14 
introduction. All the plants of Viburnum ovatifolium are killed, but 
plants of the other Chinese Viburnums with deciduous leaves are alive 
and in good condition. Staphylea holocarpa, which when in flower 
Wilson considered one of the most beautiful of the Chinese trees, 
has always been tender in the Arboretum and it is not probable that it 
will ever flourish here. 
Some interesting shrubs have been killed to the ground but will 
probably recover; among them are the two Chinese Dipeltas, the 
Chinese Rhus Potaninii, the Chinese Cornus paucinervis, and the Chin- 
ese Salix Bockii. Osmaronia or Nuttallia cerasiformis from the Pacific 
coast, the Rocky Mountain Ceanothus Wrightii, all the Bladder Sennas 
{Colutea)y and the Japanese Benzoins ericium and B. obtusilohum; the 
last, which for twenty-five years has been one of the rare and inter- 
esting plants in the Arboretum, will probably not recover. The familiar 
Exochorda racemosa or grandifiora has suffered badly, but the less 
known and handsomer species from western China, E. Giraldii and E. 
Giraldii Watsonii are uninjured and are now in flower. E. macranthu, 
a hybrid between E. racemosa and E. Korolkowii is uninjured and is 
also in bloom. Many of the forms of the Japanese Prunus Lannesiana 
have suffered badly and several are dead. Among these are some of 
the double-flowered Cherries which' are generally cultivated in Japan. 
There are some serious losses among the Oaks. All the trees of the 
Willow Oak (Q. Phellos) of the south are dead. The largest of them 
here had been growing in the Arboretum since 1877 and had not been 
injured before. The largest plant of Quercus georgiana is dead. This 
is a rare tree from the Stone Mountain region of central Georgia, and 
the plant that has now been killed had been uninjured in the Arbore- 
tum for twenty-one years. Many large trees of the Shingle Oak {Quer- 
cus imbricaria) are seriously injured, and plants of the southern Red 
Oak {Quercus rubra or falcata) which have been growing here since 
1889 are killed. Quercus heterophylla, which has been growing unin- 
jured in the Arboretum since 1879, is also killed. This handsome and 
interesting tree is the first hybrid Oak noticed in America and has 
given rise to many discussions among dendrologists. All the plants of 
the Turkey Oak {Quercus Cerris) are killed, and all the upper branches 
of a large specimen of the form of the common English Oak with 
pendulous branches (Q. Robur pendula) planted in 1899 are dead. Two 
southern Nettle-trees, Celtis mississippiensis and C. georgiana, have also 
been killed. 
Early-flowering Lilacs. The earliest flowering Lilac here in other 
years, Syringa affinis, is not blooming this year and there are not many 
flowers on its variety Giraldii with pale rose-colored flowers. The 
flower-buds of these Lilacs are perfectly hardy and the cold winter can- 
not be charged with the absence of flowers on these north China plants. 
They are tall shrubs of loose and rather ungainly habit, but the foliage 
is good and the flowers are extremely fragrant. Another north China 
Lilac, S. oblata, is blooming well this year although the flower-buds 
are often injured by the cold of less severe winters. If this Lilac 
