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Morphological Grounds 
Pursuant to your request, I am planning some extension 
to the collections of living plants in the Morphological 
Grounds. In addition to the present plantings I consider 
it of special interest (1) to grow plants that illustrate 
various methods of pollination, (2) to grow some of the 
“chimeras,” “graft hybrids” or so called ‘mixed fruits,” 
and (3) to exhibit certain hybrids that are of special 
educational value. 
To the collection of marsh plants I wish to add a colony 
of Carex aquatilis for personal study as well as for the 
general interest which it may have. 
Students and Investigators 
The persons formally enrolled for investigation during 
the past year are included in the following groups: 
1. Students in plant chemistry. Professor William J. 
Gies and Dr. Ernest D. Clark, of the Biochemical Depart- 
ment of Columbia University, offer a course in the chemical 
physiology of plants, which is given at the chemical 
laboratory of the Garden. Professor Gies also visits the 
Garden laboratory in the capacity of consulting chemist 
to advise with any persons having problems in plant 
chemistry. 
2. Research students in botany from Columbia Uni- 
versity. Professor R. A. Harper, Torrey Professor of 
Botany at Columbia University, is present at the labora- 
tories during a part of each week and I am cooperating 
with him in assisting and advising his students who are 
working at the Garden laboriatores. 
3. Investigators holding scholarships. 
4. Students registered only at the Garden and pursuing 
investigations independently or under direction of various 
members of the Garden staff. 
Besides the above there have been many persons whose 
studies in the herbaria, library, laboratories or grounds 
have not been sufficiently extended to warrant formal 
enrollment as students. 
