(2693.) P. agrostoides, Spreng.; Torr., Fl. N. York II., 429.

P. elongaium, Pursh, Fl. I., 69.

Common in clumps along Sproat Lake, six miles from Alberni, west coast of Vancouver Island, 1887. (Macoun.) Although collected in August, the specimens are not more than half grown. There is no doubt of it being indigenous, as there are no settlements where it was found

(2694.) P. capillare, Linn.; Michx., Fl. I., 47; Pursh, Fl. I., 67; Hook., Fl. II., 236.

Abundant in cultivated fields and waste places. Truro, and Windsor, N.S. (Macoun.) A weed in gardens and cultivated grounds, N.B. (Fowler, Cat.) Lobster Bay, and St. Charles River, Q. (St. Cyr.) Vicinity of Ottawa. (Fletcher, Fl. Ott.) Common at Prescott, Ont. (Billings.) Abundant throughout central Ontario, and westward to Port Arthur, Lake Superior. (Macoun.) Vicinity of Hamilton, Ont. (Logie.) Fields at London, and Toronto. (Burgess.) Waste places, Kingston, Ont. (Millman.) Wash )w Bay, Lake Winnipeg. (J. M. Macoun.) Quite common along streams throughout the prairie region; observed only at Stamp River Falls, near Sproat Lake, Alberni, Vancouver Island. (Macoun.) Victoria, Vancouver Island. (Fletcher.) Lytton, B.C. (Hill.) Saskatchewan. (Hooker, Fl.)

(2695.) P. Crus-galli, Linn.; Michx., Fl. I., 46; Pursh, Fl. I., 66; Macoun, Cat. So. 2258.

Oplismenus Crus-Galli, Kunth; Hook., Fl. II., 236. Usually along ditches and about barns in cultivated ground. Pictou, N.S. (Macoun. McKay.) A very variable and troublesome weed about barnyards and gardens, N.B. (Fowler, Cat.) St. Charles River, Quebec city. (St. Cyr.) Vicinity of Ottawa. (Fletcher, Fl. Ott.) Very common around Prescott, Ont. (Billings.) Abundant in barnyards and ditches in the settled parts of Ontario, westward to Owen Sound. (Macoun.) Vicinity of Hamilton, Ont. (Logie.) Abundant around London, Ont. (Burgess. Millman.) West Rideau Lake, Ont. (Porter.)

Var. hispidum, Ell. Sk. I., 114.

P. muricatum, Michx., Fl. I., 47. (?)

P. Walteri, Pursh, Fl. I., 66.

Oplismenus muricatus, Kunth; Hook., Fl. II, 236. Rather uncommon but apparently indigenous. Along the Nation Eiver, at Casselman. (Fletcher, Fl. Ott.) In alluvium along the Salmon River, above Shannonville, Hastings Co., Ont. (Macoun.) Point Edward, River St. Clair, Ont. (J. M. Macoun.) Vicinity of Hamilton, Ont. (Logie.) Distinguished chiefly from the species by the very hispid sheaths of the leaves.

(2696.) P. depauperatum, Muhl. Gram. 112.

P. rectum, Roem. & Schultz.; Hook., Fl. II., 235. P. involutum, Torr., Fl. I., 147. Dry sandy or rocky ground; rather rare. Newfoundland. (Reeks.) Sandy woodlands, Kingston, N.S. (Macoun.) Vicinity of Ottawa; rare.

{Fletcher, Fl. Ott.) Huckleberry Rapids, Argenteuil Co., Q. (D' Urban.) Grand Trunk gravel pit, near Prescott, Ont. (Billings.) Very abun. dant on Laurentian rocks, at Shannonville, and on the bank of the Trent, above the railway bridge, near Trenton, Hastings Co., Ont.; dry places at Owen Sound; up the Kaministiqua, near Kakabeka Falls, and on Pie Island, Lake Superior. (Macoun.) Vicinity of London, Ont. (Burgess. Millman.) Dry banks, Hamilton, Ont. (Logie.) Plains of the Saskatchewan. (Hooker, Fl.)

(2697.) P. dichotomum, Linn.; Pursh, Fl. I., 67.

Bather common in dry or damp thickets and meadows. The typical form is the P. nodiflorum, Lam., and is chiefly found in meadows and on rocks. Newfoundland. (Reeks.) Common at Bedford, N.S. (Macoun.) Glenelg, Guysboro Co., N.S. (Faribault.) In dry fields and woods, Kent Co., N.B. (Fowler, Cat.) Quebec. (St. Cyr.) Banks of the Riviere Rouge, Argenteuil Co., Q. (D' Urban.) Tadousac, Q. (A. T. Drum-mond.) Vicinity of Ottawa; common. (Fletcher, Fl. Ott.) Thickets near Prescott, Ont. (Billings.) Abundant on dry sandy soil throughout Ontario, extending westward to Owen Sound, and north-west to Sault Ste. Marie, and around Lake Superior to Thunder Bay. (Macoun.) Port Colborne, Ont. (McGill Coll. Herb.) Vicinity of Hamilton, Ont. (Logic) London, Windsor, and Point Pelée, Lake Erie. (Burgess.) Rupert River, N.E.T.; Medicine Hat, Alberta. (J. M. Macoun.)

Var. nitidum, Lam.; Gray, Man. Ed. V., 649.

P. nitidum, Lam.; Michx., Fl. I., 47; Pursh, Fl. I., 67; Hook., Fl. II., 235.

This is the smooth unbranched form most frequently met with in thickets. St. James, N.B. (Vroom.) Sandy woods, near Belleville, and Owen Sound, Ont. (Macoun.) Throughout Canada to the Saskatchewan. (Hooker, Fl.)

