KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 55- NIO 5. 229 



Tjärhofvet, 64, Westling (hb. Lund.), f. maritimus; Svartsjölandet at Vändholmen, 

 81, Tiselius (hb. Stockholm., Uppsal., Lund.), f. mailarensis and f. intermedius; 

 Brännkyrka in Drefviken, 96, Jakobsson and others (hb. Stockholm.), f. subovalis; 

 Drottningholm, Känsö, 01, Lagerwall and Tiselius (hb. Stockholm.), f. perfoliali- 

 folius; Värmdön at Rörsundsvik, 94, Tiselius (hb. Stockholm., Uppsal.), f. exte?isus; 

 Tranebergsbro, 52, Thedeisiius etc. (hb. Stockholm.), f. typicus; Vinterviken, 41, 

 Ståhl, and Kungsholmen, 41, J. E. W— m (hb. Stockholm.), f. typicus; Värmdö, 86, 

 Schlegel (hb. Stockholm.), f. maritimus; Värmdö, Ekudden 87 (hb. Stockholm., 

 Uppsal.), f. maritimus, labelled »P. gramineus X perfoliatus (3 At i Hn. ed. 12. c. fr.» 

 Almquist scrips. ; Värmdö, Ekudden in palude, Tiselius (hb. Uppsal., Lund.), f. 

 vadosus; Järlasjön, Björnström (hb. Uppsal.), f. typicus; Hammarbysjön, V. B — m 

 (hb. Uppsal.); Ri valet between Rönninge Lake and Stora Värtan, 01, Jakobsson 

 (hb. Stockholm.), f. subovalis. - — Upland, Signildsberg, 1803 (hb. Uppsal.), f. inter- 

 medius; Gottsunda, 50, Floderus (hb. Uppsal.), f. fyrisensis; Sigtuna, 82, Floderus 

 (hb. Uppsal.), f. typicus; Norrtelje in the river, 84, Hedlund and others (hb. Stock- 

 holm., Uppsal., Lund.), f. typicus; Frötuna, 80, Hedlund and others (hb. Stock- 

 holm., Uppsal.), f. robustior; Frötuna, lake, 67, Thedenius (hb. Stockholm.), f. ty- 

 picus, probably the same cross as the foregoing; Upsala in the Fyris at Ensta and 

 other localities, Wahlenberg and others (hb. Stockholm., Uppsal., Lund., Gothenb.), 

 f. jyrisensis; Ensta, 82, Tiselius (hb. Stockholm., Uppsal., Lund., Gothenb.), f. inno- 

 minatus; Ensta in the Fyris, 87, Almquist (hb. Stockholm.), f. perfoliatifolius, lab. »P. 

 gramineus x perfoliatus (3 i Hn. ed. 12» Almquist scrips. Another specimen from 

 the same station is labelled »P. gramin. X perjol. a», but is evidently the same cross- 

 ing, which now approaches to P. perfoliatus and must be classed together with |3 

 sub perfoliatus, now approaches more to the other parent species and must be ref er- 

 red to v subintermedius (f. fyrisensis, f. typicus and f. intermedius). This is an evid- 

 ent instance that one and the same crossing sometimes exhibits a considerable 

 varying faculty. F. innominatus from Ensta, however, is after all a separate cross. 

 Ekeby mill, 28, Wahlenberg (hb. Uppsal.), f. typicus; Skedige, 58, Tiselius 

 (hb. Uppsal.), f. innominatus; Upsala, Wahlenberg (hb. Uppsal.), f. brevior; Lena, 

 Vattholma, 84, Österberg and Tiselius (hb. Stockholm., Uppsal., Lund.), f. per- 

 foliatifolius; Skederid, 82, Tiselius (hb. Stockholm.), f. maritimus; Almunge, Väsby, 

 68, Hjort (hb. Uppsal.), f. subovalis; Maelar, several places (hb. Stockholm., Upp- 

 sal.), f. typicus; Valö, Gålamora, 86, Fröman (hb. Stockholm.), f. typicus; Ryd in 

 Lejondalsjön etc, 81, Tiselius (hb. Stockholm., Uppsal., Lund.), f. typicus; Ryd in 

 Tranbyggeå, 03, Tiselius (hb. Stockholm.), f. subovalis; Närtuna in Trehörningen, 

 96, Tiselius (hb. Stockholm.), f. fyrisensis; Grönsö in the Mselar, 98, Tiseltus (hb. 

 Uppsal.), f. lacuum; Fasterna in Metsjön, 82, Tiselius (hb. Uppsal.), f. fyrisensis; 

 f. intermedius and f. subovalis confluent into one another, probably the same cross- 

 ing; Fasterna in Rånäs river, 82, Tiselius (hb. Uppsal., Lund.), f. robustior partly 

 like f. gotlandicus. — Westmanland, Björksta, 82, Luhr (hb. Stockholm.), Uppsal.), f. 

 typicus; Engsön, 73, Collén (hb. Uppsal.), f. typicus; Engsön, Skurusundet, 80, Luhr 

 (hb. Stockholm.), f. subovalis; Kungsåra, 86, Luhr (hb. Stockholm.), f. intermedius. 



