BETULACEAE. 



Determined by Camillo Schneider. 



OSTRYOPSIS Decne. 



1. Ostryopsis Davidiana Decaisne in Bull. Soc. Bot. France, XX. 155 

 (1873). — Hance in Jour. Bot. XIII. 137 (1875). — Lavallee, Arh. 

 Segrez. 5, t. 3 (1880). — Maximo wicz in Mel. Biol. XI. 316 (1881); in 

 Bull. Acad. Sci. St. Petersbourg, XXVII. 535 (1882). — Dippel, Handb. 

 Laubhohk. II. 136, fig. 65 (1892). — Palibin in Act. Hort. Petrop. XIV. 

 140 (1895). — Burkill in Jour. Linn. Soc. XXVI. 502 (1899).— 

 Schneider, III. Handb. Laubholzk. I. 143, fig. 75 f-n, 76 s (1904). — 

 Winkler in Engler, Pflanzenr. IV.-61, 20, fig. 5 (1904). — Bean, Trees 

 & Shrubs Brit. Isl. II. 116 (1914). 



Corylus Davidiana Baillon, Hist. PI. VI. 224, fig. 174 (1877). — Franchct in 

 Nouv. Arch. Mus. Paris, s6r. 2, VII. 88 {PI. David. I. 278) (1884). 



Western Szech'uan: Mao-chou, cliffs and dry places, Min River 

 valley, alt. 1800-2300 m., August 28, 1910 (No. 4470; bush 1.2-3 m. 

 tall; fruits). Chili : Hsiao Wu-tai-shan, alt. 1600 m., August 8, 1913, 

 F. N. Meyer (No. 1125; fruits); Cal-ceen-wong, 1910, W. Purdom (No. 

 69; fruits); Jehol, A. David (No. 1694; type, ex Decaisne). 



Here may be added notes on two Ostryopsis of which I have not seen specimens : 



Ostryopsis Davidiana, var. cinerascens Franchet in Bull. Soc. Bot. France, 

 XXXII. 27 (1885). — Burkill in Jour. Linn. Soc. XXVI. 503 (1899). 



Yunnan: "in coUibus calcareis ad Mosoyn prope Lankong," June 1, 1884, 

 A. Delavay (No. 37, type, ex Franchet; No. 830, ex Burkill). 



This variety is said to differ from the type in its broader ovate-rotundate leaves, 

 which are more thickly covered beneath with a shining silky pubescence. The 

 branchlets also are more pilose and glandular. It is said to be a very small bush, 

 0.6 m. high. Winkler (in Engler, Pflanzenr. 1V.-61. 20 [1904]) does not mention 

 this variety, but cites under the type a specimen from Yunnan, A. Delavay (No. 

 lOGG), without any special locahty. 



2. Ostryopsis nobilis Balfour & Smith in Not. Bot. Gard. Edinburgh, VIII. 194 

 (1914). 



Yunnan : in open thickets on the mountains to the northeast of the Yangtsze 

 Bend, lat. 27° 45' N., alt. 3100-3400 m., June 1913, G. Forrest (No. 10343, type; 

 shrub 2-4 m.; fruits). 



Tliis interesting species according to the authors differs from 0. Davidiana De- 

 caisne by its much larger leaves (6-12 cm. long, 5-10 cm. broad), which are covered 



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