4 
about half grown when the flowers open in clusters from their axils. 
The fruit is red with the general appearance of a small oblong plum. 
There are large specimens of this shrub, which has been growing in 
the Arboretum since 1903, on the walk near Centre Street and in the 
Shrub Collection. On the whole it is the most valuable shrub for our 
gardens the Arboretum has obtained from Mongolia. Unfortunately it 
is still rare, for only a few fruits have ever been produced in the Ar- 
boretum, and the plant has proved difficult to increase by cuttings. If 
the Arboretum plants become more fruitful it will be possible to in- 
crease this Prinsepia as the few seeds which have ripened germinated 
readily. 
Mr. J. G. Jack of the Arboretum staff will conduct a Field Class on 
Saturdays during the spring and early summer, to assist those who 
wish to gain a more intimate knowledge of the native and foreign trees 
and shrubs which grow in New England. Instruction will be given in 
informal outdoor talks and in the examination of the plants. Different 
botanical groups will be examined at each meeting, although any trees 
or shrubs found may form subjects for study. No technical knowledge 
or special preparation is required in order to join the class as the in- 
struction is intended to be simple in character, affording opportunities 
for questions and answers relating to the specimens under observation. 
Unless otherwise notified the class will meet promptly at ten o’clock 
in the morning, on Saturdays, in the Arboretum, at the Forest Hills 
entrance, beginning April 29th. The class will close on the 24th of June. 
The fee for the course is $5.00 payable in advance. 
An illustrated Guide to the Arboretum containing a map showing the 
position of the different groups of plants can be obtained at the Admin- 
istration Building, and will be found useful to persons unfamiliar with 
the Arboretum. It can also be obtained from the Old Corner Book 
Store, Bromfield Street, Boston, and from the Secretary of the Massa- 
chusetts Horticultural Society, 300 Massachusetts Avenue, Boston. The 
price is 50 cents. 
Automobiles are not admitted to the Arboretum but visitors who 
desire carriages to meet them at the Jamaica Plain or Forest Hills en- 
trances can obtain them by telephoning to P. F. Keane, Jamaica 344. 
The subscription to these Bulletins is $1.00 per year, payable in 
advance. 
