496 WILSON EXPEDITION TO CHINA 



JAPAN. Hondo: "in monte Gurvassan," September 28, 1897, U. Faiirie 

 (No. 783 ; type of the two species and the variety mentioned above; ex auctoribus) ; 

 prov. Sliinano, Mt. Togakushi, rare, July 15, 1908 (ex Herb. Sakurai; young 

 fruits) . 



This species is well distinguished by its obovate leaves, which are emarginate or 

 truncate at the apex. They resemble those of the following species, but their ser- 

 ration is crenate. 



7. Alnus serrulatoides CalHer in Fedde, Rep. Spec. Nov. X. 229 (1911); apud 

 Schneider, III. Handb. Laubholzk. 11. 890, fig. 556 g-i, 557 a-b (1912). 



Alnus glutinosa Miquel in Ann. Mus. Lugd.-Bat. II. 137 (non Linnaeus) (1865) ; 

 Prol. Fl. Jap. 69 (1866). 



Alnus 7naritima, var. obtusata Franchet & Savatier, Enum. PI. Jap. I. 458 (no- 

 men nudum) (1875); II. 502 (1879). 



Alnus glutinosa, var. japonica Matsumura in Jour. Coll. Sci. Tokyo, XVI. pt. 2, 

 art. 5, 9 (1902). — Shirasawa, Icon. Ess. For. Jap. II. t. 13, fig. 13-21 (1908). 



Alnus glutinosa, var. obtusata Winkler in Engler, Pflanzenr. IV.-61, 118 

 (1904). — Matsumura, Ind. PI. Jap. II. pt. 2, 17 (1912). 



Alnus obtusata Makino in Tokyo Bot. Mag. XXVI. 390 (1912). 



JAPAN. Hondo: prov. Sliinano, Nakatsu-gawa, Nojiri, September 6, 1905, 

 J. G. Jack (fruits); same prov., Adera, September 5, 1905, J. G. Jack (sterile); 

 prov. Mino, on Nakatsu-gawa, July 27, 1911 (ex Herb. Sakurai; young fruits); 

 prov. Yamato, July 14 (ex Herb. Coll. Sci. Univ. Jap.; fruits). Shikoku : prov. 

 Tosa, Oti, November 24, 1887, K. Watanabe (young aments). For further speci- 

 mens see Matsumura, 1. c. 



This is a well-marked species with its finely serrate, obovate, obtuse leaves. 



There is a flowering specimen collected by Wilson, Higashi-Kirishima, Kyushu, 

 March 8, 1914 (No. 6208; tree 5-15 m. tall, girth 0.3-0.9 m., bark smooth, gray, 

 male flowers reddish brown), representing a form which according to Wilson is 

 " common in forests." The male flowers are very similar to those of A. japonica, 

 but the female aments are mostly without any bractlike scales at their base, which 

 seem always to be present in the other forms of this species. They stand round the 

 base of the flowering female catkins 6 (or more ?) in number, somewhat like a 

 loose sheath, or in two distinct more or less opposite groups, and in shape are lan- 

 ceolate or ovate-lanceolate. Their texture is firm, and the middle bract of each 

 group is mostly the longest. The peduncles are stouter and nearly as thick as the 

 catkins, while in No. 6208 they are somewhat more slender. If there are 2 or 3 scales 

 at the base of the female catkins of No. 620S, they are of the same shape as the 

 flower bract and can be easily overlooked. Unfortvmately there is neither male 

 nor female flowering material of A. serrulatoides in the collections before me, nor does 

 Shirasawa publish a drawing of them. I suspect that Wilson's specimen may 

 belong to our species, but it is impossible to decide this without having seen leaves 

 and good fruits from the same locality. One of Wilson's specimens has several old 

 fruits which resemble those of A. japonica more than those of A. serrulatoides. 



8. Alnus hirsuta Turczaninow in Bull. Soc. Nat. Mosc. XI. 101 {Cat. PI. Baical.) 

 (nomen nudum) (1838); fide Ruprecht^ in Bull. Acad. Sci. St. Petersbourg, XV. 376 

 (1857); in Mel. Biol. II. 558 (1858). — Maack, nymem. AMijp. pt. 2, 87 (1859). 



^ There is no description of A. hirsuta, but Ruprecht refers to " Maxim. Amur. 

 No. 42," 1. c. 139 (1856), where Maximowicz cites A. incana, ^ hirsuta in Fl. Ochot. 

 which is the same as A. incana, var. hirsuta of Ledebour and of Spach. 



