359 
Peru (Matthews, 3120, according to Meisner). 
27. POLYGONUM FERRUGINEUM, Weddell, Ann. Sc. Nat. 3d ser. 
xili. 252 (1849). 
LP. spectabile, Mart. ex Meisn. FI. Bras. v. 1 3, t. 3 (1855). 
P. gummiferum, Weddell, loc. cit.' (1849) ? 
P. glabrum, C. and S. Linnza, iii. 46 (1828)?. 
Eastern Brazil: Pernambuco (Gardner, 1124), and Havana, 
Cuba (according to Meisner). 
Var. INCANUM (Meisn.) 
P. spectabile, Mart. var. incanum, Meisn., in Mart. Fl. Bras. 
v. 13 (1855). 
Northern Brazil: Para (Spruce, 640). 
28. POLYGONUM AMPHIBIUM, L. Sp. Pl. 361 (1753). 
P. coccineum, Muhl. Cat. 40 (1813). 
Ontario: Wingham (Morton); Quebec: Tadousac (Nor- 
throp); New Hampshire: Squam Lake (Schrenk) ; Mass.: 
Ipswich (Oakes); New York: Onondaga Lake (Underwood) ; 
Rockland Lake (Morong); Eagle Lake (Miss E. G. Knight); 
New Jersey: Morris Pond (Britton); Kentucky (Short); Rocky 
Mountains: Pass Creek to Bridges Pass (Englemann) ; Nevada: 
Ruby Valley (Watson); California: San Jacinto Mountains (Par- 
ish). 
29. POLYGONUM EMERSUM (Michx.) Britton, Trans. N. Y. Acad. 
Sci. viii. 73 (1889). 
P. amphibium, L. var. emersum, Michx. Fl. Bor. Am. 1. 240 
(1803). 
P. amphibium, L. var. Muhlenbergii, Meisn. in D.C. Prodr. 
Xiv. 116 (1856). 
P. Muhlenbergii, S. Wats. Proc. Amer. Acad. xiv. 295 (1879). 
New York: Yates County (Gray); Staten Island: Garret- 
sons (Britton); New Jersey: Morris Co., Budd’s Lake (Porter); 
Pennsylvania : Lehigh County (Moser) ; Luzerne County, Long 
Pond (Small and Heller); Dauphin County along Susquehanna 
river (Small); Virginia: Giles County (Britton) ; Michigan: Fort 
Gratiot (Pitcher) ; Minnesota : Fort Snelling (Mearns) ; Nebraska : 
Scott’s Bluff County (Rydberg) ; Louisiana: Alexandria (Hale) ; 
Texas: Tom Greene County (Tweedy); New Mexico (Wright, 
1779); Arizona: Mogollon Mountains (Mearns); Colorado: Un- 
