CI. IV. Tetrandria. 157 



En, pl Volh, p. 8. No, 179. — Falk. top, Bej^. 

 IL p. 121. — Sievers in PalL n. nord. Beyir. VXL 

 p. 267. Cchamiss, et Schlechtend, in Linnaea 11. 2. 

 p. 217 t. 6. /. 20. 



P. natans. a. vulgaris. Mert. et Koch, Deutschl. Fl. 

 L p. 837. 



Potamogeton No. 24. Gmel Fl. sih. IIL p. 34. 



Hab. in il* Alei (I/.)> '^^ '^cu aureo (Altyn-kul kalmucc; 

 Teletzkoe osero Ross.) (B.) — in fluv. Bekun. (M.); — 

 in fl. Kopkuckto {Sievers), — 2JL. 



2) PoTAMOGETON RUFESCENS. Schrad, 



P. caule subsimplici, foliis integerrimis j submer- 

 sis lanceolatis se^silibus membranaceis pelluci- 

 disj summis subcoriaceis spathulatis in petiolum 

 attenuatis, pedunculis aequalibus, spicis densiflo- 

 ris, carpellis compressis acute carinatis stylo bre- 

 vissimo apiculatis. 



P. rufescens. Schult. Syst, veg, III. p. 610; Mantiss, 

 p. 358. — Spreng, Syst. veg. I, p, 498. — Reichenh. 

 Iconogr. hot. Cent, IL p, 77. t, 184. — Cham, et 

 Schlechtd. l. c, p. 210. t. 5 /. 18. 



P. rufescens. «. palustris. Mert. et Koch, Deutschl. Fl. 

 L p, 841. 



Stirps altaica cum speciminibus germanicis et livonicis 

 ad amussin convenit; ab icone Reichenhachii nonnisi follis 

 submersis longioribus angustioribusque (saepe 4 poll. lon- 

 gis, vix 4 lin. latis) et stylo breviore discrepat. Caulis cum 

 foliis summis et spicis coloratus, rufescens. 



Hab. in rivulo Altjn-ssu deserti occidentalis soongoro- 

 kirghisici (7H.) in fluv. Koksun. (L.) 2|.. 



