KTJNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 55. N:0 5. 



265 



amphibius, Fk., 1. c, 35: nitens Web. *C- 



amphihiws Fb., 1. c, 30: oblongus Viv. f. — 177, 180. 



amphibitis Hagstr. — 153. 



amplexicaidis Kar. (is considered a syn. of perfoliatus 



L.). — 254. 

 amplexicaulis Moser ap. Ar. Benn., Bern. etc. in Ann. 



Nat. Hofm. 1892, 290 (= the prec). 

 amplifollns Tuck. — 151, 163, 104, 190, 191, 198. 

 ampl. X illinoensis (P. sooliopliyllns Hagstr.). — 164. 

 ampl. X fluitans f ex G-raebn., Potamog. in Engler, 



Pflr. IV, 11, 1907, 133. 

 anceps, Muhlenb., Cat. pi. Amer. sept. 1813, 18: stwo- 



edged pondweed»: M., for the rest not described. 

 angermanicus Tis., Pot. suec. exs. I, n:o 24, 1894: gra- 



mineus L. f. — 206. 

 anglieus Hag.str. (colorattis X polyonif.). — 180. 

 angustatus M & K. in Rohling's Deutschl. FI. I, 1823, 



838: natans L. •(. (may belong to P. sterilis Hagstr. 



as well as to P. nodosus Poir. The length of the 



petioles of the ui>per leaves in relation to their blades 



is not stated). 

 angustatus Wallm. — 115. 

 angustifolius Ascil. & Gr., Syn. 1897, 311: cdpinus Bale. 



var. 

 angustifolius Ar. Benn. ap. Asch. & Gr., 1. c, 306: po- 



lygonifolius PouRR. f. 

 angustifolius Bl., Norges Fl. 1, 1861, 365: lucens L. v.? 

 angustifolius Caley ox Graebn., Pot. in Engl., I. c, 



101 = ochralus Raoul, ex Gr., 1. c. 

 angustifolius Cham. & SciiL., De plan tis etc., in Linnsea, 



1827, 210: rufescens SCHR. — 142, 143. 

 angustifolius Custer in Dalla Torre & v. Sarnth., 



Fl. Gef. ttrafsch. Tirol., 1906, 126: natans L. f. 

 angustifolius DC, Fl. fr. VI, 1815, 311: opposHifolius 



Lam. & DC, p. 

 angustifolius Fibb., Pot. Bohm., 1838, 30: nitens Web. f. 

 angustifolius Fieb., I. c, 32: crispus li. t. — 60, 61. 

 angustifolius Fieb., I. c, 38: obtusifol. M. K. a. 

 angustifolius FiscH., Beitr. etc. in Mitt. n. 32 bayer. 



Bot. Ges. 1904, 377: mucroiiatus SciiR., var. — 95. 

 angustifolius Fiscir., Bayer. Pot. 1907, 97: vompressus 



L., f. — 66. 

 angustifolius Fiscii., 1. c, 97: acutifol. Link., f. — 71. 

 angustifolius FisCH., 1. c, 116: piisillus L., f. 

 angustifolius FiscH., Bern, zu den Pot. in 2 Aufl. Syn. etc. 



in Mitt. Bayer. Bot. Ges. 1914, 106: Zizii M. K., f. 

 angustifolius Fr,, Nov. etc. 1828, 30: oblongus Viv., f. — 



177, 178. 

 angustifolius Graebn., Pot. in Engleb, 1. c, 97. — 251. 

 angustifolius Hornem. Fl. Dan., 1819, t. 1635; lucens 



L., var. (is = alpinus Balb.). 

 angustifolius Meyer, Chloris Han., 183(T, 519: natans 



L.,var. (only described as nSchmalblattriges scliwim- 



mendo Laichkraut»). 

 angustifolius Neilr., Fl. v. Niederosterr. 1859, 218: jm- 



sillus L., var. 

 angustifolius J. S. Pbesl. — 210., 211, 215. 

 angustif. X heterophyllvs (P. varians Moix. ex Fryer) 



Ar. Benn. in I-inton, Hybrids etc. in Journ. of Bot. 



