Tas. 6788. 
HYDRANGEA petiotaris, Steb. et Zuce. 
Native of Japan. 
Nat. Ord. Saxrrragen.—Tribe HypRaneen. 
Genus Hypranena, Linn. ; (Benth. et Hook. f. Gen. Pl. vol. i. p. 640.) 
Hypranena petiolaris ; frutex alte scandens, glaber v. pubescens, ramis radicanti- 
bus glabris, foliis longe petiolatis ovato- v. rotundato-cordatis ellipticisve acumi- 
natis argute serratis, axillis subtus barbatis, cymis amplis terminalibus planis 
pubescentibus ramulis elongatis, bracteis amplis submembranaceis ellipticis 
caducis, floribus sterilibus (ecyma extimis) longe pedicellatis, sepalis 3-4 rotun- 
datis integris v. subdentatis, floribus fertilibus alabastro globosis, calycis dentibus 
deciduis petalis calyptratim coherentibus, staminibus 15-20, capsula globosa. 
H., petiolaris, Sieb. e¢ Zuce. Fl. Jap. p. 113, t. 59, fig. 2; Franchet et Savat. En. 
Pl. Jap. vol. i, p. 153. 
H. scandens, Maxim. Revis. Hydrang. As. Orient. (in Mem. Acad. Imp. Se. 
Petersb. ser. vii. vol. x.), 16. 
H. cordifolia et bracteata, Sieb. et Zuce. 1. c. p. 106, t. 54; p. 176, t. 92. 
A common plant in the subalpine districts of Japan, and 
extending to the Island of Sachalin. It is a very near ally 
of the Himalayan JZ. altissima, Wall (Fl. Brit. Ind. vol. i. 
p- 404), which only differs in having larger buds and ten 
stamens, and it is very probable that intermediate forms 
will be found in China. Both present the remarkable 
character (so common in Vitis) of the petals cohering into 
a small extinguisher-like cap, and both climb lofty trees 
by adventitious roots developed on the trunk and branches, 
of which economy the Dichotrichwm figured in this very 
number (Plate 6791) offers a parallel. Maximovicz de- 
scribes the stamens as fifteen, but there are as many as 
twenty in the Kew plant. 
H. scandens is a free grower in a cool conservatory, and 
if planted in the ground, and provided with a support, will 
attain a considerable size. The Kew specimen is thus treated 
in the Temperate House, where it has been grown on the 
trunk of a tree-fern (Dicksonia antarctica), flowering in April 
and May. It has been twice received at Kew, first from 
DECEMBER Ist, 1884. 
