342 WILSON EXPEDITION TO 



flattened prickles, the usually doubly serrate leaflets more or less pubescent be- 

 neath, in the globose-ovoid flower-buds and in the pinnate sepals. 



Rosa bella, f. pallens Rehder & Wilson, f. n. 



A typo recedit floribus pallide roseis. 



Shansi : mountains in northwest, April 1910, W. Purdom (No. 314, seeds only, 

 in part). Cultivated at the Arnold Arboretum; plants raised from Purdom's No. 

 314, together with those of the type; June 1915, type. 



Though this form differs from the type in the pale color of the flowers only, it 

 Beems desirable to distinguish it for horticultural purposes, as both forms are in 

 cultivation, 



30. Rosa Sweginzowii Koehne. See p. 324. 



31. Rosa Moyesii Hemsley & Wilson. See p. 325. 



Rosa Moyesii, f . rosea Rehder & Wilson. See p. 325. 



32. Rosa Murielae Rehder & Wilson. See p. 326. 



33. Rosa sertata Rolfe. See p. 327. 



34. Rosa orbicularis Baker in Willmott, Gen. Rosa, II. 493 (1914). 

 Yunnan: without precise locality, Th. Monbeig (ex Baker), 



35. Rosa multibracteata Hemsley & Wilson. See p. 328. 



36. Rosa Giraldii Cr^pin. See p. 328. 



Rosa Giraldii, f. glabriuscula Rehder & Wilson. See p. 328. 

 Rosa Giraldii, var. venulosa Rehder & Wilson. See p. 328. 



37. Rosa Prattii Hemsley. See p. 329. 



38. Rosa Wilhnottiae Hemsley. See p. 329. 



Sect. 8. LUTEAE Cr6p. 



39. Rosa xanthina Lindley, Ros. Monog, 132 (1820). 



Shantung: Shushan, F. N, Meyer, August 23, 1907 (No. 21620, seeds only). 

 Cultivated at the Arnold Arboretum, raised from seed of Meyer's No. 21620, 

 with the single-flowered form. 



This species was based by Lindley on a Chinese drawing of a double flowered 

 yellow Rose. This double Rose seems to have remained practically unknown 

 until it was sent to Washington from Peking by Frank N. Meyer in 1907. At the 

 Arnold Arboretum it flowered for the first time in 1915. 



Rosa lanthina, f. normalis Rehder & Wilson, n. f . 

 A typo differt floribus simplicibus. 



Rosa pimpinellijolia Bunge in Mem. Sav. Sir. Acad. Sci. St. Petershourg, H. 



100 {Enum. PI. Chin, Bor. 26) (non Linnaeus) (1833). — Hemsley in Jour. 



Linn, Soc. XXlll. 253 (1887). 

 Rosa xanthina Franchet in Nouv, Arch. Mus. Paris, s6r. 2, V. 269, t. 15, fig. 2 



(PL David. I. 117) (non Lindley) (1883). 



Shansi : " near Tsin-tse," May 1907, F. N. Meyer (No. 414). 



We think Franchet is right in considering this the wild form of Rosa xanthina 

 Lindley. According to Bunge (1. c.) and Bretschneider {Hist. Europ. Bot. Disc. 

 Chin. 861 [19081) this Rose is commonly cultivated in Peking cardens. At any rate, 



