274 



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



myriophyUus Robb., ia ASA Gbat's Man. Bot. 1867, 



487: gramin. L., v. V 200, 209. 



mysiieus Afos 259. 

 najadoides GsAEBNEB. — 60. 

 natans L. 12, 134, 146, 147, 152, 163, 170, 184, 185, 



L89, 11)1—197, 209, 215, 216 220, 234, 237 241, 



242, 257, 2C3. 

 natans X alpin. ? (P. Drurei Peter) ex Fbtee, Pot. 



Brit. Isles, 1898: 31. — 146. 

 natans X gramin. ex äsch. & Ge., Synopsis, I, 1897, 



333. — 215. 

 natans X lurens ex Beebt, OnP. fluit. Rtli in .lourn. of 



Bot. 1890, 204. 

 natans X nodosus ex BlAGSTE. -- 185. 

 notans X pciygonifolius ex AlMQtr. in Bot. Not. 1889, 



66. 

 notans X pdlygonifölius (P. gessnacensis Fiscn., Beiträge 



etc., in Blitt, bayer. Bot. Ges. 1905, 472 et in 1. e. 



1907, 42: wahrseheinlich: F.). — 185, 192, 193. 

 vätans X polygonif. f (!'. KirMi Stme) ex Frter, ap. 



Linton, Hybr. etc., in Journ. Bot. 1907, 300. 



natans X trichoides (P. rariifolius ThOEE) ex HaGSTE. 



— 193 -195. 



natans X Zizii (P. rrassifolius FETES) ex ASCH. & Gk., 



Synopsis etc. 1897, 332. 

 nål icidaris Hagstk. (gramin. X prcel.). — 232. 

 neidensis Hagstr. - - 227, 230. 

 neridus Bagstr. (alpin. X gramin.). - 145, 263. 

 nerviger Wolfg. (alp. X pralongus). — 149. 

 a c nos i or BAGS1 it. — - 63. 

 niagarensis Ti ck., Observ. in Ainer. Jonrn. Sci. and Arts 



1819, 354. — 91. 

 m yrescens Fe. — 205, 208, 209, 230. 

 nipponicus Makino, J 11. Fl. Jap. I, 1891,2, t. 58 (The 



material is scanty: lii.w. in Journ. of Bot. 1900). 



— 57, 198. 



nitens Cham., Adnot. ad fl. berol. 1815, 6: lurens L., (3. 



— 235. 



nitens Pisch., Bayer. Potamog. 1907, 68: Zizii M. & K., v. 

 nitens \\*i i.r.i .. , ap. Cham., 1. c, 6 (= nitens Cham.). 



Wi i-.i.k. - 11, 148, 201, 209, 210, 216 218, 221 

 231, 23:;. 2)1, 252, 254, 255. 

 nitens X heteroph.tex Fetes, Supposed hyl>r. etc., in 



.lourn. of Bot. L890, 178. 

 nitens ■/ perfoliatus ex Gs., Pot. in Engi.es, 1. e., 1907, 

 138. 



nodosijo! IUS HAGSTE. 220. 



nodosus PotBET. - 7, 12, 147, 148, 151, 165, 162, 183 



190, 192, 195, 200, 201, 220, 235, 237. 2 12, 248. 

 nodo - ' \iittalii il'. ll\..-in.). 190. 



nodo a < Richard8onii (P. rectifdius As. Benn. ) ex 



il IGSTB. I IS, 190. 



VdUei As. Benn. — 98. 



Voltei Pisch., Beitr. etc., in Mitt. bayer. Bot. Ges. etc. 



1904, 376. 185, 238. 



normali l i - , Pot. mim -c. c\^. I, 1894, n. 22: gramin. L., f. 

 nm vegit u II \<. i r, 177. 



notabil l o., II, 1897, n. 133: pectin. I-., f. 49. 



Notarisii G indoo. 58. 

 novaboracensii Moe., Revis. N. Am. Naj., in Bfem. 



Torr. bot. Club III: 2, 1893, 20-21: lonchitis 



Tuck., V. 

