FERGUSON: CONTRIBUTIONS TO FLORA OF LONG ISLAND 179 
Deep Pond and Long Pond, Wad- 
ing River. 
All four stations in the pine bar- 
rens. 
The beak of mature achenes is horizontal or somewhat 
inclined, not vertical as described and figured in Gray’s Manual, 
Britton & Brown’s “Illustrated Flora’? and J. G. Smith’s 
“North American Species of Sagittaria and Lophotocarpus.”’ 
The writer’s determinations were kindly corroborated by Mr. 
Bayard Long who describes them as typical but observes that 
the beak is more or less oblique. Professor M. L. Fernald has 
also examined them and pronounces them typical; as the same 
as twenty-four collections from Massachusetts, all with hori- 
zontal beaks. 
Sagitiaria Engelmanniana J. Pine barrens, shores of ponds and 
G. Smith swamps. 
Ronkonkoma. 
Central Islip. 
Wading River. 
Manorville, 4 stations. 
Leaves varying from phyllodia 
to linear, to sagittate with 
narrowly linear to ovate parts. 
Extremely variable. The writer’s 
identification has been kindly 
verified by Dr. Witmer Stone, 
Mr. Bayard Long, and Mr. E. 
P. Bicknell. 
This species has been so puzzling to the writer that it seems 
worth while to review his experience. Britton & Brown's 
“Tllustrated Flora,’”? Gray’s Manual, J. G. Smith’s ‘ North 
American Species of Sagittaria and Lophotocarpus 1894”’ all 
separate Sagitraria Engelmanniana J. G. Smith from Sagitraria 
longirostra (Micheli), J. G. Smith principally by leaf form, de- 
scribing and figuring the former with sagittate leaves with 
linear parts, and the latter with sagittate leaves with ovate 
parts, although Smith in his monograph in general introductory 
remarks calls attention to the unreliability of leaf form as a means 
of separating species unless co-related with other more important 
