BETUIiACEAE. — BETULA 467 



in the characters mentioned in the key and seems to have a different geographical 

 distribution. 



The oldest name for B. cylindrostachya is perhaps B. nitida D. Don {Prodr. 

 Fl. Nepal. 58 [1825]), the type of which was collected by Kamrup in Sirinagur. 

 I have not seen the type, but only a part of Wallich's No. 2795, collected by R. Rlmk- 

 worth in Kumaon which apparently represents the type of Lindley's B. nitida in 

 Wallich {Ico?i. Plant. As. Rar. II. 7 [1831]). This specimen of Blinkworth can 

 hardly be separated from B. cylindrostachya. According to Lindley B, nitida 

 is " omnino inter B. acuminalam et B. cylindrostachyam media." Spach (in 

 Ann. Sci. Nat.j ser. 2, XV. 200 [1841]), describes B. nitida as Betulaster nitida^ 

 and he adds, 1. c. 199, another species under the name of Betulaster ajjinis {Bctula 

 ajfiuis Endlicher, Gen. Suppl. IV. 20 [1847]), which according to his description 

 seems to be only B. cylindrostachya Wallich. Regel mentions this form first as B. 

 nitida, var. affmis Regel (in Nouv. Mem. Soc. Nat. Mosc. XIII. 130 [Monog. Beiulac. 

 72] [1861]), but later (in De Candolle, Prodr. XVI. pt. 2, 180 [1868]) he placed it 

 under the doubtful species with B. nitida D. Don. Winkler made the same dis- 

 position of it (in Engler, Pflanzenr. IV.-^l, 95 [1904]). 



3. Betula alnoides Hamilton apud D. Don, Prodr. Fl. Nepal 58 (1825).— 

 Hooker f., Fl. Brit. Ind. V. 599 (pro parte) (1888). — Burkill in Jour. Linn. Soc. 

 XXVI. 497 (excl. specim. Farges et var.) (1899). — Gamble,^ Man. Indian Timh. 

 ed. 2, 669 (1902). — Brandis, Ind. Trees, 622 (pro parte) (1906).— Schneider, III 

 Handb. Laubholzk. II. 882, fig. 552 g, 553 e-f (1912). 



Betula acuminata Wallich, Icon. PL As. Rar. 7, 109 (1831). — Regel in Bull 



Soc. Nat. Mosc. XXXVIII. pt. 2, 418 (1865); in De Candolle, Prodr. XVI. 



pt. 2, 178 (1868). — Brandis, Forest Fl. Brit. Ind. 458, t. 46 (descript. 



tantum pro parte) (1874). — Franchet in Jour, de Bot. XIII. 207 (excl. 



specim. Fargesii et var.) (1899). 

 Betulaster acuminata Spach in Ann. Sci. Nat. s^r. 2, XV. 199 (1841). 

 Betula acuminata^ var. a glabra, ^ pilosa, y arguta, f lancifolia Regel in Nouv. 



Mem. Soc. Nat. Mosc. XIII. pt. 2, 129, 130 (Monog. Betulac. 71, 72), t. 6, fig. 



29-31, t. 13, fig. 29 (1861). 

 Betula cylindrostachys , var. ^ pilosa et y subglabra Regel in De Candolle, Prodr, 



XVI. pt. 2, 189 (1868). 

 Betula alnoides, var. acuminata Winlder in Engler, Pflanzenr. IV .-61, 89, 



fig. 22 A-C (1904). 



CHINA. Yunnan: JMengtsze, alt. 1400 m., 1898, A. Henry (No. 11387 ; tree 

 10m. tall; fruits); IMengtsze, forests to southeast, alt. 1500 m., 1898, A.TTenry (No. 

 10437''; tree 13 m. tall; fruits); Mengtsze, mountain forests to southeast, alt. 

 1800 m., A. Henry (No. 10437; tree 10 m. tall; sterile); Szemao, mountains to the 

 south, alt. 1500 m., January 9, A. Henry (No. 12869 ; tree 10 m. tall; flowers; No. 

 12809^; tree 7 m. tall; flowers; No. 12869^ ; fruits^" 



INDIA. Nepal: "insylvisad Narainhetty," F. Hamilton (ex D.Don; t}T)e of 

 B. alnoides); without locality, N. Wallich (No. 2793; type of B, acuminata). 

 East Bengal : Mt. Sillet (Silhet), H. Bruce (ex Wallich, No. 2793 var./S, apparently 

 only in part); without locality (Herb. Griffith, No. 4486). 



^ Gamble, 1. c, mentions d, Betula spec. (B . cylindrostachys Gamble, List Trees 

 Darjeel. 79 [non Wallich] [1878]) from Sikkim, Darjeeling Hills from the Terai up 

 w) 2000 m,, which differs from B. alnoides in the color of bark and in the 

 anatomical characters of the wood. As the author says nothing about the leaves, 

 fruits, etc., this Birch needs further investigation. 



