31 



///, 4. p. 747. — Luce Fl. osil. p. 397. — Hofft Cat. Kursk. p. 13. — 

 Eichw. Skiaze p. 126. — Lessing. in Linnaea IX, p. 206. — Weinm. Fl. 

 petropol. p. 20. — Fleisch. et Lindem. Fl. d. Ostserprov. p. 68. — Nylander 

 Spieil. pl. fennic. I, No. 26. — Nylander Paroec. Pojo. No. 354. — Rup- 

 recht Fl. Samojed. cisural. No. 271. — C. Koch in Linnaea XXII, p. 274. 

 P. Vaillantii. R. et Scn. Syst. Vcget. 111, p. 514. — Ledeb. Fl. alt. I, p. 159. 



— Lessing in Linnaea IX, p. 155. » 

 P. vaginatus. Turcz. Cat. Baikal. No. 1092. 



P. fasciculatus. Wolfg. in Schult. Blant. in Syst. Veg. III, p. 364 (forma minor). 



— Eichw. Skizae p. 126. 



Hab. inRossia arctica [terr. Samojed. ad promont. Barmen (Ruprecht)]. s e p- 

 t e n t r i o n a I i [Ostrobothnia (Nylander), Fennia (Kalm, Nylander)] et m e d i a 

 [Petropoli! (Weinm ), ins. Osilia ! (Luce) , Lithuania et Curonia! (Fleisch. et 

 Lindem.), Lithuania! (Wolfg. et Besskr pl. exs., Eichw.), Volhynia (Eichw.), 

 Kursk (Hofft), Wiatka (Lepech.)], in pro v in ci i s caucas ici s [in fl. Terek 

 inque Iberia (C. Kocr) m. caspii insulis Nephtenoi (S. G. Gmel.) et Sara! 

 (Kiesf.kitzky pl. exs.)] inque Sibiria uralensi pr. llezkaja Saschtschita 

 (Lessingi, altaica! (Fl. ai.t.) in desert. soongoro-kirghisico pr. Karakingi! 

 (Schrenk pl. exs.) et baikalensi ad salinas pr. Selenginsk ! (Turcz.). 4- 



P. amblyophyllus C. A. Meyer (Beitr. z. Pflanzenk. d. Russ. 

 R. VI, No. 31) vix nisi foliis obtusis , rarissime subacutiusculis , dif- 

 ferre virletur. 



21. P. marinus (L. Spec. 1S4) foliis omnibus submersis membra- 

 naceis pellucirlis basi vaginantibus linearibus v. Iineari-setaceis acutis 

 uninerviis transverse venosis: venis crassiusculis , spicis longe perlun- 

 culatis, fructibus obovato-subglobosis , siccatis corrugatis dorso lato- 

 rotundato ecarinatis. 



P. marinus. Koch Syn. ed. 2, p. 781. — Kalm Fl. fennic. No. 100. - Fisch. 



Livl. p. 194. — Georgi Beschreib. d. Russ. R. III, 4. p. 747; Nachtr. 



p < 25 9. _ Besser Enum. p. 8, No. 183. — Luce Fl. osil. p. 41. — Eichw. 



Skizze p. 126. — Fleisch. et Lindem. Fl. d. Ostseepr. p. 68. — Nylander 



Spicil. pl. fennic. I, No. 27. — Nylander Paroec. Pojo. No. 355. — C. Koch 



in Linnaea XXII, p. 274. 

 P. filiformis. Pers. Syn. 1, p. 152. — Chamiss. et Schlechtend. «t Linnaea II, 



p. 167 (excl. syn. M. et Koch Deutschl. Fl.). 

 P. setaccum. Schumach. Fl. Saell. p. 51. 



Hab.inRossia s epten tri onal i [Ostrobothnia (Nylander), Fennia (Kalm, 

 Nylander)], media [Petropoli! (Kiihlewein pl. ex.), ins. Osilia (Luce), Li- 

 vonia (Fisch. , Fleisch. et Lindem.), Curonia (Fleisch. et Lindem.). Liihua- 

 nia! (Wolfg. pl. exs., Eichw.), Volhynia (Besser)] et australi [Podolia 

 (Besser)] inque Tauria! (Ledeb.) et provinciis caucasicis [lberia 

 (C. Koch)]. 21. 

 Sect. V. Enanthiophylli. Koch Syn. ed. 2, p. 781. 



Tota planta submersa: spicis sub anthesi tandem emersis. Folia 

 pellucida, conformia, omnia opposita. 



22. P. densus (L. Spec. 182) foliis omnibus oppositis et sub- 

 mersis membranaceis pellucidis sessilibus amplexicaulibus ellipticis 

 ianceolatis v. lineari-lanceolatis , spicis alai'ibus breviter pedunculatis ; 

 defloratis reflexis , fructibus siccatis compressis Jato-carinatis ro- 

 stratis. 



P. densus. Koch l. c. p. 781. — Kunth Enum. III, p. 138. — Georgi Beschr. 



d. Russ. R. 111 , 4. p. 746. 

 a. lalifolius: foliis ovatis acuminatis. 



P. densus. L. I. c. , 



