178 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



[Vol. 9 



times wanting; sporangia oblong, 6-11 mm. long, brown-spotted, 

 1/6-1/4 covered by velum; megaspores white, 396-520 u, rarely 

 more, in diameter, with irregular commissural ridges and with 

 faces marked very irregularly by crowded short meandriniform 

 elevations, sometimes with rounded teeth ; microspores 25-35 u 

 long, smooth to slightly papillose. 



Distribution: New Hampshire, Massachusetts, New Jersey. 



Specimens examined: 



New Hampshire: shore of pond, Trickling Falls, Kingston, Aug- 

 ust, 1895, Dodge (Mc. Bot. Gard. Herb, and Gray Herb.), 

 type; flats at Kingston, August, 1896, Eaton (Mo. Bot. 

 Gard. Herb.); Kingston, 9 September, 1897, Eaton (Mo. 

 Bot. Gard. Herb, and Gray Herb.) ; sloping bank of a pond, 

 out of water most of the year, in mixed mud and sand, East 

 Kingston, September, 1895, Herb. Eaton (Mo. Bot. Gard. 



Herb, and N. Y. Bot. Gard. Herb.) ; East Kingston, August, 

 1895, Dodge (Mo. Bot. Gard. Herb.); "East Kingston, on 

 Powow River, shores of pond, fruiting out of water," 6 Oc- 

 tober, 1895, Eaton (Mo. Bot. Gard. Herb.); East Kingston, 

 26 July, 1896, Eaton 351 (Mo. Bot. Gard. Herb.); East 

 Kingston, August, 1896, Dodge (Mo. Bot. Gard. Herb, and 

 N. Y. Bot. Gard. Herb.) ; East Kingston, 8 September, 1896, 

 Eaton 589 (Mo. Bot. Gard. Herb.) ; "The flats," East Kings- 

 ton, 28 July, 1896, Dodge (Gray Herb.); East Kingston, 

 August, 1896, Eaton 163 (N. Y. Bot. Gard. Herb.) ; East 

 Kingston, 9 September, 1897, Eaton (Mo. Bot. Gard. 

 Herb.); East Kingston, 10 August, 1900, Dodge (Mo. Bot. 

 Gard. Herb.); submersed, Kingston, August and September, 

 1S!I7, Eaton 898 (Mo. Bot. Gard. Herb.); grown in pond 

 at Seabrook from plant collected at Kingston, 1900, Eaton 



(Mo. Bot. Gard. Herb.); West Epping, Eaton /+82C (Mo. 

 Bot. Gard. Herb.) ; Epping, 12 August, 1896, Eaton 4 r £7 (Mo. 

 Bot. Gard. Herb.); Lamprey River, Epping, August, 1897, 

 Eaton (Mo. Bot. Gard. Herb.); Newmarket, 19 August, 

 189:), Eaton 217 (Mo. Bot. Gard. Herb.). 



Massachusetts: Tuxbury's Pond, Amesbury, 19 September, 1898. 



Eaton 919 (Mo. Bot. Gard. Herb.); Parker River, Dodge 

 (Mo. Bot. Gard. Herb.); Long Pond, North Easton, 23 

 September, 1903, Eaton (Mo. Bot. Gard. Herb.) ; without 



