
MONOECIA, POLYANDRIA. 165 
Stem rooting, erect; leaves rigid, partly entire, or 4 “mew 
divided above, mostly trifid; segments seta- 
ceous and acute.—Vutt. 
Purshia humilis, Rafinesque, New York Med. 
Rep. 2. p. S61? f 
A small plant, growing on the overflowed banks of the Dela- 
ware, just above Kensington. 
356. SAGITTARIA. Gen. pl. 1441. (Junci.) 
Calix 3-leaved. Petals 3. Stamina about \ 
24. Germs many. Capsules ? aggregated, > 
i-seeded, not opening. —Vutt. 
1. S. leaves ovate, acute, sagittate ; lobes ovate, sagittifolia. 
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 2 iatijviia. 
branched ; flowers dioicous.—Pursh. 
8. sagittifolia, 6. major, Pursh. 
Arrow-leaved Arrow-head. 
A very fine looking plant, in profusion in all the ditches and 
on the margins ofall the waters of our neighbourhood. From 
twelve inches to three feet high. Flowers white. . 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, August. 
» 2 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* 

