(2467.) H. ovata, R. Br.; Gray, Man., ed. VI., 574.

H. obtusa, Schultes; Macoun, Cat. IV., 95. Not uncommon in British Columbia. Agassiz. 1889. (Macoun.)

(2468.) H. palustris, Linn., var. Watsoni, Clarke, Journ. Bot., XXV., 268.

(1887.)

Stated by Mr. Clarke to occur in Newfoundland, Labrador, and subarctic America, and to be a very trifling depauperate form or variety with castaneus spike. (Britton.) Hudson Bay. (Burke, fide Britton.) In wet sand, Brackley Point, Prince Edward Inland. 1888. (Macoun.)

Var. vigens, Bailey in Herb. Gray.

"Culm stout, thick, very spongy, constricted at the summit, nearly as thick as the ovate spike." (Britton.) In muddy places by ponds, Victoria Road and Mount Stewart, Prince Edward Island. 1888. In a pond on the road to Cedar Hill about one mile from Victoria, Vancouver Island. 1887. (Macoun.)

(2469.) H. acuminata (Muhl.):Nees.; Britton, Journ. N. York, Micros. Soc, X., 109.

H. compressa, Sulliv.; Macoun, Cat. IV., 96.

Specimens referred to H. tenuis (in Part IV., 97) from Salt Lake, Anticosti; east coast of Lake Nepigon; Lake Superior at Thunder Bay; marsh, Porcupine Mountains. Man.; and Moose Jaw Creek, Assiniboia, belong here.

(2471.) H. intermedia, Schultes.; Macoun, Cat. IV., 96.

In mud along the shore of Leamy's Lake, near its outlet at Hull Cemetery, near Ottawa. 1889. (Macoun.)