Potamogeton richardsonii (A.Benn.) Rydb.

PLANTAE EXSICCATAE GRAYANAE
Herbarium of the University of Alabama
Potamogeton richardsonii (Bennett) Rydberg
det. Robert R. Haynes	1979
1403. Potamogeton Richardsonii (A. Bennett) Rvdb.
In Bull. Torr. Bot. Cl. xxxii. 599 (l905); Hagstrôm in
Kungl. Sv. Vetenskap. Handl. lv (5). 253 (l916) ; Ogden
in Rhodora, xlv. 162, t. 746, figs. 41-46, map 15 (l943);
Raupin Sargentía, vi. 108 (1947); Fernald, Gray’s Man.
(ed. 8) 79 (l950); Scoggan, FI. Bic. & Gaspé, 77 (l950).
Syn. Potamogeton perfoliatus var. Richardsonii A.Bennett
in Journ. Bot. xxvii. 25 (l889); Morong in Mem. Torr.
Bot. Cl. iii (2). 33 (1893); Graebner in Engler. Pflanzenr.
IV, xi. 95 (1907). Spirillus perfoliatus var. Richardsonii (A.
Bennett) Nieuwl. in Am. Midi. Nat. iii. 17 (l913). Pota-
mogeton perfoliatussubsp. Richardsonii (A.Bennett) Hultén,
FI. Alaska & Yukon, i. 102 (l94l). Potamogeton perfoliatus
var. lanceolatus Robbins in Gray, Man. (ed. 5) 488 (1867),
non Blytt (l86l).
Rapid deep waters òf the Rivière du Nord.
Saint Jérôme, Terrebonne County, Québec, Canada.
Coll. Bro. Rolland-Germain	August 2, 1946
03716171