KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 55- N:0 5- 77 



a form with smooth fruits and the outline of it corresponds to the description. Thus 

 the plain-fruited form, liocarpus Asch. is to be held as the main-form of the species. 

 The more common form, again, with protuberances especially on the middle keel is 

 P. condylocarpus Tausch, that should be named P. trichoides var. tuberculosus Reichb. 

 (1845). A t last may be mentioned that Gandoger has constructed four different 

 species (see above!) of which P. Bcenitzii may comprehend P. panormitanus also 

 (»costa media parum prominula» etc), unless it does not refer exclusively to the 

 form minor Biv. of P. på/norm. 



Distribution. In Sweden P. trichoides occurs only at Gothenburg, Gullbergs- 

 vass, 78, Winslow (hb. Stockholm., Uppsal., Lund.) and Kvillebäcken in Hisingen, 

 01, Palmer (hb. Uppsal, et Lund.), and at Lund in the new bot. garden, 75, Tull- 

 berg (hb. Stockholm., Uppsal., Lund.): the so called P. orthorrhyncus Gdgr. 



Denmark, Falster, Stubberup, 73. Mortensen (hb. Uppsal, et Lund.): the so 

 called P. danicus Gdger or var. liocarpus Asch., i. e. the main-form ; Sjselland, 

 Nsestved, 97, Baagöe and others (hb. Stockholm. Uppsal, et Lund.). — England, 

 Surrey, 81, Beeby (hb. Stockholm.), Norwich, Babington (hb. Uppsal.). — France, 

 Lyon, 50, Guinaud (hb. Stockholm.), La Grolle, 77, Pontarlier (hh. Uppsal.), 

 Maine & Loire, 69, Le Joli (hb. Lund.), Corbeil, 40, Maire (hb. Lund.). — Ger- 

 many, Berlin, 83, Scheppig and others (hb. Stockholm., Uppsal, et Lund.), Pommern, 

 Wolgast, 66, Zabel (hb. Uppsal., Lund.), Hamburg, Sönder (hb. Uppsal, et Gothenb.), 

 Köningsberg, Medenau, 74, Bjenitz (hb. Uppsal, et Lund.), Aldenau, 75, Bjenitz 

 (hb. Gothenb.), Brandenburg, 67, Grantzow (hb. Stockholm.), Niirnberg, P^lfsman 

 (hb. Stockholm, et Lund.), Oberphalz, Gebenbach, 06, Niebler (hb. Stockholm.), 

 part of the fruits with much elongated ventral tooth; Erlangen (hb. Stockholm.), 

 Breslau, 62, Uechtritz (hb. Stockholm.), Breslau, Kleinburg, 78, Bachman (hb. 

 Uppsal.), liocarp; Trachenberg, 89, Schwartz (hb. Stockholm.), Sachsen, Hubener 

 (hb. Stockholm.), Dresden, Rabenhorst and others (hb. Stockholm.), labelled »P. tuber- 

 culosus» ; Bavaria, in stagnis ad Gaustadt, Trabelsdorf, Vollmannsdorf prope Barn- 

 berg, 03—05, Fischer (hb. Stockholm.). — Bohemia, Miihlhausen, 83, Velenovsky 

 (hb. Stockholm.). — Spain, Aragonien, 63, Willkomm (hb. Uppsal.). — Italy, Pied- 

 mont, Hohenacker (hb. Uppsal.), Naples, Goés (hb. Lund.) Palermo, 49, Todaro 

 (hb. Stockholm.), Lago di San Egedio, 48, Rabenhorst (hb. Stockholm), Cesati 

 (hb. Lund.). 



Ajrica, Port Natal, Drege, »8800» (hb. Stockholm.). 



P. trichoides Cham. & Schl. x zosterifolius Schum. 



(P. ripensis Baagöe, Préparation des Hydrophytes etc. in Compte-rendu du 

 Congrés int. Bot. Paris, 1900, 517, nomen solum.) 



This hybrid which J. Baagöe has named P. ripensis, I ha ve discerned and 

 determined in his herbarium, already in 1899. 1 In doubt at first, if not P. pusillus 



1 Together with another liybrid, P. alpinus X crispus which Baagöe 1. c. has called P. venustus, 

 see under P. alpin.! 



