650 PROCEEDINGS OF THE NATIONAL BIUSEUM. vol.xxiii. 



Isoetes echinospora braunii (Durieii) Entrelm. in A. Gray, Manual ed. 5. 

 676. 1«()7. 



Isoetes hraunil Durieu, Bull. Soc. Bot. France 11 : 101. 1864. 

 Isoetes echinospora var. honttil Engelm. in A. Gray, ^Manual ed. 5. 676. 1867. 

 Labrador and Greenland to Alaska, sonthward to New England, New Jersey, 

 Pennsylvania, Michigan, Utah, and southern "Washington. 



Isoetes echinospora robusta Engelm. Trans. St. Louis Acad. Sci. 4 : 380. 

 18S2. 

 Isle La Motte in Lake Champlain {Pringh:); Epping, New Hampshire (.1. A. 

 Eaton) . 



Isoetes echinospora muricata (Durieu) Eng-elm. in A. Gray, Manual ed. 5. 



676. 1867. 



Isoetes muricata Durieu, Bull. Soc. Bot. France 11 : 100. 1864. 

 Near the St. John at Madawaska, Maine {Fernald); Rockingham County, New 

 Hampshire {A. A. Eaton) ; near Boston, Massachusetts; Lyme, Connecti- 

 cut (C. B. Graves) ; Toms River, New Jersey {Parker dc Snnt]i; Pollard). 



Isoetes bolanderi Engelm. in Parry, Am. Nat. 8 : 214. 1871. 



^Montana and Washington to western Colorado, Utah, and California. 



Isoetes pygmaea Engelm. in Parry, Am. Nat. 8 : 211. 1871. 

 Mono Pass, California (i'o/o»(/('r). 



Isoetes macounii A. A. Eaton, Fern Bull. 8 : 12. 1900. 

 Atka Island, Alaska [Macotin). 



Isoetes maritima I7nderw. Bot. Gaz. 13 : 01. 1888. 



Alberni, Vancouver Island, British Columl)ia {Macoun). 



Isoetes canadensis (Engelm.) A. A. Eaton, comb. nov. 



Isuites riparla x&v. canadensis Engelm. Trans. St. Louis Acad. Sci. 4 : 383. 1882. 



Isoetes dodrjei A. A. Eaton, Fern Bull. 6 : 6. 1898. 

 Hastings County, Ontario {Macoun)\ East Wilton {Fernald), Cornish {Chicker- 

 ing), and Kennebunk, Maine; rx))ridge {Rohbins), and Dedham {Faxon), 

 Massachusetts; Brattleboro, Vermont {Frost); Kingston, New Hampshire 

 {A. A. Eaton); Point Pleasant {Best), and Bethlehem, Pennsylvania. 



Isoetes eatoni Dodge, Ferns & Fern Allies New Eng. 39. 1896. 



Several L (calities in Rockingham County, New Hampshire. Also in Essex County, 

 ^Massachusetts. 



Isoetes gravesii A. A. Eaton, Fernwort Papers 11. 1900. 



Cdnnecticut: Goshen (Undenvood); Lyme {Graves). 



Isoetes engelmanni A. Br. Flora 29 : 178. 1816. 



Elaine to Delaware and Pennsylvania. Also in Illinois and ^Missouri. 



Isoetes engelmanni caroliniana A. A. Eaton. Fern Bull. 8 : 60. 1900. 



Several localities in North Carolina. 



Isoetes engelmanni valida Engelm. in A. Gray, Manual ed. 5. 677. 1867. 

 Warriors Mark, Cornwall, and Sniithville, Pennsylvania (Porter); Wilmington,. 

 Delaware {C'anhg); Salt Pond Mountain, Virginia {Canhy); Great Falls, 

 3Iaryland {^yard). 



Isoetes engelmanni georgiana Engelm. Trans. St. Louis Acad. Sci. 4 : 381. 



1882. 

 Georgia: Floyd County {Canhg); Whittield County {Harper). 



