230 



other specimens, and the axial cylinder being built most as in 

 F.perfoUatus, therefore I suppose a P. crispus x P.perfoliatus.'^ 



Taking for granted that the plant found in England is .a 

 hybrid betAveen P. crispus and P. pterfoliatus , P. undulatus 

 Wolfg. has not to my knowledge been found anywhere but 

 between 53° and 56° n. lat. namely: 



Russia, hi the river Woha at Wilna according to 

 Roemer & Schultes „Mantissa", and an original specimen 

 is labelled as thus in the Museum of St. Petersbourg. 



East-Prussia (All specimens gathered by Gaspary). 



1) See von Hochwalde ^^'s 1879. 



2) See von Kutzborn bei Wartenberg ^^ii 1880. 



3) Grosser Aarsee bei Kirsch -^h 1880 with the note: 

 „Spitze des Blattes kapuzenformig". 



4) In the river Neide bei Niederthal, Kreis Neidenburg ^/s 

 1862 „mit ungewohnlich breiter kapuzenartiger Spitze". 



5) P. decipiens Nolle, „See von Radigkeinen bei Altenstein 

 in dem nordwestlichen torfigen Zipfel, sehr wenig, bloss 

 dies Exemplar mit Blilthe gefunden". 



P. perfoliatus und P.jJraelongus beide im See ^^/s 1869. 

 Frucht nicht da. Farbe blaulich griin. L. Gaspary leg. et serv. 



To this specimen the Museum has later added the fol- 

 lowing note: 



„ Blatter kappenformig, jedoch nicht so stark als P.praelon- 

 gus. Torfboden. Wurde ^^/s 1869 von „Gaspary fiir P. de- 

 cipiens Nolte gehalten, spater als P.cnspiis x P.praelongus 

 erkannt". 



W e s t - P r u s s i a. Found in several lakes, by Gaspary f. in. 



1) Shesau See, Kreis Berent ^s/s 1872, 



2) Dlugi See, Kreis Karthaus, from which it was ^^,'4 1880 

 transplanted to the Botanical Garden in Konigsberg, 

 where it flowered ^Ve 1885. The last-noted finding is 



3) Glemboki See ^k 1885 1). 



') By the kindness of Professor Luerssen I have been able to exa- 

 mine all the specimens of the Konigsberg Museum from 24 different 

 native places. 



