1907] Fernald & Eames,— Lists of New England Plants,— XX 89 
4— + Strictly aquatic: leaf-blades reticulated beneath, opaque above. 
++ Fruits rather abruptly slender-beaked: leaf-blades 1.5-4 mm. broad: 
stigma rarely over 1.2 mm. long. 
S. ANGUSTIFOLIUM Michx. Slender aquatic: stems 3-12 dm. 
long: leaves exceedingly long and narrow, opaque: bracts com- 
paratively short, slightly dilated at base, the lowest 0.5-3 dm. long: 
inflorescence simple, at the surface of the water: pistillate heads 1 
to 3, sessile or peduncled (the lowest peduncle rarely 9 cm. long), 
in fruit 1.3-2 em. in diameter: fruits 1.5-2 mm. thick, drab, with 
reddish-brown bases.— Fl. ii. 189 (1803); Graebner in Engler, 
Pflanzenr. iv. no. 10, 16, in part (1900). S. simplex, var. angusti- 
jolium Engelm. in Gray, Man., ed. 5, 481, (1867). S. affine Macoun, 
Cat. Can. Pl. ii. 71 (1888), perhaps also of Schnitzlein, Nat. Pfl. 
Typh. 27 (1845).— Ponds and slow streams, Newfoundland to 
Alaska, south, especially among the mountains, to Connecticut, New 
York, Colorado and California; ascending in alpine ponds to an 
altitude of 1140 m. on Table-top Mountain, Gaspé, and to 3500 m. 
in Colorado. Perhaps also in Eurasia (S. affine Schnitzlein). 
++ ++ Fruits gradually acuminate: leaf-blades 4—9 mm. broad: stigma 1.5- 
2 mm. long. 
S. SIMPLEX Hudson. Coarser, and in our region strictly aquatic: 
stems 3-10 dm. long: bracts somewhat dilated at base, the lowest 
1-4 dm. long: inflorescence usually simple, elongated: pistillate 
heads 2 to 4, mostly supra-axillary, the lowermost long-peduncled, 
in fruit 2-2.5 cm. in diameter: fruit 1.5-2.5 mm. thick.— Fl. Angl. 
ed. 2, 401 (1778); Am. auth. in small.part only; Graebner in Engler, 
Pflanzenr. iv. no. 10, 16 (1900).— Newfoundland to British Colum- 
bia, south to Maine, northern Vermont, Lake Superior region, Colo- 
rado, Utah, and California; also Eurasia. 
Var. MULTIPEDUNCULATUM Morong. Heads aggregated, mostly 
pedunculate, subcorymbose.— Bull. Torr. Cl. xv. 79 (1888); Graeb- 
ner in Engler, Pflanzenr. iv. no. 10, 17 (1900). S. multipedunculatum 
Rydberg, Bull. Torr. Cl. xxxii. 598 (1905).— From the Mackenzie 
River to Colorado and California; to be expected in northern New 
England and adjacent Canada. 
SUGGESTIONS FOR SPECIAL OBSERVATIONS. 
Sparganium angustifolium Michx. should be sought in the ponds 
and lakes of northwestern Rhode Island. 
S. diversifolium Graebner may be sought in northwestern Rhode 
Island, and its var. acaule should be looked for there and in central 
and western Massachusetts. 
