BETULACEAE. — ALNUS 501 



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



Alnus viuritima, var. japonica Regel in De Candolle, Prodr. XVI. pt. 2, 



186 (quoad pi. Formosanam) (1868). 

 Alnus mariliina Henry in Trans. Asiat. Soc. Jap. XXIV. suppl. 90 {List PL 



Formos.) (non Muhlenberg) (1896). 

 Alnus maritima, var. formosana Burkill in /owr. Linn. Soc. XXVI. 500 (1899). — 



Matsumura in Jour. Coll. Sci. Tokyo, XVI. art. 5, 8 {Rev. Aln. Spec. 



Jap.) (1902). — Matsumura & Hayata in Jour. Coll. Sci. Tokyo, XXII. 391 



{Enum. PI. Formos.) (1906). — Hayata in Jour. Coll. Sci. Tokyo, XXV. 199 



{Fl. Mont. Formos.) (1910). 

 Alnus japonica Winkler in Engler, Pflanzenr. 1V.-61, 114 (1904), quoad pi. 



Formosanam. 

 Alnus japonica, var. formosana Callier in Fedde, Rep. Spec. Nov. X. 228 



(1911); apud Schneider, III. Handb. Laubholzk. II. 890, fig. 555 k (1912). — 



Matsumura, Ind. PI. Jap. II. 2, 18 (1912). 



CHINA. Formosa: without locality, 1864, R. Oldham (No. 508, type of 

 v&v. formosana Burkill; fruits); Tamsui, A. Henry (Nos. 1394 and 1732, Herb. 

 New York Bot. Gard.; flowering, autumn); in montibus Suitenka, June 28, 1903, 

 U. Faurie (No. 516; sterile); see also Matsumura and Hayata, 1. c. 



This species differs from A. japonica Siebold & Zuccarini in flowering in the 

 autumn like A. maritima Muhlenberg, which otherwise is easily distinguished by 

 the different leaves, by the smaller narrower petals of the male flowers and by 

 other characters. A. formosana is a subtropical species like A. nitida Endlicher. 



11. Alnus nitida Endlicher, Gen. Suppl. IV. 2, 20 (1847). — Regel in Nouv. 

 Mem. Soc. Nat. Mosc. XIll. pt. 2, 140, t. 14, fig. 23-30 {Monog. Betulac.) (1861); in 

 Bull. Soc. Nat. Mosc. XXXVIIl. pt. 2, 421 (1865); in De Candolle, Prodr. XVI. 

 pt. 2, 181 (1868). — K. Koch, Dendr. II. pt. 1, 624 (1872). — Brandis, Forest Fl. 

 Brit. Ind. 460, t. 57 (1874); Ind. Trees, 623 (1906). — Hooker f., Fl. Brit. Ind. V. 

 600 (1888); in Bot. Mag. CXXV. t. 7654 (1899). — Sargent, Silva N. Am. IX. 

 70, in adnot. (1896). — Collett, Fl. Siml. 473 (1902). — Gamble, Man. Ind. Timb. 

 670 (1902). — Winkler in Engler, Pflanzenr. IV.-61, 108 (1904). — Henry in 

 Elwes & Henry, Trees Or. Brit. & Irel. IV. 954, t. 268, fig. 3 (1909). — CalHer 

 apud Schneider, III. Handb. Laubholzk. II. 889, fig. 555 e-f, 556 a-c (1912). — 

 Bean, Trees & Shrubs Brit. Isl. I. 183 (1914). 



Clethropsis nitida Spach in Ann. Sci. Nat. s^r. 2, XV. 202 (1841). — Cam- 



bess^des in Jacquemont, Voy. IV. Bot. 159, t. 159 (1844). 

 Alnus sp. Stewart, Punjab PI. 197 (1869). 



INDIA. Western Temperate Himalaya: "Emodo," V. Jacquemont 

 (t>T3e, ex Spach); "secus rivulos circa Khoti," alt. 2000-2500 m., V. Jacquemont 

 (ex Cambessedes) ; Kunawur, "reg. temp. 5-7000 ped.," T. Thomson; without 

 locaUty (No. 955, Herb. Falconer). 



This species and A. nepalensis D. Don were referred by Spach to his genua 

 Clethropsis, although they are different except that both flower in the autumn. 

 See my remarks under section 2. 



Sect. 2. CLETHROPSIS Regel in De Candolle, Prodr. XVI. pt. 2, 181 (excl. 

 A. nitida) (1868). — Winkler in Engler, Pflanzenr. 1V.-61, 108 (1904), cxcl. A. 

 nitida. 



Clethropsis Spach in Ann. Sci. Nat. 86r. 2, XV. 201 (1841), excl. A. nitida. 

 Alnus, subgen. Clethropsis Endlicher, Gen. Suppl. IV. pt. 2, 20 (1847), excl. 



