—. 
‘ 6 
212. | -—-« MONOEOIA. POLYANDRIA, 
Species. 5. * ambiguum. Stem floating, dichotomous; 
leaves petiolate, pseudopinnate, . the lowest capillary, 
emerging ones pectinate, uppermost nearly entire, subser- 
_ rate; anthers partly oblong. . Has. In the spring ponds of 
~ New Jersey, floating in extensive masses. v..v. v. s. In 
Herb. Collins. Ogs. Stem diffusely dichotomous, float- 
ing, radicles often simple. Leaves attenuated below so 
leaves divided into long capillary segments, divisions of 
the upper leaves short, setaceous and acute, from one to 
$5 pair; uppermost leaves often oblong-linear and nearly 
entire. Flowers axillary, solitary, sessile, bibracteate, 
, bractes dentiform, acute. Germ quadrangular, angles 
terminating above im the segments of the calix. Calix 4- 
- parted, divisions oblong-ovate, erect, concave, reddish. 
Stamina the length of the calix, sheathed by its segments, 
ee! 
not exserted; filaments minute; anthers somewhat oblong.. 
Styles none. Stigmas 4, roundish and villous or pencil- 
late. Fruit 4 coated, cylindric-oblong seeds, furnished 
with internal sutures, and attached to a minute setaceous - 
axis. - 
B. *limosum. Stem rooting, erect; leaves rigid, partly 
entire, or divided above, mostly trifid, segments setace- 
ous and acute. Haz. On the mirey shores of the Dela- 
_ ware, also in New Jersey. This appears to be the Pur- 
_ shia humilis of Mr. Rafinesque, New York Med. Rep. 2. p. 
361? Stem erect, 2 to 4 inches high, decumbent and ra- 
-dicant, attenuated upwards. Leaves rigid and spreading, 
_ Very narrow, setaceous and acute, either simple, or irre- 
ilarly divided towards the extremity inte 2, but mostly 
3 and sometimes 4 alternate and terete segments. Flow- 
as in the preceding, but the anthers are roundish. 
‘The occurrence in some situations of pinnately divided 
leaves, as | have observed in New Jersey, proves this 
plant to be merely a variety of the former. In the herba- 
rium they would by many be considered as distinct spe- 
cies. 
_ Aquatic plants mostly producing sagittate leaves, acca- 
4 
as to appear petiolated, pectinately pinnatifid; immersed _ 
Of the genus Myriophyllum, besides the above, there is 
cies in ree and 1 in New Holland; Nos. 1 and 2 
-leaved Stamina about 24. 
Germs many. Capsules? aggregated, i-seeded, _ 
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