272 



J. O. HAGSTROM, CRITICAL RESEARCHES ON THE POTAMOGETONS. 



Lindenhergii Lehm. ap Geaebn., 1. c, 81 (is Zizii M. K.V 



ex Gk., 1. c. ). 

 Knealis Petermann, Anal. Pfl. schliissel, 1846: pectin. 



L., var. 

 linearifolius Hagstr. — 143. 

 linearis L^ST. — 219. 

 linearis Benn. — 193. 

 linearis Stme. — 193. 



linguatns Hagstr. — 7, 10, 141, 151, 161, 162, 163. 

 linipes Hagstr. — 17. 

 Lintoni Fryer, The sixteenth Ann. Rep. Wats. Bot. 



Exch. CI. 1899—1900, Journ. of Bot. 1900, 366: 



crispus X Friesii. 

 liocarpws Ascii., PL Prov. Brand, etc. 1864, 665: tri- 



choides Ch. & Schl., v. — 77. 

 liocarpus PiscH., 1. c, 97: actdifol. Link., f. — 71. 

 lithuanicus Gorski. — 225, 242—246. 

 Utoralis Fr., Nov. fl. Suec. 1828, 35: nitens Web., f. 

 Llvingstonei Ar. Benn., Naj. in Thiselton Dyer, Fl. 



trop. Afv. VIII. 2, 1901, 223. — 53. 

 locnlosns Hagstr. — 119, 120. 

 Loeselii Eoem. & SCH. — 254. 

 lonchitis Tuck. — 184, 190, 200. 



lonch. X amplifolius ex Ar. Benn., Journ. Bot. 1901, 199. 

 lonch. X rwfescens ex MoR., 1. c., 1893, 22: P. Faxoni 



MoR. — 200. 

 longepedundidatus Merat. — 205. 

 longicatdis C. 6. Westerlund, Ronnehytr. f. o. fl. 1890, 



155: P. polygonif. PouRR., f. ( = f. cordifolius Cham. ). 

 longifolius Bab. in Engl. Bot., Suppl. 1840, t. 2847. (is 



Bahingtonii Ar. Benn.). — 247. 

 longifolius DC, Fl. frangaise vol. VI, 1815, 311. — 202, 



233, 235—237. 

 longifolius Fieb., 1. c., 32: crispus L., f. — 60. 

 longifolius PiscH., 1. c., 1907, 37: natans L., f. 

 longifolius FisCH., 1. c., 115: pusillus L., f. 

 longifolius Gay. — 202, 244. 

 longif. X lucensf ex Ktjpffer, 1. c., 162. 

 longifolius X perfoliatus ex Kupffer, 1. c, 171. — 245. 

 longifolius Hagstr. — 244, 247. 

 longifoliiis L^st. ap. Beurl., Syn. etc., in Bot. Not. 



1853, 88: rufescens Schr., v. — 143. 

 longifolius Tis., Pot. suec. exs. I, 1894, n. 15: alpinus 



Balb., f. (= longifolius L;est. ). — 143. 

 longifolius Tis., 1. c, III, 1897, n. 146: perfol. L., f. — 



227, 256, 257. 

 longipedunculatus Tis. — 48. 

 longi'pedunculatus Tis., 1. c, II, 1895, n. 64: lucens L. 



var. — 214, 215. 

 longipes FiscH., 1. c, 115: pusillus L., f. 

 longipes Hagstr., P. fennicus, f. — 25. 

 longipes Hagstr., P. franconicus, f. — 126. 

 longipes Rohlena, in Sitzber. Bohm. Ges. Wiss. 1902, 15: 



lucens L., v. 

 longipetiolatus Fischer in Baumann, Veget. Untersees 



1911, 101: Zizii X gram., f. 

 longipetiolatus Tis., 1. c, II, 1895, n. 60: lucens L., v. 



— 213. 

 longissimus Mert. &l Koci-i ap. Spenner, PI. frib. I, 



1825, 35; pectin. L. var. 



lucens L. — 4, 5, 7, 9, 11, 12, 67, 164, 181, 184, 185, 188, 



190, 198, 199, 200, 202—204, 207, 208, 209 219, 



225, 233—248, 258. 

 lucens X gramineus ex Fryer {Zizii M. & K., p. p. (the 



typical forms). — 215. 

 lucens X gramin. (P. Heidenreichii Asch. & Gkaebn.). — 



164, 215. 

 lucens X natans (P. fluitans Bth., ex p. (ex Buchenau, 



Fl. Nordw. Tiefeb., 1894, 48. — 238. 

 lucens X natans (P. fluitans Auctt.) ex Radnkijsr, 



Danske Blomst. etc. I, 1896, 97. — 238. 

 lucens X natatis (P. Noltei FiscH.). — 208. 

 lucens X natans (P. sterilis Hag.str. ). — 185, 218, 219, 



234, 237—241. 

 lucens X nodosus (P. ruhrufus Hagstr.). — 12, 185, 237, 



239, 240—242. 

 lucens X perfoliatus ex Marss. — 12, 242 — 246. 

 lueens var. longifol. X perfoliatus ex Kupffer. — 245. 

 lucens X polygonifoUus (P. Drucei Fryer) ex Fryer, ap. 



Graebner, Pot. in Engler, 1. c, 1907, 65, 138. 

 lucens X prcelongus ex Caspary. — 12, 215, 243, 246, 247. 

 lucens X pralongus (P. Bahingtonii Ar. Benn.). — 246, 



247, 258. 

 lucentiformis Hagstr. — 213. 

 lucescens Tis., 1. c, II, 1895, n. 59: lucens L., p. — 213, 



215, 235. 

 lucidus Guldbnstedt, Reise durch Russl. etc. I, 1787, 



76. — 233. 

 Lundii Eight. — 226, 228, 232. 

 hixurians Doll., Fl. des Grossherz. Baden, 1857 — 62, 



458. — 50. 

 luxuriosus Hagstr. — 16, 18. 

 Alaackianns Ar. Benn. — 56 — 57, 67, 87. 

 Maackianus X malaianus (P. pliilippinensis Ati. Benn.). 



— 57. 



machianus Lowe, ap. Graebn. Pot. in Engl., Pfl.reich 



IV. 11, 1907, 58 (= fluitams Roth, ex Grjsbn., 



1. c). 

 macMcanus Mandon in herb. — 189. 

 Macounii MoR. — 18. 

 macrocarpus FisCH., Bayer. Pot. etc. 1907, 115: pusillus 



L., f. 

 macrophjlloides Hag.str. — 202. 



macrophyllus AscH. & Ge., 1. c, 314: perfoliatus L., subv. 

 7nacropliyllus Bl. — 256. 



macrophyllus Fr., 1. c., 1828, 33: lucens L., a. 

 macrophyllus Wallr., Schedulse crit. 1822, 65: lucens 



L., p. 

 macrophyllus Wolfg. — 233, 235. 

 macrorrhyncus Gandog. — 58, 60. 

 Macpicurii Ar. Benn. in Ann. Scot. Nat. Hist. 1907, 



106 — 108: prcelongus X polygonifoUus. 

 maderensis Hagstr. — 177. 

 nmlarensis Tis. — 226, 230, 232. 

 magellanicus Hagstr. — 27. 



Magnini RouY, Fl. Fr., T. xiii, 315.: pnel. Wulf., s. 

 magnus Tis. — 65. 

 major Ar. Benn. — 130, 133. 

 major Fieb., 1. c, 1838, 34: acutifolius Link, var. 



— 71. 



