496 PROCEEDINGS OF THE AMERICAN ACADEMY. 
to Bear Lake, Mackenzie & Britisn Cotumsta, south to MAINE, 
Vermont, central and western New York, and Uran. The Scandi- 
navian material examined has been referred to the true C. aguatilis by 
Andersson, Fries, Laestadius, and Wickstrém, and it agrees well with 
Lange’s representation of the plant in Flora Danica, Supplement, t. 33. 
This is the plant of broadest range in America. Many extreme varia- 
tions have been described by European authors. The identity of these 
is too often obscure, but some of the forms recognized by Mr. Arthur 
Bennett in Great Britain (Jour. Bot. xxxv. 248) are found to occur 
also in America. As extreme variations these plants may well be dis- 
tinguished, though many transitional specimens occur which render 
their ready separation difficult. The best marked forms are the 
following: 
Var. eLatior, Bab. Man. Brit. Bot. 341; Bennett, 1. c. 249. — Ro- 
bust, 0.9 to 1.5 m. high: leaves 5 to 8 mm. broad: pistillate spikelets 
stout and heavy, 3.5 to 8 em. long, 5 to 8 mm. thick : scales dark, blunt 
or acuminate, about equalling or slightly exceeding the perigynia. — 
Maine, Fort Fairfield and Orono (4. LZ. Fernald, nos. 136, in part, 
395): New York, Pen Yan & Junius (Sartwell) ; Dexter (G. Vasey); 
Jefferson Co. (Crawe); Niagara Falls (W. Boott): Onto (Sullivant): 
_ Micniean, Péche Isle, Detroit River (0. F. Wheeler): MANITOBA, 
English River (Sir John Richardson).1 I have been unable to see 
authentic specimens of Babington’s plant, but from his description and 
the note of Mr. Bennett, it seems probable that our large form should 
be referred there. The material from Orono (where the once abundant 
plant has been exterminated by the “improvement ”’ of the meadow) 
has been described as a hybrid, C. aquatilis X stricta, Bailey, Bot- Gaz. 
xvii. 153; but there was little besides the local .occurrence of the plant 
to suggest hybrid origin. The same very large form is shown in Crawe’s 
New York material, as well as in Richardson’s English River plant, and 
it is closely matched by Boott’s plate 542, drawn from New York 
specimens. 
* Richardson’s plant probably came from the river rising in Lake Sal and 
flowing into Lake Winnipeg from the southeast. The name English River has 
been applied to a district between the Saskatchewan and Athabasca Lake, and it 
: » however, was consistently spoken of by Rich- 
eset ~ ropes rehing Expedition (1852), p. 62, &c., as Missinippi oT 
Chaurchi iver, while to the more southern river flowi ’ ES ua op 
_ plied the name English River (p, 362). eee trom Lake Ss 
