PLANT INTELLIGENCE 
go right ahead with the preparation of April 
buds and leaves. So accurate is plant know- 
ledge about the seasons that Alpine flowers often 
bore their way up through long-lingering snow, 
even developing heat with which to melt the ob- 
struction, when they feel that spring has really 
come. What gives plants such courage in the 
face of contradicting elements, if not an accurate 
sense of the passage of time and therefore the 
memory of other seasons, which implies im- 
agery? 
Until we develop a workable system of 
thought communication with plants, we can 
never scientifically prove that plants are capable 
of psychological ‘‘affections” or emotions. 
Mental states are purely personal matters. We 
would never be sure that any other human 
being went through feelings of love, anger, hate 
and pity, similiar to our own, if he were not 
able to tell us of them. Until the plants can 
describe to us their inner emotions, we can never 
definitely know whether they have real feelings, 
and if they parallel the human variety in any 
degree. But just as we have become able to read - 
a man’s mental processes by his facial expres- 
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