312 Fluviales. 



n4 s, /i?in flnviis, ^^in lacubus niajoribus, 6 in pa- 

 lustribus exsiccatis, liniosis. Florct aestate. 2\. 

 Ccl. KocU (Synops. 675.) formam ;- lacustrem ad P. 

 uitentcm JFeJ. ducit. 



2) Folia omuia subraersa , conformia, lanceolata , ob- 

 lonpfa vel ovala, reticulalo-pluri-(.3 — 7-)nervia, mcm- 

 branacea, pellucida. Slipulae inter se connatac, a folio 

 distinctac. 



4. Potamogeton lucens Ldnn.Spec. 183. Flor. Dan.t 195. 

 Engl. Bot. t.S~6. Cham. Adnot. 6. Schlechtend. Be- 



rol 1. 114. Mert. et Koch. Germ. 1.848. 



Caule ramoso, tereti; foliis omnibus submersis, con- 

 formibus, breviter petiolatis, oblongo-lanccolatis, acuto- 

 mucronulatis vel acuminatis, basi in pctiolum decurrenti- 

 bus, marjfjine subtilissime ct arg^ute denticulato-scabris, 

 membranaceis, pellucidis; stipulis inter se connalis, a pe- 

 tiolo distinclis, elong-atis; pcdunculis superne incrassatis; 

 fructibus (recentibus) lateribns comprcssis, obtusang-ulis, 

 levitcr carinatis. 



P. Proteus Uicens Cham. el Schlechtend. in Linnaeal. 197. 



P. serratum Web. Pritn. 16. 



In fluviis et lacubus frcquens. (In der Spree 

 und Havel, im Grunewald, bei Tegcl, Wcissen- 

 see, caet.) Floret aestate. 2j. 



5. Potamogeton praelongus Wulf. in Roem. ArcJiiv. 3. 

 331. Chamissoy Adnot. 6. Mert. et Koch. Germ.l. 851. 



Flor. Dan. t. 1687. Reichenh. Ic. 2. /. 323. 

 Caule ramoso, lereti; foliis omnibns submersis, con- 

 forniibus, sessilibus, ol)longo-lanceolatis, basi rotundata 

 semiamplcxicaulibus, obtusis, muticis, apice cucnllato- 

 contraclis, (cxsiccatis apice bilobis), margine lacvibus, 

 membranaccis, pellucidis; stipulis inter se connatis, a folio 

 distinctis, liyalino -membranaccis, serius cvanescentibus; 

 peduncnlis acquitercJibus; fructibus (siccatis) lateribus 

 comprcssis, dorso alato-carinatis. 



P lii- 



