ROSACEAE. — SORBUS 481 



No. IV. 46 (1870). — Hedlund in Kongl. Svenska Vetensk.-Akad. Ilandl. XXXV. 

 37 {Monogr. Sorbus) (1901). — Schneider, III. Handb. Laubholzk. I. 669, Fig. 367 g 

 (pro parte) (1906). 



Northern China. 



The reasons which have led me not to unite this critical species with the fol- 

 lowing, as Schneider proposes, I have fully explained in Mitt. Deutsch. Dendr. 

 Ges. XI. 56 (1906). Ruprecht compares it with his S. thianschanica and it is not 

 impossible that it is more closely allied to that species than to S. pekinensis. At 

 any rate there does not seem to be sufficient reason yet for considering S. pekinensis 

 as a synonym to S. discolor. 



2. Sorbus pekinensis Koehne in Gartenfl. L. 406 (1901); in Mitt. Deutsch. 

 Dendr. Ges. XV. 56 (1906). 



Sorbus discolor Schneider, III. Handb. Laubholzk. I. 669, fig. 366 1, m, 367 g (pro 

 parte) (1906). 

 Chili: about Peking. 



Known to me only from specimens raised in European gardens, from seed sent 

 by Bretschneider. 



3. Sorbus pohuashanensis (Hance) Hedlund, in Kongl. Svenska Vetensk.-Akad. 

 Handl. XXXV. 33 {Monogr. Sorbus) (1901). — Rehder in Mitt. Deutsch. Dendr. 

 Ges. X. 116 (1901). — Schneider, III. Handb. Laubholzk. I. 672 (1906). 



Pyrus pohuashanensis Hance in Journ. Bot. XIII. 132 (1875). 



Chili: Po-hua-shan, near the summit, 1874, Bretschneider (No. 3), 1881, Bret- 

 schneider (No. 1155); Wei-chang, May 31, 1909, W. Purdom (Nos. 18 & 47). 



I have not seen the specimens collected by Bretschneider; those of Purdom con- 

 sist of sterile twigs. — Cultivated in the Arnold Arboretum and in Europe. 



4. Sorbus Giraldiana Schneider, III. Handb. Laubholzk. I. 672, Fig. 369 a 

 (1906). 



Northern Shensi: Ngo-shan, July 1999, G. Giraldi (No. 5128). 



5. Sorbus expansa Koehne. See p. 457. 



6. Sorbus Wilsoniana Schneider. See p. 458. 



7. Sorbus Esserteauiana Koehne. See p. 459. 



8. Sorbus Conradinae Koehne. See p. 460. 



9. Sorbus Sargentiana Koehne. See p. 461. 



2. Group.' 



10. Sorbus scalaris Koehne. See p. 462. 



11. Sorbus pluripinnata (Schneider) Koehne. 



Sorbus foliolosa, var. pluripinnata Schneider in Bull. Herb. Boissier, s6t. 2, 

 VI. 315 (1906); III. Handb. Laubholzk. I. 680, fig. 374 e' (1906). 

 Szech'uan, A. Henry (No. 8960). 



Sorbus pluripinnata and S. scalaris form a very remarkable and peculiar group. 

 In common with the species of the first group they have the large herbaceous stipules, 

 the large white-tomentose corymbs of several species of that group and the bright 



1 Between the first and the second groups there might be inserted a small group 

 formed of the two Japanese species Sorbus gracilis (Siebold & Zuccarini) C. Koch 

 and S. Schwerini Schneider. 



