Skagway, Alaska; Lake Marsh and Mile's Canon, Yukon. (Williams.)

1195. H. Bestii, Ren. & Bryhn.

This plant is described as a subspecies of molle by Renauld and Bryhn, but I think it will stand as a distinct species. It differs from molle in having no central strand. It is a larger species also with stems below wiry and harsh with the bases of the broken-off leaves.

Skagway, Alaska. (Williams.)

900. H. dilatatum, Wils.

H. alpinum, Schimp. Lake Lindeman, Yukon. (Williams.)

903. H. polare, Lindb.

Growing along the wet shore of Lake Lindeman, Yukon. (Williams.)

908. H. alpestre, Swartz.

Skagway, Alaska; also Lake Lindeman, Yukon. (Williams.)

910. H. pseudo-montanum, Kindb.

Port Etches, Alaska, Lat. 60° 30', June 13th. 1892. (J. M. Macoun.)

911. H. eugyrium, Schimp.

On wet rocks, Hunter's Home, Queen's Co., New Brunswick, 1892. (J. Moser.) On stones in brooks, Big Intervale, Margaree, Cape Breton Island, N.S., July 20th, 1890. (Macoun.)

912. H. ochraceum, Turner.

On rocks, Skeena River, B.C., May 13th, 1892. (J. M. Macoun.) Very abundant on stones in brooks in all parts of Cape Breton Island, N.S., 1898; on stones in a brook, Woodstock, N.B., July, 1899. (Macoun.) On rocks in bed of stream at Dawson, Yukon.

(Williams.)

913. H. stramineuni, Dicks.

Fort Chimo, Ungava Bay, Labrador, Aug., 1896. (A. P. Low.) On earth in wet places, Baddeck, Cape Breton Island, N.S., 1898; on earth in a bog, Cāche Lake, Algonquin Park, Ont., 1900. (Macoun.) Lake Lindeman, Yukon. (Williams.)

915. H. turgescens, (Jensen.) Schimp.

In a dried up swamp just below the White Horse Rapids,Yukon. Growing in broad depressed mats. (Williams.)

Var. uliginosum, Lindb.

In swamps, with the preceding. This variety has elongated stems, and distant, more or less spreading leaves. (Williams)

916. H. scorpioides, Linn.

Just above Lake Lindeman in blackish mats almost covering the bottom of a small pond, 12 or 15 inches below the surface. (Williams.)

Var. gracilescens, Sanio.

In a dried up swamp a few miles below White Horse Rapids, Yukon, covering extensive areas with a mat up to 18 cm. thick. (Williams.)

917. H. badium, Hartm.

On the margin of a pond just below snowbanks about 1000 feet above Lake Lindeman, Yukon; also at Dawson on wet shady banks. (Williams.)