69 
the month of May, the pendulous or spreading panicles are so 
clustered and so numerous on the iree that it is covered with 
blossom. It then makes a strikingly conspicuous object in the 
landscape and one of the handsomest of Chinese trees. The Kew 
plants were raised from seed gathered in 1907 and 1910. They 
are growing promisingly. The ‘‘ Wilson’? numbers of this tree. 
are 154, 258, and 258a. 
Prinsepia uniflora, Batalin. Rosaceae. 
e genus Prinsepia has been known for some years past im 
shrub collections by P. sinensis, more commonly known as 
Plagiospermum sinense, Oliv. (see Kew Bulletin, 1909, p. 354). 
This year, until spoilt by the snow and frosts of early March, 
P. sinensis was flowering at Kew very prettily. Sir F. W. 
Moore also sent sprays thickly furnished with blossom from 
Glasnevin. A plant of P. uniflora has just been received from 
_ the Arnold Arboretum, where the species was raised in 1911 
from seed collected by Purdom in Shensi, and where it has 
flowered and developed fruits. It is a deciduous shrub, its 
branches armed with slender, straight thorns } to } in. ong. 
The leaves are dark glossy green, 1 to 21 in. long, } to } in. 
wide, the margins of the lower part very sparsely serrate. As 
in P. sinensis the flowers come from the axils of the clustered 
leaves on the year-old shoots, but they are very distinct from 
the bright yellow ones of that species in being white. Each 
ower is 3 in. wide, borne on a glabrous peduncle } in. long, 
the petals obovate, the calyx roundish, ciliate. 
Closely allied to P. sinensis, this is distinguished, not only 
by the white flowers, but also by the shorter peduncles and. 
narrower leaves distantly toothed towards the base. 
Prunus Conradinae, Koehne. Rosaceae. 
Among the numerous species of Prunus introduced from China 
by Wilson, this has been the first to establish its value as a 
flowering tree. During the last week of January, 1916, and the 
first week of February it was the most attractive tree or shrub 
in flower out-of-doors at Kew. And we heard from Mr. J. C. 
Williams that at Caerhays it was also very beautiful about the 
same time. It belongs to the Cerasus or cherry group of Prunus 
and is a deciduous tree reaching 35 to 40 ft. high in a wild 
- As represented by small trees at Kew its branches are 
semi-pendulous and very graceful (see Plate IIT. facing p. ne 
he oblong or obovate leaves are 2} to 6 in. long, serra — 
narrowed abruptly at the apex to a short, acuminate point. e 
flowers are white, produced three to five together in very shortly- 
stalked umbels. Each flower is about # in. in diameter, the 
narrowly obiong petals being deeply notched or jagged at the 
apex. Many of the stamens. assume a petaloid character. The 
flowers are charmingly fragrant. 
