Sarifragee—Hydrangea. 183 
has pink flowers with several series of sepals in the sterile ones ; 
H, Azisdi, with ray or barren flowers on very long pedicel 
g 
De 
Fig. 97. Hydrangea Hortensia. (4 nat. size.) 
The above varieties differ considerably in the size, pubescence 
and form of the foliage, but there is a general resemblance not 
easily mistaken. We must not omit to mention that there are 
some varieties prettily variegated in the foliage with red or 
yellow. + 
H. paniculata is a distinct species, in which the inflorescence 
is elongated, not flat or rounded. The variety grandiflora isa 
magnificent plant, in which all the flowers are sterile and 
pure white, forming a very large panicle. H. Thunbérgii is a 
more slender species, with much smaller foliage, and flat cymes 
of blue flowers. The form in cultivation has a few of the outer 
flowers only barren, with rounded striated sepals. H. scdn- 
dens, including H. petiolaris, is of climbing habit, and differs 
from all the preceding in the petals, which cohere at the tips 
and fall together. H. arboréscens is an American species 
of larger stature, with inconspicuous greenish-white flowers, 
few of which are sterile and enlarged, H. quercifolia, another 
American species, has lobed leaves and terminal panicles of 
greenish white or pink flowers, in part barren. 
