(2430.) P. Pennsylvanicus, Cham.; Gray, Man., ed. VI., 559.

P. Claytonii, Tuckerman; Macoun, Cat. IV., 82.

In the Kaministiquia River near Fort William, Lake Superior. 1889. (Dr. Britton.) Riviere des Aulnais, Q. (St. Cyr.)

(2434.) P. alpinus, Balbis (1804); Bennett, Letter, March 3, 1890.

P. rufescens, Schrad. (1815); Macoun, Cat. IV., 83.

"The specimens from 'Ounalashka,' (Herb., Berlin) were named P. microstachys, Wolfgang in Roem. & Schultze, Veg. Sys., Mant. 3, p. 360 (1827); but the specimens are only a var. (?) or form of P. rufescens, Schrad. This name, P. rufescens, will probably have to give way. There are three, certainly, if not more, prior names; but it is not settled yet which is the earliest. I have a Greenland specimen of P. rufescens." (Bennett, 1888.) Anstey's Creek, Shuswap Lake; and Bonaparte River, B.C. (J. M. Macoun.) Griffin Lake, Gold Range, B.C., 1889. (Macoun.)

(2435.) P, fluitans, Roth.; Gray, Man., ed. VI., 560.

P. lonchites, Tuck.; Macoun, Cat. IV., 83.

Mr. Morong considers this P. lonchites or var. Americanus of that species; but Mr. Bennett, of Croydon, thinks it is P. pumilus, Wolfgang. This would date from 1827. Roem. et Schultze, Sys. Veg. Mant. 3.

A plant provisionally referred here is spoken of by Mr. Bennett, as below: -

"Your plant (No. 21) is like a specimen from Silesia, in Prussia, named ' P. nutans var. proliocus, Koch, = P. serotinus, Shrad., but your plant has the leaves narrower, and larger, and the stipules shorter, and must be studied and described later. A further examination of your specimens shows them to be much like a plant in Wallich's herb, from India, named c P. didymus, Wall., Napalia, 1821;' but there is no fruit on his specimen. This, anyhow, seems to fall under P. fluitans as an aggregate species. After a good deal of comparing with all the nutans group, I can come to no other remit than that this (No. 21) is a form of P. lonchites, Tuckerman. The only actual difference is the shining lower leaves, but this and its peculiar yellow-brown colour may be produced by some local influence? But the stipules of your plant at once remove it from any form of P. lucens (P. longifolius, Gaudichaudi, etc.) Is the difference enough to call it a form?" (Bennett, Letter, March 3rd, 1890.)

(2437.) P. heterophyllus, Schreb.; Gray, Man. VI, 561.

P. gramineus and var. heterophyllus, Macoun, Cat. IV., 84.

Both Mr. Bennett and Mr. Morong combine these, and prefer Schreber's name, as it is specific and well understood.

(2439.) P. Zizii, Roth, (not Mertens & Koch.)

Mr. Bennett writes that Mertens & Koch published this as a variety, not as a species. Roth was the first to do this. It is not improbable that it has a prior name: P. angustifolia, Presl. Rather common in Griffin Lake, Gold Range, B.C. 1889. (Macoun.)

Var. Methyensis, Bennett, MS.

Methy Lake, near Methy Portage, Lat. 57°, 1888. (J. M. Macoun.)

(2441.) P. perfoliatus, Linn., var. Richardsonii, Bennett, MS.

P. perfoliatus, Linn., var. lanceolatus, Bobbins; Macoun, Cat. IV., 85.

"Dr. Robbins published this name in Gray, Man., ed. V., 488; but it is pre-occupied by Blytt in Norges Flora, 1861, for a Norwegian var., which is not the same as Robbins' plant! [Le Grand, a French author, has since (1887) published a var. lanceolatus, a French form of P. perfoliatus.] I prefer the name var. Richardsonii for the American P. lanceolatus, after Dr. Richardson, who seems to have been the first to collect it. (Glasgow Herb.) British-American 'Franklin Expedition'." (Bennett.) Methy Lake and River, Lat. 57°, 1888; Anstey's Creek, Shuswap Lake, B.C. 1889. (J M. Macoun.) In a pond on the Reservation at Kamloops, B.C. 1889. (Macoun.)

