SALICACEAE. — SALIX 109 



JAPAN. Hondo : prov. Sagami, " circa Hami prope Yokoska in locis inunda- 

 tis," L. Savatier (No. 2718, type of S. eriocarpa, ex Franchet & Savatier); Kama- 

 kura, April 6, 1880 (No. 11, ex Bot. Inst. Coll. Sci. Tokyo, type of S. dolichostyla, 

 ex von Seemen); prov. Mutsu, Aomori, in river valleys. May 6, 1898, U. Faurie 

 (Nos. 1259, 1260, co-types, ex von Seemen); "in plateis Aomori," May 1905, U. 

 Faurie (No. 6623; tree 7-8 m. tall; cf ). Shikoku : prov. Tosa, Nanokawa, April 



4, 1890, K. Watanabe (?). 



According to the description of the authors this species certainly is the same as 



5. dolichostyla Seemen, the type of which came from about the same region. It 

 must be very nearly related to *S'. jessoensis Seemen, and there is a 9 specimen be- 

 fore me from Sapporo, May 1892 (No. 51 ex Herb. Bot. Gard. Tokyo), which agrees 

 with this species in every respect but has two glands like S. eriocarpa. 



According to Lackschewitz (in Schedae Herb. Fl. Ross. VII. 107, No. 2255 

 [1911]). — Toepffer, Salicol. Mitt. No. 5, 236 [1912]), S. mixta Korshinsky (in Act. 

 Hort. Petrop. XII. 391 [1892]), is the same as S. dolichostyla Seemen. Having be- 

 fore me cf and 9 specimens collected bj^ Korshinsky " ad ostium Ussuri prope 

 Polowinnaja," May 16, 1891 (9) and on the middle Amur, May 5, 1891 (cf), I 

 agree with Lackschewitz that S. mixta is a very similar plant, although I have not 

 found a dorsal gland in the 9 flowers which according to Lackschewitz is not 

 always present; Korshinsky does not say anything about the glands. As it is 

 the case with other species, the dorsal gland of the 9 flowers may be sometimes 

 wanting. Further investigation of good specimens of all these species is needed to 

 prove whether they are connected with S. jessoensis Seemen and whether the sec- 

 tions Fragiles and Albae can be separated by the glands in the 9 flowers or not. 

 The ventral glands of the cf flowers of S. mixta Korshinsky are variously dentate 

 or lobulate in the specimen before me, and the dorsal gland is smaller and often 

 entire, while Lackschewitz says: "nectarium duplex, internum oblongum, externum 

 lineare." According to Komarov in Act. Hort. Petrop. XXII. 28 (Fl. Mansh.) 

 (1903) S. mixta is a hybrid between S. purpurea Linnaeus and S. viminalis Lin- 

 naeus, but this is certainly a mistake. Nakai (in Jour. Coll. Sci. Tokyo, XXXI. 

 215 [Fl. Kor. II.] [1911]) mentions S. mixta from Korea. 



There is another species of this section, Salix clegantissima K. Koch (in Wochen- 

 schr. Ver. Beford. Gartenb. Preuss. XIV. 380 [1871]; Dendr. II. pt. 2, 505 [1872]), 

 which is supposed to have been introduced into Europe from Japan. It may repre- 

 sent a hybrid between S. babylonica Linnaeus and S. hondoensis Koidzumi. Von 

 Seemen {Salic. Jap. 77 [1903]) believes S. elegantissima a hybrid between S. baby- 

 lonica and S.fragilis Linnaeus, like S. blanda Andersson (in Svensk. Vetcnsk. Akad. 

 Handl. VI. 50 [Monog. Salic] [1867]); and Wolf (1900) and I (1904) reached the 

 same conclusion. But in Ascherson & Graebner (Syn. Mitteleur. Fl. IV. 73 

 [1908]) Seemen places S. elegantissima in the sect. Fragiles without any other re- 

 marks than: " Vielleicht aus Japan stammend." See also S. lasiogyne Seemen, 

 p. 111. 



Sect. 7. ALBAE Borrer in Hooker, Brit. Fl. 418 (1830); in Loudon, Arb. 

 Brit. III. 1522 (1838). — Kerner in Verh. Zool.-Bot. Ges. Wien. X. 185 (1860).— 

 Seemen in Ascherson & Graebner, Syn. Mitteleur. Fl. IV. 78 (1908). 



Salix, sect. Subalbae Koidzumi in Tokyo Bot. Mag. XXVIl. 88 (1913), in 

 adnot. 



Vide sect. 6, ab ea praecipue differt petiolis semper eglandulosis, floribus femi- 

 neis glandula una ventrali instructis. 



