EOSACEAE. — KOSA 327 



and October 1908 (No. 1134, type); west of Kuan Hsien, Pan-lan- 

 shan, thickets, alt. 2300-3800 m., June 1908, October 1910 (Nos. 3582, 

 4312); west and near Wen-ch'uan Hsien, thickets, alt. 2300-2600 m., 

 July 1908 (No. 3580); Tachien-lu, thickets, alt. 2800 m., July 1903, 

 July and October 1904 (Veitch Exped. Nos. 3535% 3535, Seed No. 

 1841). 



This pretty and distinct species is perhaps most closely related to R. persdosa 

 Rolfe, which is a much more vigorous plant with very densely setose stems, larger 

 leaves of fewer differently shaped leaflets, much branched, many-flowered corymbs 

 of pink flowers and globose fruit. It may also be compared with R. sertata Rolfe, 

 which has pink flowers on shorter pedicels, large bracts and bractlets, leaves 

 composed of fewer, differently shaped leaflets, stems slightly and rarely setose and 

 globose fruit. This new species is not uncommon in the upland thickets of the 

 Chino-Thibetan borderland, and it is the only Rose in this group we have met with 

 which has white flowers. No. 4312 has smaller and more oval leaflets and smaller 

 fruits and may possibly represent a distinct variety. No. 3580 resembles No. 

 4312 in the shape of the leaflets, and the flowers are described as pink. 



It is named for my daughter Muriel. (E. H. W.) 



Rosa sertata Rolfe in Bot. Mag. CXXXIX. t. 8473 (1913). — Os- 

 borne in Gard. Chron. ser. 3, LIV. 166, fig. 63 (1913). — Willmott, Gen. 

 Rosa, II. 493 (1914). — Bean, Trees & Shrubs Brit. Isl. II. 443 

 (1914). 



Rosa Webbiana Vilmorin & Bois, Frut. Vilmorin. 93 (non Wallich) (1904). 

 Rosa macrophylla, f. gracilis Focke in Not. Bot. Gard. Edinburgh, VII. 69 

 (1911), No. 4442 excluso. 



Western Hupeh: Changlo Hsien, thickets, alt. 1300-2000 m., 

 June 1910 (No. 3593; bush 1-1.5 m. tall, flowers rose-red) ; Fang Hsien, 

 thickets, alt. 1600-2300 m., June and October 1910 (Nos. 4417, 4643, 

 4645; bush 1-2.5 m. tall, flowers pink, fruit orange-red) ; same locality, 

 July 1901 (Veitch Exped. No. 2325; bush 2 m. tall, flowers pink); 

 without locality, A. Henry (No. 6997). Eastern Szech'uan: 

 Wushan Hsien, A. Henry (No. 5679). Western Szech'uan: with- 

 out precise locality, alt. 300-1300 m., October 1904 (Veitch Exped. 

 Seed No. 1492; bush 0.6-2 m. tall, flowers pink). Kansu : Min-chou, 

 alt. 2600-3000 m., 1911, W. Purdom. Yunnan : Tali valley, alt. 2000 

 m., June 1906, G. Forrest (Nos. 4445, 4447) ; eastern flank of the Tali 

 range, alt. 2100-2400 m., June 1906, G. Forrest (No. 4453). 



This pretty Rose with its small flowers is common on the mountain slopes of 

 western Hupeh, but is rare in western Szech'uan. None of our specimens have 

 flowers as large as those figured in the Botanical Magazine. A specimen collected on 

 " Thae-pei-san," in Shen.si by G. Giraldi, in September 1897, may belong here. 



