Potamogeton heterophyllus Schreb.

NEW YORK BOTANICAL GARDEN
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PLANTAE EXSICCATAE GRAYANAE
1307. Potamogeton gramineus L.
Sp. PI. 127 (1758); Graebn. in Engler, Pflanzenr. iv.
Fam. 11, 84 (l907); HagstrSm in Sv. Vet. Akad. Handl.
lv. no. 5, 204, fig. 102 A-E (1916); Ogden in Rhodora,
xlv. 143, t. 746, fig. 36-88, map 10(l943), as var. typicus.
Syn. P. Proteus heterophyllus C. & S. in Linnaea, ii. 202,
t. 5, fig. 16c, f, g, h (1827). P. gramineus var. graminifolius
Fries, Novit. FI. Suecicae, 86 (1828) et am. auctt. seq.
P. heterophyllus sensu Morong in Mem. Torr. Bot. Club,
Hi no. 2, 28 (l898); Taylor in N. Am. FI. xvii. 19 (l909),
non Schreb. P. heterophyllus forma graminifolius (Fries)
Morong in Mem. Torr. Bot. Club, iii. no. 2, 24 (l898).
P. heterophyllus forma longipedunculatus Morong, I.e. P.
gramineus var. longepedunculatus (Morong) Graebn. in Eng-
ler, Pflanzenr. iv. Fam. 11, 88 (1907). P. heterophyllus
forma terrestris sensu Robinson & Femald in Gray, Man.
ed. 7, 74 (1908). P. gramineus forma longipedunculatus
House in Bull. N.Y. State Mus. ccliv. 58 (1924) in part.
Shallow pool in shore sand about 10 meters from Lake
Michigan, St. Ignace, Mackinac County, Michigan.
Coll. E. C. Ogden, Edith M. Bolan (no. 1688)
August 2, 1987
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