(2418.) S. variabilis, Engelm.; Gray, Man. Ed. Ed. V., 4937

S. sagittifolia, Pursh, Fl. II., 395; Hook., Fl. II., 167. Under its various forms this species extends across the continent though it is apparently quite rare, if present at all, in British Columbia. It seems to be common in all the eastern provinces, but has not been separated into varieties, and hence no special reference can be made to them. Our specimens show the following varieties: -

Var. obtusa, Engelm.; Gray, Man. Ed. V., 493.

S. obtusa, Willd.; Pursh, Fl. II., 396. Leaves large and obtuse, flowers dioecious. Abundant in water in the Bay of Quinte, at Belleville, Ont. (Macoun.) Oba Lake, Ont. (R. Bell.) Vicinity of Ottawa, Ont. (Ami.)

Var. latifolia, Engelm.; Gray, Man. Ed. V., 493.

S. latifolia, Willd.; Pursh, Fl. II., 396.

S. sagittifolia, var. macrophylla, Hook., Fl. II., 167.

S. sagittifolia, Michx. Fl. II., 189.

Campbellton, N.B. (Chalmers.) In lakes and rivers, not uncommon, Hastings Co., Ont. (Macoun.) North-west coast, where it is called "Wapatoo," and where the roots are eaten by the Chinooks. (Hooker, Fl.)

Var. hastata, Engelm.; Gray, Man. Ed. V., 493.

S. sagittifolia, var. 3, angustifolia, Hook. Fl. II., 167, in part. S. hastata, Pursh, Fl. II., 396.

This variety includes all the larger forms with acute and sagittate leaves, and may be called the common variety throughout the country. There are three forms of it well represented in our herbarium.

(a.) Has large very elongated leaves, with very acute and divaricate lobes, flowers dioecious. Nation River, at Casselman, near Ottawa, and in Brigham's Creek, near Hull, Q. (Macoun.) London, Ont. (Burgess.) River St. Charles, Q. (St Cyr.)

(b.) This form is easily distinguished from (a), by its much smaller and shorter leaves, abruptly acute or almost obtuse point, and short very acute less divaricate lobes. Muskeg Island, Lake Winnipeg. (J. M. Macoun.) In small streams, near the Hand Hills, Alberta, (Macoun.) South Antler Creek, Assiniboia. (Burgess.)

(c.) This is a shallow water form with small hastate leaves, scarcely divergent, and very short lobes and always monoecious flowers. Grand Vallée, Gaspé, Q.; Bay of Quinte, at Belleville, Ont.; mouth of the Nipigon River, Lake Superior. (Macoun.) Missinaibi River, Ont. (R. Bell)

Var. diversifolia, Engelm.; Gray, Man. Ed. V., 393.

Some leaves of this form are lanceolate and others are sagittate. Moose Mountain Creek, Man. (J. M. Macoun.) Ponds in the Eagle Hills, near Battleford, N.W.T. (Macoun.)

Var. angustifolia, Engelm.; Gray, Man. Ed. V., 393.

The very long, narrow and divergent lobes of the narrow leaves characterize this form Marshes near Cape Blomidon, N.S.; Nation River, at Casselman, near Ottawa, and in the Bay of Quinte, at Belleville, Ont. (Macoun.) In shallow water at Port Dover, Ont. (Millman.) London, and Port Cockburn, Muskoka Co., Ont. (Burgess.)

Var. gracilis, Engelm.; Gray, Man. Ed. V., 393.

S. sagittifolia, var. angustifolia, Hook., Fl. II., 167, in part. S. gracilis, Pursh, Fl. II., 396.

River St. Pierre, near Montreal, 1821. (Dr. Holmes.) River St. Charles, Quebec. (St. Cyr.) Ponds in the Eagle Hills, near Battle-ford, N.W.T. (Macoun.)

Var. pubescens, Engelm.; Gray, Man. Ed. V., 393. Leaves pubescent as well as the upper part of the petiole and scape. Bay of Quinte, at Belleville, Ont. (Macoun.)

(2419.) S. calycina, Engelm. Var. spongiosa, Engelm.; Gray, Man. Ed. V., 393.

Near the head of the tide in Richibucto River and at Rothesay; also Tobique River, N.B. (Fowler, Cat.)

(2420.) S. heterophylla, Pursh, Fl. II., 396.

S. sagittifolia, var. 3, angustifolia, Hook., Fl. II., 167, in part.

Apparently rare eastward but not uncommon in waters bordering on the St. Lawrence and Great Lakes. Abundant in numerous places around Ottawa. (Fletcher, Fl. Ott.) Not uncommon in the Bay of Quinte, at Belleville, and at Weller's Bay, Lake Ontario. (Macoun.)

Var. rigida, Engelm.; Gray, Man. Ed. V., 394.

S. rigida, Pursh, Fl II, 397; Hook., Fl. II., 397.

Apparently the deep water form of the Great Lakes. West Lake and Consecon Lake, Prince Edward Co., Ont. (Macoun.) Wet sandy shore at Belleville, Ont. (Burgess.)

(2421.) S. graminea, Michx., Fl. II., 190; Pursh, Fl. IL, 397.

S. sagittifolia, var. 4, simplex, Hook., Fl. II., 167, in part. This seems to be a northern and eastern species. Newfoundland. (Miss Brenton.) Small lake near North Sydney, Cape Breton Island. (Macoun.) In water at Rothesay, and in a small lake near Richibucto; Grand Lake, and Upper St. John, and Clifton, N.B. (Fowler, Cat.) Gull River, Victoria Co., Ont. (Macoun.) Wet sandy shore of Lake Joseph, Port Cockburn, Muskoka Co., Ont. (Burgess.)