Rosacee—Rosa. 171 
it a better position, Its flowers are small, white and double, 
and sufficiently resemble, in the narrowness and number of 
petals, the flowers of our common garden Anemones. [ike 
the preceding it comes from China, and is evidently modified 
by long culture. Several sub-varieties are reported, under the 
names Centifolia, Pumila, Pompon Royal, etc., which, how- 
ever, might without inconvenience be reunited under the 
simple name borne by the species. 
XI. Rosa BeRBertiroLi1a, the Barberry- or Simple-leaved 
Rose, we merely mention to complete the series of Roses, for 
it is hardly known in our gardens. It is an undershrub 2 to 3 
feet high, producing suckers abundantly, armed with prickles, 
and its simple leaves are obovate, denticulate, and destitute of 
stipules. The flowers are about the size of the Banksian, 
solitary, bright yellow, with a deep purple spot at the base of 
each petal. This curious species, by some botanists con- 
sidered as forming the type of a distinct genus, under the name 
Hulthémia, or Lowea, is only found in the saline plains of 
the North of Persia and Soongaria, where it is so abundant 
that it is used for heating ovens. Its culture is difficult in the 
North, where it flowers without fruiting ; but it would doubt- 
less succeed better in the South, aud probably some interesting 
varieties might be obtained, either directly or by crossing it 
with other species. In fact, one very curious hybrid exists 
already, known as Hardyi, the issue of a cross between R. clino- 
phglla and R. berberidifolia, the latter furnishing the pollen. 
This hybrid resembles its mother in its compound leaves and 
large stature, and its father in its ternate prickles, and especially 
in its yellow flowers, whose petals bear a brown spot at the 
pase. 
Tring VII.—POMEA. 
Calyx-tube adnate to the ovary (or carpels immersed in the 
fleshy peduncle). Stamens numerous. Fruit pomaceous or 
drupoid. Trees and shrubs. 
9, PYRUS. 
(Including Cydonia, Sérbus, &e.) 
Trees or shrubs. Leaves deciduous, simple or pinnate; 
stipules deciduous. Flowers white, pink, or rose, in terminal 
