160 WILSON EXPEDITION TO CHINA 
I unite under S. opaca the following specimens without making an attempt to 
decide whether this species is a hybrid between S. viminalis Linnaeus and S. Caprea 
Linnaeus or whether some of the specimens mentioned represent hybrids of a differ- 
ent origin. j 
NORTHEASTERN ASIA. Amur: without locality, C. Mazimowicz (c? and 
9); Saghalien: Toyohara, moorlands, side of streams, abundant, August 3 ,1914, 
E. H. Wilson (No. 7334; bush 1.8-3 m. tall; sterile); same locality and date, E. 
H. Wilson (No. 7344; bush 1.8-6 m. tall; sterile, looks like S. Caprea X S. sachali- 
nensis); Dui, along the river, beginning of June, 1860, P. von Glehn (type of S. 
opaca, with fruits; ex Schmidt). 
JAPAN. Hokkaido: prov. Ishikari, Sapporo, April and September, 1877, 
Watase (c^, 9 and sterile); same locality, April 21, 1890, May 26, 1890, Y. Toku- 
buchi (c? and with fruits; partly as S. sachalinensis, partly as S. stipularis); same 
locality, October 15, 1890, April 21 and 26, 1891, May 2, 1891, Y. Tokubuchi 
(d, 9 and sterile; partly as S. stipularis); same locality, May 27 and August 
11, 1891, Y. Tokubuchi (with fruits and sterile; as S. sachalinensis); same locality, 
April and July 1893, Y. Tokubuchi (9 and with fruit; as S. sachalinensis); 
same locality, September 17, 1892, C. S. Sargent (tree 7-10 m. tall, girth 0.3 m. 
sterile); same locality, * secus aquas," June 12, 1908, U. Faurie (No. 260; 
with fruits); same locality, May 31, 1903, S. Arimoto (9; as S. sachalinensis); 
same locality, H. Shirasawa (sterile); Maruyama, May 7, 1892, Miura (d 
and 9; as S. sachalinensis); prov. Oshima, near Mori, September 13, 1892, 
C. S. Sargent (small tree; sterile), Hondo: prov. Rikuzen, Sendai, August 27, 
1905, J. G. Jack (sterile); prov. Shimotsuke, Nikko to Lake Chuzenji, road- 
side, October 25, 1905, J. G. Jack (sterile); Lake Chuzenji to Lake Yumoto, August 
11, 1905, J. G. Jack (sterile); shores of Lake Yumoto, September 6, 1892, C. S 
Sargent (sterile); Nikko, June and October 2 (Nos. 88, 89 ex Herb. Tokyo; sterile); 
prov. Shinano, on Tsubakura-dake, side of torrents, common, alt. 1600 m., E. H. 
Wilson (No. 7499; small tree 4.5-7 m. tall; sterile, looks like S. viminalis X S. 
Caprea); Kanogawa, 1862, C. Marimowicz (No. 5; 9 type of von Seemen); prov. 
Musashi, Toda, April 14, July 22, 1913 (9 and sterile; looks like S. viminalis xX S. 
purpurea); Tokyo, Meguro, April 1910, H. Shirasawa (9 and sterile) ; prov. oe 
near Gotemba, side of streams, April 14, 1914, E. H. Wilson (No. 6456; bush 18-2. 
m. tall; 9, looks like a hybrid with S. purpurea). Shikoku: prov. Tosa, Nano- 
kawa, April 3 and May 20, 1888, K. Watanabe (9 and sterile). : 
Very nearly related to S. opaca seems also S. aequitriens Seemen (Salic. Jap. 10, 
t. 15, fig. E-G [1903]), from Hokkaido, prov. Ishikari, Sapporo, May 1892, Y. Toku- 
buchi (type; 9), which is only known from young flowering branchlets. The pe’ 
and the style are both as long as the ovary; the stigmas are linear and bifid; the 
gland is oval and only 14 the length of the pedicel. 
146. Salix Siuzevii Seemen in Fedde, Rep. Spec. Nov. V. 17 (1908), apud Siuzev 
in Trav. Mus. Bot. Acad. Sci. St. Pétersbourg, IX. No. 2 (1912) ex Toepffer, Salico* 
Mitt. No. 5, 248 (1912). — Wolf in Act. Hort. Petrop. XXVIII. 527 (1911). P 
NORTHEASTERN ASIA. Ussuri: Nikolsk Ussuriiski, April 29, 1905, £- 
V. Siuzev (No. 34, type, 9, ex von Seemen). Maritime Prov.: Sachoba river, 
1906, Palichevsky (c? and 9, ex Wolf). ST 
Von Seemen states that this Willow belongs to sect. Viminales and is most n! y 
related to S. opaca Andersson, differing from it especially by the shorter and nar- 
rower gland and by the shorter entire style. According to the description = 
pedicel is as long or even longer than the capsule, the style only 14 the length; 
the stigmas are short and thin; the lanceolate leaves are grayish green beneath 
and are up to 13 cm. long and 2 cm. broad. 
