A LIST OF BRITISH WILLOWS. 265 



The following is a list of the principal forms under which it 

 appears in various works : — 



Potamogeton lucens /?. fol. angustioribus, Pohl. FI. Boh. 1810, p. 157. 

 P. lucens V. nitem (Willd. sp. !) Cham, in Ad. Fl. Berol. p. 6, 1815. 

 ? P. Ulceus V. aiu/usti folium Gray, Nat. Arr. Brit. PL 1821, p. 34. 

 P. anr/ustifolius Berch. et Presl. Kostlin, p. 19 (1821 ?), 1823. 

 P. mifjustifolius Opiz, Boh. Gew. p. 23, 1823. 

 *P. heterophyllus latifoliiis Mert. & Koch, Ecihliug's Deut. Fl. 1823, 



i. p. 845. 

 P. heterojihyllus ft. fluviatlHs Schlecht. Flora Berol. p. 116, 1823. 

 P. Proteus Zizii Cham. et. Sch. Linnea, 2, p. 201, 1827. 

 P. Zizii Both, Enum. Plant. Germ. 1, p. 531, 1827. 

 P. luce^is V. heterophyllus Fries, Nov. Fl. Suec. ed. 2, p. 34, 1828. 

 P. yramineus v. platyphyllus Meyer, Ch. Hann. p. 520, 1836. 

 P. (jramineus v. Zizii Koch, Syn. Fl. G. et Helv. ed. 2, p. 778, 1844. 

 P. lanceolatus Wolf, (et Gorski) ap Reich. Fl. Ic. G. et Helv. vol. vii. 



1845. 

 P. heterophyllus v. Zizii Boreau, Fl. Cent. Fr. ed. 3, p. 600, 1857. 

 P. lucens^ /3. anciustifolius Blytt, Norges Fl. p. 365, 1861. 

 P. lucens V. Zizii Ascherson, Fl. Brandenb. p. 660, 1864. 

 P. rufescens Pesn. ! ex Lloyd, Fl. Quest. Fr. p. 293, 1876. 

 P. lucens V. Zizii Blytt, Norges Fl. Supp. p. 1277, 1877. 

 P. Zizii C. & S. ; Baker, Rep. Ex. Club for 1878, p. 19. 

 P. Zizii Boreau ; Lees, Record Club Rep. for 1878. 

 P. lucens subsp. Zizii M. et K. ; Nyman, Consp. Fl. Earop. p. 682, 



1882. 

 P. lucens subsp. Zizii Hook. f. Stud. Fl. ed. 3, p. 433, 1884. 

 P. hicens v. minor Nolte in Hansen's Exsicc. No. 521. 

 P. serratus L. Sp. PL ; Nolte in Hansen's Exsicc. No. 1114 (Herb. 



Mus. Brit. !). 



A LIST OF BRITISH WILLOWS. 



By F. Buchanan White, M.D., F.L.S. 



The following list shows the arrangement of our Willows which 

 I proposed in a paper read before the Linnean Society on June 6th :^ 



A. Pleiandr^. 

 1. Triandrce. 



1. Salix triandra L. 



X S. decipiens Iloffm. (triandra x fragilis). 

 X S. undulata P'Jirh. (triandra x viminalis). 



2. Pentandra. 



2. S. pentandra L. 



X S. cuspidata Schultz (pentandra x fragilis). 

 X S. hexandra Ehrh. (pentandra x alba). 



* I am indebted to Dr. Schumann, of Berlin, for the exact date of Eohling's 

 Deut. Flora. 



