304 WILSON EXPEDITION TO CHINA 



shows as much variation in size of leaves and degree of pubescence as the typical 

 P. fruticosa L., but is readily distinguished by its pure white flowers. From the 

 other white-flowered variety, var. dahurica Lehmann, it difTers in the more or less 

 pubescent leaves and in the absence of the conspicuous tuft of hairs at the apex of 

 the stipules, while in the shape of the sepals there is little or no difference. 



Here may be added a note on a variety not collected during the Arnold Arbore- 

 tum expeditions. 



Potentilla fruticosa, var. parvlfolia Wolf in Bibl. Bot. XVI. 58 {Monog. Potent.) 

 (1908). 



Potentilla parvlfolia Fischer apud Lehmann, Nov. Stirp. Pugil. III. 6 (1831); 



in Nov. Act. Acad. Leop.-Carol. XXllI. Suppl. 20, t. 3, fig. 1 {Revis. Potent.) 



(1856). 

 Potentilla fnUicosa, var. ochreata Hooker f., Fl. Brit. Ind. II. 347 (non 



Lehmann) (1878). 



Western Szech'uan: Sungpan Ting, grasslands, alt. 3300 m., August 1903 

 (Veitch Exped. No. 3467; shrub 0.6 m. tall, flowers white or yellow), west of 

 Tachien-lu, moorlands, alt. 4000 m., June 1904 (Veitch Exped. No. 3468''; shrub 

 0.6 m. tall, flowers yellow). Kansu : Min-chou and Choni, alt. 3000-3300 m., 1911, 

 W. Purdom (Nos. 821, 821^"^, flowers yellow). 



Common on the scrub-clad uplands in northwest Szech'uan. The flowers vary 

 much in color. The specimens differ from typical var. parvifolia in their generally 

 5-foliolate leaves, but the leaflets are narrow and do not exceed 1 cm. in length; 

 only No. 3468" has broader elliptic leaflets, but they are very small, measuring only 

 0.3-0.5 cm. in length. 



ROSA L. 



Rosa multiflora Thunberg, Fl. Jap. 214 (1784). — Lindley, Ros. 

 Monog. 119 (1820). — Seringe in De Candolle, Prodr. II. 598 (1825). — 

 Crepin in Bull. Soc. Bot. Belg. XIII. 250 {Prim. Monog. Ros. 257) 

 (1874); XVIII. 277 {Prim. Monog. Ros. 523) (1879). — Franchet & 

 Savatier, Enum. PI. Jap. I. 134 (1874); II. 343 (1876). — Hooker f. 

 in Bot. Mag. CXVI. t. 7119 (1890). — Sargent in Garden & Forest, 

 III. 405, fig. 51 (1890). — Willmott, Gen. Rosa, I. 23, t. (1910). 



The type of this species which has not yet been recorded from China proper 

 occurs in Japan and Korea. 



Rosa multiflora, var. cathayensis Rehder & Wilson, n. var. 

 A typo recedit inflorescentia magis corymbosa, pauci- v. pluriflora 

 et floribus roseis majoribus. 



Rosa multiflora Hemsley in Jour. Linn. Soc. XXIII. 253 (non Thunberg) 

 (1887) quoad specimina chinensia. — Franchet, PI. Delavay. 218 (1890). — 

 Crepin in Btdl. Soc. Bot. Ital. 1897, 230. — Vilmorin & Bois, Frut. 

 Vilmorin. 83, fig. (1904). — Pampanini in Nuov. Giorn. Bot. Ital. n. ser. 

 XVII. 295 (1910). — Dunn & Tutcher in Kew Bull. Misc. Inform, add. 

 ser. X. 96 {Fl. Kwangtung & Hongk.) (1912). 



