MONOECIA, POLYANDRIA. ett | 
-. 
Orver VII.—POLYANDRIA. © 
748. CERATOPHYLLUM, L.. (Hornwort.) 
Masc. Calix many-parted. Corolla none.. 
Stamina 16 to 20, very short. Anihers tricuspi- 
date. Frm. Calia 6-leaved, imbricated. Co- 
rolla none. Style 1. filiform. Nut 1-seeded. 
Aquatic plants with verticillated narrow leaves, dicho- 
tomous eg ‘many-paried; flowers axillary, solitary; fruit 
naked or spinose. 
Species. 1. C. demersum. Fruit with 3 spines. 2. sub- 
mersum. Fruit nies a a ers of 2 species indige- 
nous also to Europe. . 
749, MYRIOPHYLLUM. L. (Water Milfoil.) 
Calix 4-cleft. Petals 4, caducous. Stamina. 
4, 6, or 8. Germs 4. Styles none, Stigi 
pubescent. Seeds 4, coated. — 
“Aquatics with verticillated and_ ‘pseudopinnate le 
flowers axillary, sessile and solitary; the upper —— 
masculine, the lower feminine. 
7s “Species. 1, M. spicatum. 2. verticillatum. iin: am 
F Canada to Carolina, also in Lower Louisiana. 3: scabnan ‘ee 
tum. 4. heterophylium. 
* PrrnopayLiuM. f Flowersal} Geramkrarre 
—Calix 4-clett. Petals none. Stamina 4, very, % 
short; anthers roundish, Styles hone. Stigmas mi- 
- ‘Dute, pubescent, subcapitai ges: Seedy Ay coated. 
oer arsihe wae.” Seed ay in Myrioplylium 
ipeeite nek: Proserpinare + itappears: mnfermediate 
{“ Feather leaf,” from xTiaov, Soul, and Pvas 
This i is the Purshia of Mr. Rafinesque, but scarcely. 
Onosmodivan cid ape as now 
