SAXIFRAGACEAE. - 1 - HYDRANGEA 33 



Western Szech'uan: Wang-t'ien-ling, August 9, 1891, A. von 

 Rosthorn (No. 1168, type). Hupeh: Changyang Hsien, thickets, 

 alt. 30-60 m., September 1907 (Nos. 2393, 2396). 



Wilson's No. 2396 with the leaves 23 cm. long and 3.7 cm. broad approaches 

 var. macrophylla, but on account of the narrowness of the leaves it finds its place 

 perhaps better here. 



Hydrangea Rosthornii Diels in Bot. Jahrb. XXIX. 374 (1900). 



Western Szech'uan: Nanchuan, Ya-chih-pa, August 1891, A. von 

 Rosthorn (No. 471, type); Wa-shan, thickets, alt. 1500-2400 m., July, 

 September and November 1908 (Nos. 1156, 1348, 1372, 2414); Ta- 

 cbien-Iu, thickets, alt. 1800-2500 m., July and October 1908 (No. 

 1365), October 1910 (No. 4337); Mupin, thickets, alt. 2400 m., October 

 1910 (No. 4341); Mt. Omei, July 1904 (Veitch Exped. No. 4903). 



The close relationship of this species with H. robusta Hooker f . & Thomson is 

 still more evident in Wilson's specimens than in the type specimen; the leaves of 

 Wilson's specimens are larger, the largest measuring 25 cm. in length and 17 cm. in 

 width, the longest petiole is 20 cm. long and in some specimens the sterile flowers 

 have strongly toothed sepals. It is also closely related to H. longipes Franchet, 

 which is chiefly distinguished by its smaller and thinner, coarsely serrate leaves, 

 less densely strigose or glabrescent beneath. 



Hydrangea longipes Franchet in Nouv. Arch. Mus. Paris, se*r. 2, 

 VIII. 228 (PL David. II. 45) (1885). 



Hydrangea ( Calyptranthe) longipes Hemsley in Jour. Linn. Soc. XXIII. 273 



(1887). 



Hydrangea aspera, var. a longipes Diels in Bot. Jahrb. XXIX. 374 (1900). 

 Hydrangea (Calyptranthe) Hemsleyana Diels L c. 376 (1900). Pampanini in 



Nuov. Giorn. Bot. Ital. n. ser. XVII. 284 (1910). 



Western Szech'uan: Mupin, June 1869, P. David] Mupin, thick- 

 ets, alt. 1800 m., July 1908 (No. 2406); alt. 1500-2100 m., October 

 1910 (No. 4342); Wa-ssu country, Wen-chuan Hsien, thickets, alt. 

 1100-2100 m., July 1908 (No. 2400); Hsing-shan Hsien, thickets, alt., 

 1200-1800 m., July 1808 (No. 2401); Wa-shan, thickets, 1800-2400 

 m., July 1908 (No. 2413); northeast of Sungpan, thickets, alt. 1800- 

 2200 m., October 1910 (No. 4330); Lungan Fu, alt. 1800-2400 m., 

 August 1910 (No. 4481); Nanch'uan, A. von Rosthorn (No. 1931). 

 Western Hupeh: Chang-lo Hsien, cliffs and thickets, alt. 1300- 

 1500 m., July 1907 (No. 2402); north and south of Ichang, thickets 

 and rocky places, alt. 1200-1800 m., June and November 1907 (No. 

 580); Patung, May 1901 (Veitch Exped. No. 1213); without locality, 

 August 1901 (Veitch Exped. No. 2514); A. Henry (Nos. 5839 A, 

 5839 B). 



