266 



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



Bennettii Fryer (a-isp. X obtusif. ex Fryer). — 63, 64. 

 BercMoldi Fieb. — 97, 118, 119, 121, 122, 124, 125. 

 beroUnensis AscH. & Gr. {lucens X prwl., var. ex AsCH. 



& Gr.). — 215, 247. 

 Berteroanus Phil. — 81, 108, 110, 111, 114. 

 Besseri Steud. — 184. 

 bif alius Lapeyrouse, Hist, abregee des pi. des Pyr., 



Suppl. 1818, 27 (= Vicia faba). 

 biformis Hagstr. — 247. 

 BiUotii ScilDLTZ. — 184; 188. 

 BUlupsii Fryer (P. coriaceus X plantag. ex Fryer). 



— 12, 181. 



borealis Hagstr. — 95, 96. 



borealis L^eST., Beskrifning etc. in K. Sv. Vet. Ak. H. 

 1824, 162: gramin. L. a (= prwlongns Wulp. ). 



— 250—252. 



borealis Raf. in Med. Reposit. 1808, 354; 1811, 409 ( = 

 jiliformis Pers., or possibly pectinatus L., or both). 



— 14. 



borealis Tis., 1. c, 1, 1894, n. 16. — 143. 



bottnicus Hagstr. {pectin. X vaginatus). — 52. 



brarhypus Hagstr. — 46. 



bracliypus Kern. ap. Fischer, Bayer. Pot. 1907, 115: 



pus. L., f. 

 brasiliensis Ar. Benn. ap. Graebn. in Engl., 1. c, 79: 



lucens L., subsp. 

 brasiliensis Ar. Benn., New Pot., in Jouni. of Bot. 1910, 



150. — 198. 

 brevifolius Celak. Eesultate etc. in Sitzber. bolim. Ges. 



Wissensch., 1887, 36. — 251. 

 brevifolius PisCH., Bayer. Pot., 1907, 54: flwiians Rth, 



f. — 188. 

 brevifolius Fiscii., 1. c, 115: pusillus L., f. — 124. 

 brevifolius Flscii., I. c, 45: alpinus Balb., f. — 143. 

 brevifolius Hagstr. — 244. 

 brevifolius Meyer, Clil. Han. 1836, 525: pusillus L., 



var. — 124. 

 brevifolius Nolte ap. Ar. Benn., Notes etc. in Bull. 



I'Herb. Boiss. 1896, 547: pus. L. var. (without 



descr. ). 

 brevifolius Tis., 1. c. Ill, 1897, n. 136. — 143. 

 brevior Hagstr. — 224, 229—230. 

 brevipes Hagstr. {fennicus Hagstr. f.) — 25. 

 brevipes Hagstr. {nitens Web. f.). — 225, 226, 228. 

 brevirostris Hagstr. — 124. 

 breviusculus Hagstr. — 78. 

 Brotherstonii Ar. Benn. ap. Lint., Hybrids etc. in Journ. 



of Bot. 1907, 300: decipiens X niiens. 

 bnpleuroldes Pernald. — 252, 258, 259. 

 bupleuroides X gramineus {P. subnitens Hagstr.). — 259. 

 bupleuroides X pusillus(P.mysticus'MoB.. ) ex Fern. — 259. 

 bupleuroides X Bichardsonii f, ex Hagstr. — 259. 

 cwspitosus FiscH., Bayer. Pot. 1907, 115: ptis. L., f. 

 cws2ntosus M. & K. ap. Schultes, Mant. etc. 1827, 364; 



pect. L. var. 

 ccBspitosus, Nolte. — 92. 

 caUfornicus MoR. — 90, 91. 

 canadensis Hagstr. — 36, 51. 

 canariensis Ddr. & ScHiNZ.Consp. Fl. Afr. V, 1895, 49: 



tiatans L., v. 



canariensis Link. — 184. 



caneellatus Fryer. — 17 S. 



capensis Scheele. — 1S3, 203, 204. 



capillaceus Moerck. — 14. 



capillaceus Poir. — 138. 



capillaris Fiscii., 1. c. 120. — 76. 



capillaris Gaud., Fl. helv. I, 1828, 479: pus. L. var. p. 



capitatus Ar. Benn., Notes etc. in Journ. of Bot. 1901, 

 201: pus. L., var. — 124, 120. 



caridfolius Willd. — 39. 



carinaius Kupffer. — 65. 



Casparyi Kohts, Vh. Pot. Casp. in Osterr. Bot. Zeitschr. 

 1870. 289—292 (A dubious form; by some auth. con- 

 sidered to be pure P. (dp. Bale., in the favour of 

 which view the descr. of the fruit seems to speak. ) 



caudatus ,Seidl. — 233. 



caudiformis AsCH. & Gr., .Synopsis niitteleur. Fl. 1, 

 1897, 314. — 256. 



cayngensls Hagstr. — 140. 



cayugensis WiEG., Some Varr. of Pot. etc. in Eliodora, 

 1900, 102: NuttaUii Ch. & Schl. v. — 140. 



Chamissoi Ar. Benn. — 57, 204. 



Champlainii Ar. Benn. {alp. X pensylvanicus). — 200. 



Cheesemaiiii Ar. Benn. — 7, 157, 158, 165, 167, 169, 172 

 —175. 



Claytonii Tuck. — 121, 139, 200. 



Claytonii X rufescens {alpinus)'! ex Ar. Benn., Notes 

 in Journ. of Bot., 1890, 301; 1901, 199. — 200. 



Claytonii X Zizii ex Ar. Benn., 1. c, 1904, 71 {seeepihy- 

 drum. X angustifol. ). 



cognatus AsCH. & Gr. (perfol. X prcelongus). — 257. 



coloratns Vahl. — 67, 150, 175—178, 180—182. 



color. X gramineus {P. BUlupsii Fryer p. p.) ex Hagstr. 

 — 181. 



coloratus X polygonifolius {P. anglicus Hagstr.). — 180. 



coloratus X Zizii ex Fryer. — 12. 



communis Hagstr. — 214, 215. 



comparandus Tis., Pot. suec. exs. Ill, 1897, n. 141: 

 nitens Web.?, f. 



complanatus Willd. — 65. 



compressus L. (ex Oeder Fl. Dan. 1765, t. 203 = m.u- 

 cronaius Schr. A great many authors follow 

 this work: SciiuM., Enum., Eng. Bot., t. 418, Spen- 

 NER, Fl. frib., Hartman, 1820, Mert. & Koch, 

 1823, Ddmortier, Fl. belg., Gaudin, PI. helv., 

 Fieber 1838, Reichenb., Icones etc. 1845, and 

 others. — Roth, Tent. fl. germ. 1, 1788, miderstands 

 P. obtusifol. M. & K. by compressus L. This view 

 is also entertained by AVilldenow, Berl. Mag., 

 Liljeblad, Utkast etc., Chamisso, Adn., and 

 Wahlenb., Fl. ups. and FJ. suec. — A third view is 

 the one re'presented by E. Fries, Nov. 1828, and fol- 

 lowed by Koch, Syn., 1844, v. den Bosch, 1851, 

 Blytt 1861 and 1902, Grenier, 1855, Ascherson, 

 1864, Asch. & Gr. 1897, Wolfarth in Koch's Syn. 

 1904, Graebner, 1913, Fischer 1907 (a little 

 liesitating), RouY, Fl. Fr., and otliers. — In Lam. 

 & DC, Fl. Fr., lastly, the name lias a rather vague 

 meaning. — The name has been rejected(not used)by 

 NoLTE, Nov. , 1 820, SoNDER, Fl. hamb. 1 85 1 , Robbins , 