(2443.) P. obtusifolius, Mertens & Koch; Macoun, Cat. IV., 86. Methy River, Lat. 57°, 1888. (J. M. Macoun.)

(2415.) P. pusillus, Linn., var. elongatus, "Bennett, MS , 1890.

"A form of P. pusillus, that so far as I know has received no name. In my herbarium I have marked it ' P. jmsillus, var. elongata, mihi.' I have specimens from Hungary that are very near these from B.C. It has some of the faces of P. rutilus, Wolf.; but that has much sharper leaves, with long stipules and rigid stems. There is no fruit, but the sepals (perianth segments) are large and long-hafted. I find, on referring to my notes, that exactly similar specimens to yours are in the British Mus. Herb., named ' P. rutilus, Wolf.' It certainly does bear a resemblance to a specimen I have named P. coespitosus, Notte! (leg. Notte 7; =P. rutilus, Wolf.!) but the likeness is only superficial." (Bennett, Letter, March 3rd, 1890.) Spallumsheen River, at and above Enderby, B.C., July 10th, 1889. (J. M .Macoun.)

(2446.) P. mucronatus, Schrad.; Macoun, Cat. IV., 88.

"I name this now P. Friesii, Ruprecht in Bert. d. Russ. Reiches, 1845. There is good reason to think that Schrader's plant was the var. acuminatus, Schun. of P. lucens. This was (Herb. Glasgow) gathered by the Franklin Expedition." (Bennett.) Winter River, and Sea Cow Pond, Prince Edward Island, 1888. (Macoun.) Spallumsheen River, at Enderby, B.C. (J. M. Macoun.)

(2447.) For P. rutilans, Wolfgang; Macoun, Cat. IV., 88, read P. rutilus, Wolgang in Roem. & Schultze, Veg. Sys. Mant. 3, p. 362 (1827.) " It is the P. caespitosus of Nolte." (Bennett.)

(3189.) P. vaginatus, Turcz., Flora baiclensi-dahurica, 1856. (Siberia.)

"This plant, placed under P. pectinatus, in Ledebour's Flora Rossica, vol. 4, is stated by Dr. Kihlman (of Helsingfors) in Botanisha Notisea, 1887, page 85, to have been brought from "Saskatchewan, Canada, Bourgeau, Palliser's Exp., 1858." (Bennett.) Buffalo Lake, N.W.T.,

Lat. 56°, 1888. (J. M. Macoun.)

(3190.) P. flabellata, Babington.

Mr. Bennett sent a specimen of this to Mr. Babington, who names it as above. It belongs to the same group as P. pectinatus. North Pond, near East Point, Prince Edward Island, 1888. (Macoun.) u (No. 11) P. pectinatus, Linn., var.pseudo-marinus, Bennett, = P.pectinatus, Linn., forma salina, Voch! (It really comes under P. flabellata, Bab., as a variety, but without fruit, it is impossible to say so.)" (Bennett, Letter, 1890.) In a saline pond north of Kamloops, B.C., June 13th,

1889. (Macoun.)

(2449.) P. pectinatus, Linn.; Macoun, Cat. IV., 88.

"Judging by the young fruit this (No. 12) must go to P. pectinatus, Linn., as an aggregate. It comes close to the var. Imgissimus, Mortens & Koch (1823), which was issued in the Flora Lugricae, 1860; as the var. longissimus, Weissmann Fl. Petrop." (Bennett Letter, March 3rd, 1890.) Pond on the Indian Reservation at Kamloops, B.C., June 26th, 1829. (Macoun.)