Var. pubescens, Gray, Man. Ed, V., 649.

P.pubescens, Lam.; Michx., Fl. I., 47; Pursh, Fl. I., 68. P. thermale, Boland. Proced. Calif. Acad. II., 181.

Leaves and sheaths pubescent. Sandy woods, Point Pelée, Lake Erie. (Burgess.) Valley of the Upper Columbia, B.C. (Dawson.) On the higher slopes of Mount Dawson, Roger's Pass, B.C. (Macoun.)

(2698.) P. glabrum, Gaud. Agrost. I., 22.

Digitaria glabra, Roem. & Schultz.; Torr. Fl. I., 154. D. Ischaemum, Schreb.; Muhl. Gram. 121.

Introduced chiefly along railways and waste ground about towns. Truro, and Pictou, N.S. (Macoun.) Fredericton, on the railway track;

Nash waaksis, Hampton, and Salmon River, N.B. (Fowler, Cat.) Point Levis, Q. (Macoun.) Vicinity of Ottawa. (Fletcher, Fl. Ott.) Kail-way track, two miles west of Prescott, Ont., and in a sandy field near that town. (Billings.) Waste places at Belleville, and Owen Sound; on the railway track at St. Thomas, Chatham, and Windsor, Ont. (Macoun.) Near Hamilton, Ont. (Logie.) Meadows, roadsides, and lawns, London, Ont. (Burgess. Millman.)

(2699.) P. latifolium, Linn.; Michx., Fl. I, 49; Pursh, Fl. I., 68; Hook., Fl. If., 235.

P. clandestinum, Hook., Fl. II., 235. Waste ground, Grand Trunk gravel pit, near Prescott, Ont. (Billings.) Rich rocky woods and thickets, common in Prince Edward, Hastings, and Northumberland Co's., Ont.; Grassy woods, Niagara Falls. (Macoun.) Vicinity of Hamilton, Ont. (Logie.) Sandy woodlands, near London. (Burgess. Millman.) Jones Falls, near Kingston, Ont. (Millman.) Quebec, and Ontario. (Hooker, Fl.)

(2700.) P. laxiflorum, Lam.; Pursh, Fl. I., 68.

Small specimens of this species have been sent from St. Stephen, N.B., by Mr. James Vroom. They are, although very small, identical with others received from Dr. Vasey, Botanist Agricultural Department, Washington.

(2701.) P. microcarpum, Muhl. var. sphaerocarpon, Vasey.

P. dichotomum, var. sphaerocarpum, Gray. In thickets on dry hillsides, near Windsor, N.S., 1883. (Macoun & Burgess.) All the various forms which have hitherto passed as P. dichotomum should be carefully examined and compared with authentic specimens as there is no doubt but we have more forms than are here recorded.

(2702.) P. pauciflorum, Ell.; Gray, Man. Ed. V., 648.

Open prairie, Emerson, Man. (Burgess. Millman.) Swampy prairie, Red River, Man. (Dawson.)

(2703.) P. sanguinale, Linn. Sp. Pi. I., 55.

Digitaria sanguinale, Michx., Fl. I. 45; Pursh, Fl. I., 69. Syntherisma praecox, Walt. Fl. Car. 76. Fields, roadsides, and railway tracks, sparingly introduced. Vicinity of Ottawa. (Fletcher, Fl. Ott.) Banks of the St. Lawrence, west of Prescott, Ont. (Billings.) Common at Queenston and Niagara. (Macoun.) Vicinity of Hamilton, Ont. (Logie.) Waste places at London, and Point Pelée, Ont. (Burgess.) Roadside, Port Dover, Ont. (Millman.)

(2704.) P. scoparium, Lam. Encycl. IV.

P. pauciflorum, Ell. (?); Gray, Man. Ed. V., 648. Sparingly collected on Point Pelée, Lake Erie. (Burgess.) Spence's Bridge, B.C. (Fletcher.) Abundant at Long Lake, near Departure Bay, shores of Shawnigan and Horne Lakes, and common at Alberni, on the west coast of Vancouver Island. (Macoun.)

(2705.) P. virgatum, Linn.; Michx., Fl. I., 352; Pursh, Fl. I., 67; Hook., Fl. II., 235.

Sandy shores of rivers and lakes. Sands of Presqu'ile Point, Lake Ontario; shores of Red and Chicken Bays, Lake Huron. (Macoun.) Port Colborne, Lake Erie. (McGill Coll. Herb.) Point aux Pins, Lake Erie. (Burgess.) Bed Deer River, north of Porcupine Mountain, Man.; sandhills, at the source of the Qu'Appelle River, Assiniboia. (Macoun.) Lake Huron, and Saskatchewan. (Hooker, Fl.) Red River, Man., 1826. (Douglas.)

(2706.) P. xanthophysum, Gray, Gram. & Cyp. I., 20; Hook., Fl. II., 235.

Rather rare in open, rocky, or sandy woods. Vicinity of Ottawa. (Fletcher, Fl. Ott.) Fields near the Grand Trunk gravel pit, Prescott, Ont. (Billings.) Dry thickets and meadows, east of Belleville; very common; also on Rice Lake Plains, and at Port Dover Junction, Ont. (Macoun.) Vicinity of Hamilton, Ont. (Logie.) Port Colborne, Lake Erie. (McGill Coll. Herb.) La Cloche, Trading Post, Georgian Bay. (R. Bell.) Sandy soil, twenty miles up the Kaministiqua, west of Lake Superior; not uncommon in thickets along the Assiniboine, as far west as Fort Ellice, Man. (Macoun.) Plains of the Saskatchewan, (Hooker, Fl.)