28 WILSON EXPEDITION TO CHINA 



rato-dentata, supra flavo-viridia, glabra v. fere glabra nervis strigosis 

 exceptis, subtus pallidiora, tota facie crispulo-villosa ad nervos pilis 

 flavidis adpressis dense obtecta, 6-9 cm. longa et 3.5-4.5 cm. lata; 

 petioli graciles, 1.5-2 cm. longi, pubescentes. Cyma fere plana, e 

 radiis 5-7 decussatis distantibus composita, strigosa; flores radiantes 

 circa 2.5 cm. diam. sepalis 4 late ovalibus v. obovatis; calycis dentes 

 florum fertilium triangulares; petala oblongo-ovata, apice cucullata, 

 2 mm. longa; stamina inaequalia, minora petalis breviora, majora 

 petalis paullo longiora; ovarium semisuperum; stylis 3 erectis. Cap- 

 sulae maturae desiderantur. 



Western Szech'uan: Wa-shan, thickets, alt. 1500-2250 m., 

 July 1908 (No. 241 1). 



Closely related to H. xanthoncura Diels which is easily distinguished by the leaves 

 being serrulate, narrower and larger and on the under side nearly glabrous except 

 the strigose veins. 



Hydrangea Bretschneideri Dippel, var. setchuenensis Rehder, n. 

 var. 



A typo recedit foliis majoribus ad 20 cm. longis et 11 cm. latis, venis 

 saepe flavescentibus, petiolis densius pubescentibus, ramulis juniori- 

 bus laxe et sparse pubescentibus, annotinis pallide brunneis lenticellis 

 conspicuis instructis, cymis usque ad 25 cm. diam., laxis, convexis, 

 interdum fere paniculiformibus. 



Western Szech'uan: Wa-ssu country, Wen-chuan Hsien, thickets, 

 alt. 2300-2700 m., July and November 1908 (No. 1323). Western 

 Hupeh: Fang Hsien, rocky places, alt. 1800 m., August 1907 (No. 

 2399)- 



The Szech'uan and the Hupeh plants differ sHghtly; the former has the leaves 

 generally ovate-oblong and approaches also in the somewhat darker color of the 

 branchlets the type, while the leaves of the Hupeh plant are elliptic-oblong or 

 oblong-obovate. 



Hydrangea Bretschneideri, var. lancifolia Rehder, n. var. 



A typo recedit ramulis cinereis lenticellis conspicuis instructis, 

 foliis oblongo-lanceolatis, supra sparse strigosis, subtus tota facie 

 dense crispulo-villosis et ad nervos strigosis, 7-12 cm. longis et 2-3 

 cm. latis. 



Western Szech'uan: Tachien-lu, thickets, alt. 2100-2400 m., 

 June 1908 (No. 2412). 



This variety might possibly be considered a pubescent and narrow-leaved form 

 of H. xanthoneura, since it has almost the same kind of bark as var. Wilsonii of 

 that species. 



