44 
once and most of them are still growing here. They are all quite small 
with the exception of Tilia japonica' which was raised at the Arbore- 
tum from seeds collected in Japan by Professor Sargent in 1892. It is 
a small tree here with leaves very similar to those of Tilia cordata, of 
which it has sometimes been considered a variety. The Japanese tree 
is chiefly interesting as the first of all the Lindens here to unfold its 
leaves in the spring. When Lindens bloom is a happy time for bees, 
for the flowers of all Linden-trees contain large quantities of nectar. 
Unfortunately that of Tilia tomentosa and T. petiolaris is poisonous. 
Tripterygium Regelii. Climbing plants with handsome foliage and a 
conspicuous inflorescence easy to grow and hardy in New England are 
not too numerous, and Mr. Jack’s introduction several years ago from 
Korea of Tripterygium Regelii made an important addition to the num- 
ber. It is a near relative of the Bitter Sweets (Celastrus) and a native 
of Korea and northern Japan, where it rambles over rocks and bushes, 
and often climbs with stems fifty or sixty feet long into the tops of trees. 
The leaves are long-pointed, dark green, and often six inches in length. 
The small white flowers are produced in narrow open clusters ten or 
twelve inches long, and they are followed by showy, three-lobed, and 
three-winged fruits from half an inch to an inch long. By pinching the 
young shoots this vine can be grown as a shrub. Such a plant is now 
growing and flowering in the Shrub Collection, where it is also growing 
naturally on the trellis next to the different species of Celastrus. 
Periploca sepium. This is another handsome twining plant which the 
Arboretum owes to the labors of Mr. Jack in Korea. It is growing on 
the trellis near the Tripterygium and is unusually full of flowers this 
year. It is a plant with slender stems, pointed dark green and very lus- 
trous leaves about three and a half inches in length and not much more 
than half an inch in width, and small flowers in few-flowered clusters. 
The flowers do not make much show when seen from a distance, but on 
close examination show that they are green on the outside, dark pur- 
ple with a five-lobed crown at the base on the inside, and that they 
are pleasantly fragrant. The plants in the Arboretum have not yet 
produced their slender pod-like fruits, but as they send up numerous 
root suckers this vine can be easily propagated and might soon become 
common in northern gardens. Much better known is Reriploca graeca 
from southern Europe and western Asia which has not yet proved hardy 
in the Arboretum. 
Lonicera prostrata. The attention of persons looking for plants suit- 
able for ground cover is directed to this Honeysuckle discovered by 
Wilson near Sungpan in Szech’uan, western China, at an altitude of about 
twelve thousand feet above sea-level. It has long slender branches 
which lie flat on the ground, so that the plant is only a few inches high, 
small bluish green leaves, small inconspicuous yellow flowers and small 
red fruit. As a garden plant this Honeysuckle has nothing to commend 
it but its habit which should make it useful to cover the ground among 
large shrubs and on the borders of shrubberies. Lonicera prostrata is 
growing on the southern slope of Bussey Hill with the other new 
Chinese shrubs. 
