BETULACEAE. — ALNUS 501 



10. AInus formosana Makino in Tokyo Bat. Mag. XXVI. 390 (1912). 



Alnus maritima, var. japonica Kegel in De Candolle, Prodr. XVI. pt. 2, 

 186 (quoad pi. Formosanam) (1868). 



Alnus mariiima Henry in Trans. Asiat. Sac. Jap. XXIV. supj)!. 90 {List PL 

 Forinos.) (non Muhlenberg) (1896). 



Alnus mariiima, YSiT. formosana Burkill in Jour. L/inn,Soc.^X.\l. 500 (1809).— 

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

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

 {Enum. PL Formos.) (190G). — Hayata in Jour. ColL Sci. Tokyo, XXV. 199 

 {FL Mora. Formos.) (1910). 



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



Formosanam. 

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



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



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



CHINA, Formosa: without locality, 18G4, R. Oldham (No. 50S, type of 

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

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

 v. 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, bj' 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 EndUcher, Gen. Suppl. IV. 2, 20 (1847). — Kegel in Nouv. 

 Mem.Soc. Nat. Mosc. XIII. pt. 2, 140, t. 14, fig. 23-30 {Monog. Betnlac.) (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 BoL 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 Gr, Brit. & IreL IV. 954, t. 268, fig. 3 (1909). — CalUcr 

 apud Schneider, IlL 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. b6t. 2, XV. 202 (1841). — Cam- 



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

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



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

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

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

 locality (No. 955, Herb. Falconer). 



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

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

 See my remarks under section 2. 



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

 A. nitida) (1868). — Winkler in Engler, Pflanzenr. IV.-61, 108 (1904), excl. A. 



nitida. 



Clethropsis Spach in Ann. Sci. Nat s(5r. 2, XV. 201 (1841), excl. A. nitida. 

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



