I 



Vol. xiv. No. 5 -Botanical Gazette.-May, 



1889. 



Notes on North American Willows. IV. 



M. S. BEBB. 



i. Salix arctica Pallas. Flora Rossica, vol. I, pt. ii, p. 

 86. S. crassijulis Trev. ex Traut. Sal. frigid, p. 308. ,5. 

 dtplodictya Traut. 1. c. p. 307. S. Pattasii Anders. DC. 

 Prod., vol. 16, pt. ii, p. 285. 



S. Browxii. S. arctica R. Br. Bot. Ross Voy. 2 ed., 

 vol. 2, p. 194. Melv. Isl. PI. p. cclxx, 11 (not Pall.). Hook. 

 H. Bor.-Amer. ii, p. 152. Ledebour, Fl. Ross, ii, p. 86. 

 Icon. FL Ross. Tab. 460. Anders., DC. Prod., 16. 2. 286 

 (excl. var. nervosa). 



Salix arctica Pallas was published in 1788. The specie 

 is a very peculiar one, of striking features, easily recognized, 

 and the description given is graphic and wholly free from 

 ambiguity. In the Botany of Ross' Voyage, London, 1819, 

 Robert Brown printed in a list as a new species his S. arctica. 

 the description of which was published in the Ckloris Mel- 

 fmliana^ List of Plants collected in Melville Island undei 

 <~apt. Perry, London, 1823. The earlier S. arctica of Pallas 

 appears to have been unknown to Brown ; at any rate he 

 makes no reference to it. With the exception of Ledebour, 

 who misapprehended S. arctica Pall., and united with it as 

 a synonym S. arctica R. Br., the fact came to be recognized 



given to two distinct species. Both names continued to be 

 sustained, one by its manifest priority, the other by the pre- 

 ponderating authority of Robert Brown. The species were 

 distinguished in each instance by citing one author and ex- 

 cluding the other. Thus it was S. arctica PalL (not R. Br.) 

 or vice versa, S. arctica R. Br. (not Pall.) This state of 

 things continued unchanged down to the time when Anders- 

 son s revision of the entire genus for De Candolle's Prodromus 

 precipitated the suppression of one or the other of the two 

 flames. The older species now received the name of S. Pal- 

 asu And., and the authority of Pallas was carried over and 

 imposed upon S. arctica R. Br. S. arctica Pallas became 

 ' **<*tta$it tl. sp., and S. arctica R. Br. became S. arctica 