1907, 300. 



K. Sv. Vet. Akad. Handl, Band 55. N:o 5. 



angustif. X lucens (P. curvatus Ar. Benn., Notes etc. 



in .Tourn. of Bot. 1908, 249). 

 angustifolius ScHULT., Mant. in vol. Ill Syst. etc. 1827, 



364: pectinatus L., var. 

 angustifolius Tausch ap. Fieb. 1. c, 17: rufesc. SciiK. var. 

 angustifolius Tis. Pot. Svec. exs. I, 1894, n. 25. — 206. 

 angustifolius Wailr. Sched. crit. 1822, 66. — 262. 

 angustissimus Ar. Benn., Forms of Pot. in Journ. of. 



Bot., 1907, 174: zosterifoUus ScnUM. f. 

 angustissimus Hagstr. — 188, 189. 

 angustissimus Kunth. — 39. 

 angustissimus Wallr., Sched. crit. etc., 1822, 68: pu- 



sillus L. V. p. 

 annulatus Bell. — 141. 

 antaicns Hagstr. — 105, 106. 

 antillanus Kunth, En. pi. Ill, 1841, 128: natans L., f. 



(= nodosus Poir.; Linnsea, 1827, has an incorrect 



statement of this f. ). 

 ftpicaHs Hagstr. — 156, 157. 

 apicatus Hagstr. — 78. 

 apiculatus Fieb., 1. c, 38: obtusif. M. K., f. 

 apiculatus FisCH., Bayer. Pot., 1907, 115: pusillus L., f. 

 argentinus Ar. Benn., Notes etc. in Journ. of Bot. 1908, 



250: pusillus L. subsp. 

 argutulus Hagstr. (gramineus X nodosus). — 220. 

 Arrhenii Fr. Summa Veg. Scand. 1, 1846, 68 et Herb. 



Norm. V, 74. — 177. 

 Ascliersonii Ar. Benn. — 88, 108, 110—113. 

 asiaticiis Ar. Benn., Notes on Pot. in L'Annuaire Cons. 



Geneve, 1905, 103—129. 

 attenuatus Hagstr. (Berteroanus X polygonus). — 112, 



113, 114. 

 augustanus Balb. — 205. 

 aulacophyllus Schumann. — 26. 

 australlensis Ar. Benn., in Journ. of Hot., 1910, 149. 



— 169, 175. 



auslralis Kirk, ap. Ar. Benn., Bern, in Annal. nat. 



Hofm. 1892, 286: natans L., var. (= Cheesemanii 



Ar. Benn. ex Ar. Benn., 1. c). 

 australis Phil., Verzeichn. der von Pr. Phil. ges. Pfl. in 



Anal. Mus. Chil., 1891, app. 95. — 40. 

 austriacus Gandog. — 58. 

 austrinus Hagstr. (The Journ. of Bot. 1908, 250 has 



austriacus, misprint.). — 102, 103. 

 azoricus, Ar. Benn., Notes etc. in Journ. of Bot. 1904, 



71: lucens L., var. (is a dist. spec, ex Hagstr.). — 



198, 237. 

 Baagoei Ar. Benn. {alp. X vrispus, see, venustus "Bg-eI). 



— 144. 



Babingtonii Ar. Benn. {Inc. X pnel.). — 222, 244, 246, 



247. 

 badiorlridis Hagstr. — 151, 161. 

 badins Hagstr. — 104. 

 Bmnitzii Gandog., Pug. pi. etc. in Osterr. Bot. Zeitschr. 



1881, 19 (is likely to comprehend P. trich. as well as P. 



panormit. both of whicli are coll. by B.enitz in the 



locality recorded: Modonau at Konigsberg). — 74, 



77, 103. 

 bambergensis FiscH. {zost. X acutifol. ex FisCH. ). — 66. 

 barensis Hagstr. — 164. 



34 



