164 
MONOECIA, POLYANDRIA. 
Tuscarora Rice. Wild Rice. Indian Rice. 
anibigwum. 
From three to six feet high. On the shores of the Dela- 
ware and Schuylkill, and in ditches in the Neck, in profusion. 
Perennial. July, August. 
ORDER VI. POLYANDRIA. 
355. MYRIOPHYLLUM. Gen. pi. 1440. (JYajades.) 
Calix 4-cleft. Petals % caducous. Stamina 
% or 8. Germs 4. Styles none. Stig- 
mas pubescent. Seeds % coated. — JS^utt. 
1. M. stem floating, dichotomous ; leaves petiolate, 
pseudopinnate, the lowest capillary, emerging 
ones pectinate, uppermost nearly entire, sub- 
serrate ; anthers partly oblong. — O bs. Stem dif- 
fusely dichotomous, floating, radicles often sim- 
ple. Leaves attenuated below so as to appear 
petiolated, pectinatcly pinnatifid ; immersed 
leaves divided into long capillary segments, di- 
visions of the upper leaves short, setaceous and 
acute, from one to five pair; uppermost leaves 
often oblong-linear and nearly entire. Flowers 
axillary, solitary, sessile, bibracteate, bractcs 
dentiform, acute. Germ quadrangular, angles 
terminating above in the segments of the calix. 
Calix 4-parted, divisions oblong-ovate, erect, 
concave, reddish. Stamina the length of the 
calix, sheathed by its segments, not exserted; 
filaments minute; anthers somewhat oblong. 
Styles none. Stigmas 4, roundish and villous or 
pencillate. Fruit 4 coated, cylindric-oblong 
seeds, furnished with internal sutures, and at- 
tached to a minute setaceous axis. — 
Myriophyllum-Ptilophyllum, ambiguum, Nutt. 
In springs, ponds and ditches, in Jersey ; common. 
