86 
various groups. We are experimenting in the nursery with 
many species of doubtful hardiness. In a severe winter such as 
the last, many plants were killed back, yet only very few were 
killed outright. 
LILAcs 
Accurate maps locating the two hundred and thirty lilac plants 
west of the Rose Garden were made in the winter 1933-34. 
Their identification was taken up in the spring at the time of 
flowering. The reasonably distinct lilacs have been named and 
labels have been attached. Of the two hundred and thirty plants, 
quite a number are identical, and others very nearly so. Many 
of these were received under different names. Some doubtful 
ones have been labeled temporarily, with a view to study in 1935. 
The first of our lilacs were planted eighteen years ago. No spe- 
cial arrangement was followed in the successive plantings since 
that time. Many of the bushes are now overgrown. Some have 
been attacked by borers, or are otherwise in poor condition, so 
that it is now necessary to remove many of them. Of a number 
of our most desirable forms, cuttings grafted on privet have been 
started; a number of the best varieties are still lacking. The 
following is a brief summary: 
SUMMARY OF LILAC SPECIES 
Approximate Total 
We Have Number 
Japonice i Cor OUD & 2547 pneu re 4 
Igaris Group................-- 6 17 
Josikaea Group. ............0-.. 7 9 
16 About 30 (some not hardy) 
SUMMARY OF LILAC VARIETIES 
B* Wr Ht 
Single White......0.........0.25. 8 9 7 
Single Medium... ............... 85. 53 0) 
Single Dark eaiaeeniees 
Double White................... 15 10 5 
Double Medium..............-.. 70). 45 ds 
Double Dark. ss: bento aeea is 244 a4 
6 i 50 
* B: Number of plants in Brooklyn enieas 7 including duplicates. 
TW: Pesmahis ton ms according x to Wister 
tH: Mrs. nee 1933. 
