488 WILSON EXPEDITION TO CHINA 



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Here may be added a very incompletely known species from Kamtchatka, B, 

 avatshensis Komarov (in Fcdde, Rep. Spec. Nov. XIII. 166 [1914]), which was 

 collected by the author " in valle fl. Kalachtyrka non procul ab oppido Petro- 

 pavlosk ad medium Octobri mensis 1909." It has pendulous catkins which are 

 about 2 cm. long and 0.8 cm. thick, and very short-petiolate bracts with lobes 

 divided almost to the base. According to the author it may represent a hybrid 

 between B. japonica Siebold and B. Ermanii Chamisso. 



ALNUS L. 



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Alnus cremastogyne Burkill in Jour, Linn, Soc. XXVI. 409 (1899). 

 Diels in BoL Jahrb, XXIX. 282 (1900) . — Winkler in Engler, Pfianzenr. 

 IV.-61, 127, fig. 28 (1904); in BoL Jahrh, XXXVI. Beibl. LXXXII. 

 33 (1905). — Callier apud Schneider, III Handb. Lauhhohk. II. 891 

 (1912). — Bean in Kew Bull Misc, Inform. XXVI. 164, t. (1913); 

 Trees & Shrubs Brit Isl I. 179 (1914). 



Western Szech'uan: without precise locality, abundant, side of 

 streams, etc., np to alt. 1400 m., October-November 1908 (No. 1388; 

 tree 10-40 m. tall, girth 0.6-3.6 m.; with ripe fruits and bark); same 

 region, July 1908 (No. 1388*; flowers); same 'region, October 1908 

 (No. 1388^*; unripe fruits); southeast of Tachien-lu, alt. 1400 m., 

 October 1908 (No. 1388^; bark from tree 30 m. tall, girth 4.5 m.); 

 near Wa-shan, alt. 900-1600 m., side of streams, July 1908 (No. 2030; 

 tree 13-20 m. tall, girth 1.5-2.1 m.; flowers); without locality, alt. 

 300-1200 m., abundant, October 1903 (Veitch Exped. No. 4497; tree 

 7-13 m. tall; with ripe fruits) ; without locality, A. Henry (No. 8890, 

 type; young fruits); Tacliien-lu, A. E, Pratt (No. 424, ex Burkill); 

 Mt. Omei, H, Scallan (Nos. 2334, 2335 Herb. Gu-aldi, ex Winkler). 



This Alder is very common in the valley of the Min River from near its inoutn 

 and northward and westward, but in the valley of the Yangtsze River itself it 

 does not occur east of the city of Sui Fu. In north-central Szech'uan it extends 

 from the prefecture of Paoning westward to the neighborhood of Tachien-lu. m 

 the shingly beds of streams it makes pure growths and up to 1500 m. altitude is 

 everywhere abundant in extreme western Szech'uan. On the Chengtu Plain it i3 

 largely planted by the side of rice fields, streams and irrigation canals and is one 

 of the principal sources of fuel. It is a tree from 20 to 30 m. and occasionally mor 

 tall, and has a straight trunk from 2 to 3.5 m. in girth clothed with gray rou&n 

 bark; the branches are rather slender and spreading. The wood is of very mt 

 value except as fuel, but is employed for making the small boxes used ^ .^'^*'f^ 

 China for transporting silver ingots. Colloquially the tree is known as ^^^^'^ * 

 Pictures will be found under Nos. 56, 70, 295 and 378 and also in my Vegemi<^ 

 0/ Western China, Nos. 9, 122, 123, 124 and 125. E. H. W. 



AInus lanata Duthie apud Bean in Kew Bull Misc, Inform, 1913, 

 164. — Bean, Trees & Shrubs BriL Isl I, 180 (1914). 

 Ad descriptionem vaide incompletam addenda v. emendan 



