MONOECIA, POLYANDRIA. 
165 
Stem rooting, erect; leaves rigid, partly entire, or /2 itmosum. 
divided above, mostly triiid; segments seta- 
ceous and acute. — JSPiitt, 
Purshia humiJis, Rafinesque, New York Med. 
Rep. 2. p. 36 1 ? 
A small plant, growing* on the overflowed banks of the Dela- 
ware, just above Kensington. 
356. SAGITTARIA. Gen. pi. 1441. (Junci.) 
Calix 3-leaved. Petals 3. Stamina about 
24. Germs many. Capsules f aggregated^ 
1-seeded^ not opening. — JTutt. 
1. S. leav^es ovate, acute, sagittate; lobes ovate, sagUtifoUa. 
very slenderly acuminated, straight; scape 
simple ; flowers monoicous ; bractes subrotund- 
obtuse. — Willd. 
S. sagittifolia, Mich, and MuhL 
S. latifolia, Pursh, and Willd. 
leaves large, abruptly acute ; scape somewhat ^ latifolis, 
branched ; flowers dioicous . — Purslu 
S. sagittifolia, j3. major, Pursh. 
Arrow-leaved Arrow-head. 
A very fine looking plant, in profusion in all the ditches and 
on the margins of all the waters of our neighbourhood. From 
twelve inches to three feet high. Flowers white. /2. is also 
very common, and always a much larger plant. The Indians 
are said to have roasted the roots of this plant for food. Pe- 
rennial. July, x\ugust. 
£. S. leaves dilate-ovate, rotund-obtuse, mucro- obtusa, 
nate, sagittate; lobes close together, oblong, 
obliquely acuminated, straight; scape single; 
flowers dioicous; bractes ovate, acute. — Willd. 
and Pursh. 
Obtuse-leaved Arrow-head. 
In similar places with the preceding, but rare. Flowers also 
white. Perennial. July, August. 
15 =^ 
