88 MISSOURI BOTANICAL GARDEN BULLETIN 
Among the important taxonomic characters on which he 
placed especial emphasis is the diaphragm, or the partition 
in the node at each leaf. This is present in all species, ex- 
ceptiny Vitis rotundifolia, being thick in some and thin in 
others. He pointed out clearly, and has illustrated carefully, 
the taxonomic value of the cord-like raphe in the seed of 
V. cordifolia, the central position of the chalaza in. 
rotundifolia, the notched or rounded condition of the distal 
end of the seed, as in V. Labrusca and V. rupestris, and the 
long beak of the seed of V. vinifera. He made careful 
records and observations of the difference in the blooming 
time of different species and its bearing upon interspecific 
crosses in the wild forms. He had gone so far into the 
taxonomy of the grape as to make accurate and detailed 
tracings of the type specimens in herbaria, including those 
of Michaux, and five of his species are generally accepted 
by taxonomists to-day. © 
The writings of Dr. Engelmann upon the grape include 
several articles published in the scientific journals as well 
as in horticultural papers. These have to do with taxonomy, 
culture, diseases, varieties, and general observations, and they 
contain many priority statements with reference to species 
and points of taxonomy. His notes show also that he was 
in correspondence with a large number of viticulturists of 
Europe and America, and include quotations and letters. 
This brief account of the notes of Dr. Engelmann on the 
grape is offered partly as an appreciation of his services in 
the study of this group, and partly as an estimate of the 
man and his methods of investigation. The same might be 
repeated with equal or greater emphasis with reference to 
many other genera. Dr. Engelmann was typical of a num- 
ber of men of his day, whose services to science were most 
important. With their passing, however, was ushered in a 
new type of worker who, because of the development of 
science and the broadening and deepening of the field of 
soy eles have ne y been f =e to adopt new 
me : 
THE CATTLEYA ORCHID FLY 
Requests from various parts of the country have come to 
the Garden at different times for full information re arding 
the cattleya fly or borer (Isosoma orchidearum) which is 
occasionally imported from the Cordilleras in South America, 
this being the cattleya region. 
When fresh importations arrive, the plants are usually in 
resting condition. In case the fly is present, an examina- 
