H 
SAXIFRAGACEAE. — HYDRANGEA 39 
Hydrangea Bretschneideri, var. lancifolia Rehder. See p. 28. 
Hydrangea Bretschneideri, var. Giraldii Rehder, n. var. 
Hydrangea Giraldii Diels in Bot. Jahrb. XXIX. 373 (1900). 
I am not able to separate H. Giraldii specifically from H. Bretschneideri; it seems 
to differ only in narrower leaves gradually narrowed into the petiole and in the paler 
color of the bark. In the shape of the leaves it resembles H. xanthoneura, var. 
Wilsonii Rehd. which is easily distinguished by the leaves being glabrous or nearly 
80 beneath. 
Northern Shensi: T'ai-pa-shan, December 1893, G. Giraldi (No. 1169! No. 
1172 ex Diels); Huan-tou-shan, Ki-shan, G. Giraldi (No. 1167, 1171 ex Diels); 
Tue-lian-pin, G. Giraldi (No. 1168). 
12. Hydrangea mandarinorum Diels in Bot. Jahrb. XXIX. 372 (1900). 
Szech’uan: Nanch'uan, A. von Rosthorn (No. 1932 in Herb. Christiania). 
Diels places this species in the section Petalanthae, but it does not differ in the 
structure of its flowers from H. heteromalla Don and its allies. 
_ Subsect. 3. ASPERAE Rehder, n. subsect. 
Piptopetalae Maximowiez in Mém. Acad. Sci. St. Pétersbourg, X. No. XVI. 8 
(in part) (1867). : 
This subsection is chiefly characterized by the inferior ovary developing into a 
hemispheric or turbinate capsule truncate at the apex. The seeds have a wing 
on each end; the styles are usually 2; the petals fall off before the stamens are fully 
developed, sometimes as a whole by cohering at the apex. The petioles sometimes 
attain 20 em. in length. 
13. Hydrangea Sargentiana Rehder. See p. 29. ; 
14. Hydrangea longifolia Hayata in Jour. Coll. Sci. Tokyo, XXV. 91 (Fl. Mont. 
Formos.) (1908). 
Formosa: Taitou, Torokusha, T. Kawakami & G. Nakahara (No. 690, ex Hayata). 
15. Hydrangea Kawakamii Hayata, l. c. 90, t. 8 (1908). 
Formosa: Mt. Morrison, alt. 2300 m., T. Kawakami & U. Mori (No. 1875, 
ex Hayata). 
16. Hydrangea villosa Rehder. See p. 29. 
Hydrangea villosa, var. strigosior Rehder, n. comb. 
Hydrangea aspera, var. strigosior Diels in Bot. Jahrb. XXIX. 375 (1900). 
Szech'uan: Tsaku-lao, Wei-kuan, August 20, 1891, A. von Rosthorn (No. 2546). 
Hupeh: A. Henry (No. 2473); August 1901, E. H. Wilson (Veiteh Exped. No. 
1473*, with sterile flowers). 
Differs from the type by its less villous tomentum.  Branchlets usually only 
appressed strigose with fulvous hairs at the nodes; petioles hirsute with fulvous 
hairs interspersed; leaves hirsute-villose beneath, the hairs on the veins scarcely 
longer and not fulvous. 
17. Hydrangea fulvescens Rehder, n. sp. ic d i 
Frutex cirea 1 m. altus ramulis junioribus parce strigosis pilis aperiri 
Tufescentibus intermixtis, vetustioribus griseo-brunneis peridermate sotu 5 
Folia membranacea, ovata v. ovato-oblonga, acuminata, basi Puget 
cordata, irregulariter serrata serraturis triangularibus acuminatis e med 
curvatis, 9-13 em. longa et 4.5-8.5 cm. lata, supra flavo-viridia, strigosa, in co 
Venisque densius strigosa, subtus pallidiora dense hirtello-strigosa in oli Castles 
venisque pilis longis hirtis fulvis praedita, utrinsecus 7-0-costate) Pe ata, 
p irtis et interdum strigosis obsiti, 3-9 cm. longi. : ^ i 
laxa, strigosa pilis patentibus fulvis interspersis; flores radiantes albi sepalis 4 
