R. Douglas & Sons write : " Your experience with Yellow Pine corresponds with ours. We have purchased seeds of Yellow Pine time and again, and found them turn out P. rigida; indeed we have now for the first time true Yellow Pine, P. mitis, two and three years old.

" We have been fortunate in that we always found out before sending out the trees, so that we have never sent out rigida for Yellow Pine.

"It seems to me that some one of you botanists might be smart enough to find distinguishing features in the Red Spruce to make of it a distinct species. The cone and even the seeds are different from either the black or the white. The tree differs in form and color from either of the others ; even the odor of the bruised young twigs, I fancy differs from the others, and last, but not least, it reproduces itself from seed every time, so as to be very readily distinguished from either of the others, even when in the seed bed.

"If only a variety of the Black Spruce, one would suppose that they would mix so as to show all grades between the red and black, but this is not so. The red and black differ in appearance much more than the white and the black ; indeed half the nurserymen do not know the white from the black without the cones, but any one can see the difference between the red and either of the others".