166 
heterophylla? 3, S. leaves simple, linear and lanceolate, acute at — 
acutifolia. 
subulata& 
MONOECIA, POLYANDRIA. 
each end, or elliptical acute; base obtuse, sa- 
gittate; lobe divaricate, linear; scape simple, 
few-flowered; flowers monoicous, feminine 
sessile; bractes broad-ovate, acuminate.— 
Pursh. . 
S. lancifolia, Bart. Prod. Fl. Ph. 
Varying-leaved Arrow-head. 
Iam not certain that the plant intended above, is Pursh’s 
heterophylla, but it fits the description in part. It can hardly 
be the lancifolia of Mich., which is a southern plant. In 
similar places with No. 1, common, varying in size from one to 
three feet. The scapes are round, the long petioles triangular ; 
sheathing at the root. Ina pool onthe left of the road near 
Lemon-hill, abundant. Perennial. June, August. 
4, S. leaves subulate, sheathing at the base; back 
convex; scape simple, few-flowered ; flowers 
monoicous ; bractes dilated, acuminate.—Pursh. 
Acute-leaved Arrow-head. 
From three toten inches high. Leaves often with a dilated 
point. On the marshy shcves of the Delaware, at low tide; 
common. Perennial. July, August. 
5. S. leaves linear, obtuse and short, the summits 
foliaceous ; scape simple, shorter than the leaves; 
flowers monoicous, few ; female fiower solitary, 
deflected ; stamina mostly seven.— Vutt. 
S. pusilla, Nutt. 
Alisma subulata, Pursh. 
From one to three or four inches high. I have strong sus- 
picions that this is nothing more than a variety of No. 4. For 
the present I leave it undecided. With No.4, common. Pe- 
rennial. July, August. 

