26 WILSON EXPEDITION TO CHINA 
Kiangsi: Kuling, abundant, side of streams, July 27, 1907 (No. 
1601). 
This is as far as I know the first time that H. paniculata has been found in China. 
The specimen differs very little from the Japanese plant; the serratures of the 
leaves are strongly incurved, the veins are yellow on the upper side and strigosely 
pubescent below, while in the Japanese specimens the leaves are nearly glabrous 
and the teeth are slightly spreading. 
Hydrangea hypoglauca Rehder, n. sp. 
Frutex ad 3 m. altus ramulis junioribus castaneo-purpureis glabris, 
lenticellis inconspicuis institutis. Folia ovata v. ovato-oblonga, 
acuminata, basi rotundata v. late cuneata, argute mucronulato- 
serrulata, supra flavo-viridia, glabra nervis strigosis flavescentibus 
exceptis, subtus glauca (sub lente dense papillosa), ad nervos dense 
pubescentia ceterum glabra, 7-10 cm. longa et 2.5-4.5 cm. lata; peti- 
oli graciles, parce pilosi, 2-3 em. longi. Cyma laxa, convexa, radiis 
5-7 decussatis distantibus composita, strigosa; flores radiantes 2-3 
em. diam., sepalis 3-4 late ovalibus v. obovatis albis; calycis dentes 
florum fertilium ovato-triangulares, acuminata; petala alba, ovato- 
oblonga, concava, apice cucullata, 2 mm. longa; stamina inaequalia, 
breviora petalis subaequilongis, longiora 3 mm. longa; styli 3, erecti; 
ovarium semisuperum. Capsulae maturae desiderantur. 
Western Hupeh: A. Henry (No. 6056, type); north and south of 
Ichang, thickets, alt. 900-1800 m., June 1907 (No. 2397); no locality, 
June 1901 (Veitch Exped. No. 1271). 
Tisi to Hydrangea zanthoneura Diels which differs chiefly in the more or Jess 
oe piu pio gba on the under side with strigose veins and in the trian- 
Hydrangea xanthoneura Diels in Bot. Jahrb. XXIX. 373 (1900). 
Szech’uan: Nanch’uan, Ching-lung-tsui, August 9, 1891, A. von 
Rosthorn (No. 354, type); Wa-shan, thickets, alt. 1800-2600 m., July — 
and November 1908 (Nos. 2409, flowers, and 1354, fruits); Tachien-lu, 
thickets, alt. 2400-2700 m., October 1910 (No. 4391); Pan-lan-shan, 
west of Kuan Hsien, thickets, alt. 2200 m., August 1910 (No. 4484). 
Mt. Omei, July 1904 (Veitch Exped. Nos. 4899 and 4900). 
This is apparently a very variable species and closely related to H. Bretschneideri 
from which it can be separated only by the glabrous or glabrescent under side of 
the leaves more or less cuneate at the base. In the type the under side of the leaves 
is glabrous or nearly glabrous except the strigose veins which are yellowish on the 
upper side; the branchlets are bright reddish brown with the bark without lenticels 
and soon separating into thin flakes. Wilson’s Nos. 4391 and 4899 seem nearest 
to the type. No. 4484 is also near the type, except that it has the leaves loosely 
pubescent beneath, while the other numbers of Wilson differ in their large foliage, 
