winter pond, Winchester, 22 September, 1908, Fernald 

 (Gray Herb.); Arlington, 15 September, 1S6T, Boott (Gray 

 Herb.); Martin's Pond, Reading, 24 August, 1869, Boott 

 (N. Y. Bot. Gard. Herb.); Pinkapog Pond, 27 August, 

 1867, Boott (N. Y. Bot. Gard. Herb.); submerged, 

 Worcester, Stone (N. Y. Bot. Gard. Herb.); Horn 

 Pond, south end, 16 September, 1869, Boott (N. Y. 

 Bot. Gard. Herb.); Kimball's Pond, Amesbury, 15 

 August, 1899, Eaton (Univ. Minn. Herb.); Mystic 

 Pond, 6 August, 1865, Boott (Mo. Bot. Gard. Herb, 

 and Gray Herb.) ; Mystic River near Boston, from 

 issue from Mystic Pond to Wood's Dam, 21 October, 

 1866, Boott (Mo. Bot. Gard. Herb, and Gray Herb.) ; east 

 side of Mystic Pond, 14 July, 1867, Boott (Mo. Bot. Gard. 

 Herb, and Gray Herb.); north and west side of Mystic 

 Pond, 9 August, 28 October, 1867, Boott (Mo. Bot. Gard. 

 Herb, and Gray Herb.) ; north and east sides of Spy Pond, 

 Arlington, 5-8 September, 1867, Boott (Mo. Bot. Gard. 

 Herb, and Gray Herb.) ; Fresh Pond, north side, 3 Septem- 

 ber, 1868, Boott (Gray Herb.); entirely submerged, Spy 

 Pond, Arlington, August, 1878, Morong (Mo. Bot. Gard. 

 Herb., N. Y. Bot. Gard. Herb., and U. S. Nat. Herb.) ; Nut- 

 ting Pond, Billerica, 11 August, 1869, Boott (N. Y. Bot. 

 Gard. Herb.) ; entirely submerged, Horn Pond, 29 October, 

 1866, Boott (Mo. Bot. Gard. Herb, and Gray Herb.); Spy 

 Pond, Arlington, 8 August, 1881, Morong (N. Y. Bot. Gard. 

 Herb.); lower end of Horn Pond, 30 June, 1867, Boott 



