(3020.) O. sensibilis, Linn., Sp. PL, 1517. Michx., Fl. Bor. - Am., ii., 272. Swartz, Syn. Fil., 110. Pursh, Fl. Am., Septr, ii., 665. Hook., fl. Bor. - Am., ii., 262. Provancher, Fl. Can., 717. Lawson, Can. Nat., i., 274. Watt, Can. Nat., iv., 363. Macoun & Burgess, Trans. Roy. Soc. Can., ii., sect. iv., 215.

A very common fern throughout Canada, in wet, generally shaded, places, as for west as the head of Lake Winnipegoosis and the Saskatchewan.

The plant described as var. obtusilobata by Doctor Torrey in the Flora of New York, vol. ii., p. 499 (Onoclea obtusilobata, Schk., Krypt. Gew., 95. Pursh, Fl. Am. Sept., ii., 665) is only a form in which some, or all, of the sterile fronds are contracted and partially fruitful. It is recorded from but few localities but is probably of much more frequent occurrence. Richibucto, N.B. (Fowler.) Havelock, King's Co., N.B. (Brittain.) Prince Edward Island. (Bain.) Wet meadow, one mile north of Murray Town-Hall, Northumberland Co., Ont. (Macoun.) Ottawa, Ont. (Fletcher.) Saugeen, Ont. (P. J. Scott.)

(3021.) O. Struthiopteris, Hoff., Fl. Deutschld., 11. Swartz, Syn. Fil., 111. Watt, Can. Nat., iv., 363.

Macoun & Burgess, Trans. Roy. Soc. Can., ii., sect. iv., 216.

0. nodulosa, Schk., Krypt. Gew., 97. (Perhaps also of Michx., Fl. Bor. - Am., ii., 272.)

Struthiopteris Germanica, Willd., Enum., 1071. Hook., Fl. Bor. - Am., ii., 262. Gray, Man., ed. v., 667. Provancher, Fl. Can., 717.

Struthiopteris Pennsylvania, Willd., Sp. PL, v., 289. Pursh, Fl. Am. Sept., ii. 666.

Struthiopteris Germanica, var. Pennsylvanica, Lawson, Can. Nat.i., 273; Fern Fl. Can., 231.

A tall, showy species, found in low, open or wooded, especially alluvial, ground. Its range is from Nova Scotia to near the Pacific Coast in the valley of the Fraser River in British Columbia, but it is most common east of Lake Huron. Canada to the Saskatchewan. (Richardson.). About forty miles north of Michipicotin on the Magpie River, and about five miles up the Kaministiquia River, Lake Superior, Ont.; along the Assiniboine River, from Winnipeg to the Souris River, Man.; common along the C. P. Ry., east of Agassiz Station, and along Eagle River in the Gold Range, B.C., 1889. (Macoun.) North-west Angle, Lake of the Woods. (Buroess.)