ELODEA.

IIYDROCHARACEAE.

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Floribus poly^amis; masculo antberis 9, in spatlia uniflora ovala velovato-elliplica, tempore foecundationis soluto; flore hermaphrodito anlheris3, 6 (vel ultra?); petalis tribus, sepala tria longitudine subaequanlibusvel paululum superantibus; antheris flavis; filamentis in fl. masc. saepiussubnullis , in flore hermaphrodito antheram longitudine subaequanlibus;stigmatibus petala fere bis superantibus; foliis lineari-lanceolatis, plusminus versus apicem attenuatis, aculis, vel rotundato - acutis, 4—6"'longis, latis, serrulatis, ternis, rarius quaternis; seriebus

2—4 marginalibus cellularum folii iy 2 —2 longitudine cellulas' discisuperantibus et chlorophyllo pauperioribus.

Planta hermaphrodita:

Elodca canadcnsis Rich. in Michx. I. c. 1803. (Triandria Monog.); Boem. etSchnlt. Liu. syst. II. 871. — Serpicula verlicillala Muhlenb. Calai. 1813.p. 84. (ex Darlingt.). — Serpicula occidentalis Pursh FI. Ani. sept. 1814.

1. p. 21 et 33. — Serpicula canadcnsis Eaton Man. 1833. p. 336.(ex Darlingt.).

Ilab. Amer. bor. V. s. in h. Mus. Par. (spec. orig. Miehauxii in li. Midi, et li. Desfonl.);in h. VirnloI)., Lipsiensi et Mus. Par. plantam in Pensylvania pr. Bethlehem a Moserolectam; in ii. Jacq. Gay (Pensylvania, Lecha, Moser) ; in b. Lipsiens. (Amer. bor..Schweiuiiz).

Planta dioica:

Udor a canadensis Nuitall gen. of North - Amer. pi. 1818. 11. 242. (DioeciaEnneandria); Beck bot. ol’ north. and mid. sthles 1833. p. 342; DarlingtonFl. cestrica 1837. p. 570. — Udor a t'erticillala (ex parte) Sprengcl Lin.syst. 1825. I. p. 170; Hooker 11. bor. amer. 1840. II. p. 193; ReichenbachIcon. fl. Germ. et Helv. 1845. VII. t. 59. flg. 105. — Udora verlicillala (?)minor Engelmnnn Ms. — Udora occidentalis (ex parte) Koch syn. 1837.Ed. X. 669; Bluff, N. ab E., Schauer Comp. 1838. p. 724 et 725). — Ana-charis JSuttalii Planchon Ann. and Mag. of nat. hist. II. ser. 1848, I. p.85; Ann. d. sc. nat. III. ser. 1819. XI. p. 74. -- Anacharis AlsinastrumGabington Ann. and Mag. of nat. hist. II. ser. 1848. I. p. 85; Ann. sc.nat. III. ser. 1849. XI. p. 66; Gabington Manuat 1851. p. 304; Eng,Got.; Hooker and Arnott brit. Fl. 6. ed. 1850. p. 401. — Marshali tlicnew waterweed 1852.

Ilab. Amer. bor. e. g. prope St. Lotiis et Newyork; pl. foeminea ia Angliam, Scotiamet Hiberniam immigravit. V. v. pl. angiicam mihi a cl. Edw. T. Dennctt, BrockbamLogde, Belchworth, .Surrey missam et in hort bot. Berol. cultam. V. s. in h. Hooker(Newyork, Torrey — Am. bor., Goldie) et plantam ab Engelmanno prope St. Louislectam in h. AI. Graun , in b. r. Berol. et Lipsiens.

Planta polygama:

Udora canadensis Torrey FL of thc state of Newyork 1843. II. 264. — Ana-s charis canadensis Asa Gray Manual of ihe bolany of ihe north. unit. States.

2. ed. 1856. p. 441.

Flores polvgami nondum uno eodemque loco lecti.

? 2. ELODEA LATIFOLIA Casp. i. c.

Foliis superioribus acutis, non acuminatis, oblongis, ternis, omniumHydrillearum latissimis, 1V 2 — 2"' latis, 3 —37 2 "' longis, serrulatis;stipulis suborbicularibus, margine nonnullis cellulis brunnescentibushemisphaerice prominentibus.

Flores ignoti. An forma Eiod. canadensis? — V. s. in h. Vitulo!), et Lipsiens. aScluveinitzio in Amer. Itor, lectam.

3. ELODEA SCIIWEINITZll Casp. i. c.

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