£T, 33.] TO JOHN TORREY. 315 
as that on food and nutrition—are pretty carefully 
written out. I have contrived a diagram illustrating 
the cycle of relations of three kingdoms, which I think 
is capital (as it is quite original), and which I long to 
show you. If I had three months more, I am con- 
vinced I could put my materials into the form of a 
capital course of lectures. 
Zucearini wrote me a year ago— when he sent the 
Japanese plants that we looked over together — that 
the Japanese species utterly confounded the difference 
between Rhododendron and Azalea; decandrous species 
having deciduous leaves, ete. If they must come to- 
gether (and De Candolle seems doubtful) it would be 
a pity you did not follow that plan, as you early 
adopted it. 
Then after all, in such case, are the Azaleas, as they 
will ever be called in cultivation, to make the section 
Azalea, or is A. procumbens to take that name? ... 
I wish you could see my Lowell anatomical illustra- 
tions. The pity is, that I shall hardly use them in this 
course, now that my introductory lecture only brings 
me down to them (but I shall have them spread to 
look at), and I can only give to the subject about 
twenty minutes of my second lecture. 
But it is very late indeed. Adieu. 
Yours cordially, A. Gray. 
March 1, 1844. 
Well, you have heard what I had to say about my 
introductory lecture. I was satisfied. I said plainly 
what I intended to say and delivered it not very well 
indeed, but well enough to satisfy me that I could do 
well with practice. This evening I have made a second 
trial, and a more trying one by far. I have a cold 
