46 Rhodora [February 



Klinge, Arch. Naturf. Soc. Dorpat, ser. 2, viii.411 (1882). E. llelc- 

 ocharis, B. limosum, f. uliginosum Aschers. & Graebn. Syn. Mittel- 

 eur. Fl. i. 136 (189(5). F. fluviatile, var. idiginosum A. A. Eaton, 

 Fern Bull. x. 73 (1902). E. limosum, f. IAnnacana, subf. mtnor 

 Dalla Torre & Sarntheim, Fl. Tirol, vi. 74 (1906). E. limosum a. 

 Linnaeanum sub-var. minus Rouy, Fl. Fr. xiv. 500 (1913). — Maine: 

 springy places, Ft. Kent, June 15, 1898, Fcmald, no. 2191; gravelly 

 river-bank, Ft. Fairfield, July 7, 1893, Fcmald, no. 200; sandy 

 shores, Grand Isle, June 20, 1898, Fcmald, no. 2194; in an old well, 

 Orono, July 6, 1892, Fcmald; margin of river, Winn, July 10, 1916, 

 Fcmald tt- Long, no. 12,315. Vermont: shore of Winooski River, 

 alt. 270 ft., Essex Junction, 25 July, 1911, Blake, no. 2190. Massa- 

 chusetts: sandy pools, Amesbury, May 30, 1897, A. A. Eaton, 

 no. 47; June, 1902, A. A. Eaton, no. 48. Illinois: Chicago, A'. 

 /.. T. Xclson. Yukon: Dawson, June 19, 1914, Eastwood, no. 309. 

 Muhlenberg's E. uliginosum came from Pennsylvania and Braun 

 cites the form as collected in Newfoundland by La Pylaie. 



3. Forma verticillatum Doell, Fl. Baden, 64 (1857). E. fluvia- 

 tile L. Sp. PL 1002 (1753), excl. syn. Hall, and Bauhin. "Afart" 

 E. limosum fluviatile Hornem. Dansk Oeconomik Plantelaere, 345 

 (1837). E. limosum, formae brachj/cladon and Icptocladon Doell, 

 Rhein. Fl. 30 (1843). E. limosum 0. ramosum Gren. & Godr. Fl. 

 Fr. iii. (544 (1855). E. limosum, vars. verticillatum and attenuation 

 Milde, Gefaess-Crypt. Schlesiens, 448 (1858). E. llelcocharis, 2 

 fluviatile Klingc, Arch. Naturf. Soc. Dorpat, ser. 2, viii. 412 (1882). 

 E. limosum, "var. E. fluviatile" Baker, Handb. Fern Allies, 4 (1887). 

 E. llelcocharis, A. fluviatile Aschers. & Graebn. Syn. Mitteleur. Fl. 

 i. 135 (1896). E. fluviatile, var. verticillatum A. A. Eaton, Fern Bull. 

 x. 73 (1902). E. limosum, f. fluviatilis (with subformae bracln/clada, 

 leptoclada and attcnuata) Dalla Torre & Sarntheim, Fl. Tirol," vi. 74 

 (1006). — Newfoundland to the Yukon, so. to Delaware, Indiana, 

 Wisconsin, Nebraska, Idaho and Oregon. 



Although the earliest name in the formal category applied to this 

 plant is f. brachycladon Doell, we have felt justified in taking up the 

 earliest formal name applied to the group as we define it. F. brachy- 

 cladon applies only to a single, short-branched phase of our form, 

 hardly worth any recognition; the name, as indicating the contrast 

 between the branched and unbranehed forms, is so inappropriate as 

 to be misleading; and it and its companion Icptocladon were reduced 

 by Doell himself in his Fl. Baden to sub-forms under his f. verticillatum. 

 There seems no reason for upsetting his more mature and obviously 

 correct treatment, which has been accepted by practically all sub- 

 sequent authors. 