 Nova-Anglia Hagstr. — 120, 121. 

 numasakianus As. Benn., Notes etc. in I' Ann. Conserv. 



Geneve, 1905, 104. — 129. 

 Nnttallii Cham. & S< hl., De plantis etc., in Linntea, 



1827, 226. — 4, 121, 134. 135, 139, 140, 155. 170, 



189, 190, 200, 201, 262. 

 NuttaUii X gramineus (P. runrilius AB. BENN., Journ. 



of Bot. 1908, 250). 

 Oakesianus Robb. — ■ 196, 1!>7. 

 oblongijolius Ar. BENN., in Ber. Schw. boi. Ges., 1896, 



96: perfoliatus L., v. 

 oblongijolius Dum., Fl. belg. 1827, 163. — 256. 

 oblongijolius BOOEEE ]'., Handb. N. Zeal. Fl. 1862, 742 



(is P. Oheesemanii As. Benn. ex Benn.). 

 oblongo-rufescens Sciui.tz, in Flora, 1849, 230. — 148. 

 oblongus Schneeder, in Verb. bot. Ver. Biand., 1872, X 



(is P. gramin. L. v. ten ester Fu., ex Graebner). 

 oblongus SpeNNEE, Fl. frih. I, 1825, 32: perfol. L. f. 



— 256. 



oblongus Yiv. - 175, 180. 



obovatifolius TlS., an. FETES, in .lourn. of Bot.. 1891, 



289: nitens Web., f. 

 obrutus WOOD, ('lassbook, 1845, 176 (is P. alj>in. Balb., 



f., ex Robb., in GeaT's Man. 1S67, 4S6). 

 obseurus DC. 141, 143. 



obtusifolius FlEB., Pot. Bohm. 1838, 32: rrispus I... [ä. 



— 59, 61. 



obtnsifolius Mest. & Korn. 7, 20. 22. 56, 58, 84, 91, 



96, 97, 99, 105, 106, 109. 115 121, 205. 

 obtusif. X Friesii(P. semijiurtus As. Benn.) ap. Gsaeb- 



nee, Potam. in Engl., 1. C, 1907, 138). - 96. 

 obtusifol. X panormitauus il'. Sturrockii As. Benn.) 



ex HAGSTE. — 117. 

 obtusijal. X pusillus ex AxMQTJ. in Bot. Not., 1889, 66. 

 obtusifol. X i>usillus (P. saxonicus Hagsts.). - — 118. 

 obtusifol. X trichoides (/'. gallicus BlAGSTS). — 118. 

 obtusifolius MJETEE, Chlor. han., 1S36, 523: lurens L. f. 

 obtusior PlSCH., Bayer. Potam. etc. 1907, 101: murro- 



utitiis SCHS., f. 95. 



obtusus Dr Csoz ap. Gatjd., ). c, 1828, 468. 141. 



obtUSUS FlEB., 1. C, 3S: obtusifol. M. K., f. 

 oh/usus II LGSTS.: succicus K ui ii. 8. 20, 22. 



obtusus Hagsts.: nitens Wäb., f. 228, 230, 231. 



obtusus SCHLECHTEND., Pl. lierol. 1, 1S23, 117: coiujtressus 



L., v. (is obtusifolius M. & K: SchtjlT. Mani.). 

 orrideultdis GSAEBNEE, 1'olain. in EnGLES, I. e. 1907, 



91: uitriis \Vi:i:., £. 



occidentalis Robb., in Cing's Explor 10 Mer. U. B A . 



1871, 339: marinus L., v. Is. 19, 



occidentalis Siebeb. 184. 

 ochreatns B \<>n.. 10, 58, 79, 86. 

 octandrus Potbet ap. Lam., Ene. Snppl. IV. 1816, 534 

 ( - Hydrogeton Bpecies). 



octandrus ReICHENB. Iietl»., ev ÄS. BENN., in \nn. Nat. 



II. .t in. Wien, 1892, 288 (is jamnievs II\ — k. ex 

 Benn.). 131. 

 odontocarpus Gandoqeb in Hull. Soc. bot. Prance, 3, 



sur. VI, 1899, 393 (planta dubia), 





