BETULACEAE. — CORYLUS 445 



[1912]), because it was described as a tree by Farges (ex Franchet) and because the 

 involucres are without the setose bristly hairs which are always present in those 

 of C. mandshurica Maximowicz and C rostrata Aiton. According to the figure 

 of a fruit published by Winkler, this plant much resembles the specimens collected 

 by Wilson not far from the region where the type had been found. The leaves, 

 however, are described as much narrower, obovate or oblong than those on the 

 specimens before me. Nevertheless, 1 have little doubt that C. Fargesii is much 

 more nearly related to C. chinensis than to the species with setose involucres, and 

 it may turn out to be a mere variety of the common Tree Hazel of central China, 

 the leaves of which are very unsymmetrical at their base, as they are said to be 

 in C. Fargesiij while in C Sieboldiana Blume they are usually symmetrical. 



Corylus chinensis occurs sparingly on the mountains throughout western Hupeh 

 and Szeeh'uan, but is very rare in the western part of the last-named province. It 

 forms a magnificent tree, from 25 to 40 m. tall with a trunk from 2 to 5 m. in girth. 

 The main branches spread almost horizontally and the outline of the croum is 

 broadly oval. Pictures of this tree will be found under Nos. 316, 509 and 0122 of 

 the collection of my photographs and also in my Vegetation of Western China, 

 Nos. 172, 173. E. H. W. 



Corylus heterophylla Fischerj var. sutchuenensis Franchet in Jour, 

 de BoL XIII. 199 (1899). — Burkill in Jour, Linn. Soc, XXVI. 504 

 (1899). — Diels in BoL Jahrb, XXIX. 280 (1900). — Winkler in Engler, 

 Pjlanzenr. IV.-61,48(var. sutchuensis) (1904).— Schneider, 7W. Handb. 

 Lauhholzh II. 896 (1912). 



Corylus heterophylla, var. Crista-galli Burkill in Jour. Linn. Soc. XXVI. 504 

 (1899). — Diels in BoL Jahrb. XXIX. 280 (1900). — Winkler in Engler, 

 Pflanzenr. IV.-61, 50 (1904). — Schneider, III Ilandh. Lauhholzk. II. 896 

 (1912). 



Corylus heterophylla Pampanini in Nuov. Giorn. BoL Ital. n. ser. XVII. 250 

 (non Fischer) (1910). 



Western Szech'uan: west and near Wen-ch'uan Hsien, thick- 

 ets, alt. 1800-2200 m., September 1908 (No. 1149; bush 1.8-3 m. tall; 

 vrhh ripe fruits, leaves beneath pubescent only on the rib and veins, 

 branchlets and petioles sparsely pubescent; involucres deeply cleft, 

 shorter than the very fine pubescent nutlets); same locality, July 

 1908 (No. 2276; bush 2.4 m. tall; almost ripe fruits identical with 

 those of typical C. heterophylla, anthers yellowish ?); same locality, 

 alt.^ 2400-2900 m., October 1910 (No. 4551; bush 1.8-4 m. tall; ripe 

 fruits, same form as No. 1149); Tachien-lu, forming scrub, alt. 2400- 

 3100 m., July and September 1908 (No. 2283; bush 0.9-2.4 m. tall; 

 young and almost ripe fruits like No. 2276, pubescence of leaves and 

 petioles similar to var. yunnanensis, anthers yellowish ?) ; same locaUty, 

 thickets, alt. 2400-2700 m.; September 1910 (No. 4552; ripe fruits and 

 pubescence as in No. 2283, or involucres more like those of var. Cmto- 

 ffaHitype); Tsaku-Iao, Wei-kuan,Tachai-tzu, August, 1891,4. r.iZos^^orn 



