. Circular. Agriculture; Agriculture -- United States. LIMITATION OF SATSUMA ORANGE. 9. Fig. 6.—a small group of thick-walled cells from the pith of the Trifoliate orange. (Mag- nified 372 diameters.) (Drawn by Dr. Theo. Holm.) A longitudinal section of the pith of the sour orange is shown in figure 5. It will be noted that there is an entire absence of cross partitions, and there are no thick walls to be seen. All of the ordi- nary types of citrus fruits, including the sour orange and all that are ever used as stocks in this country, have pith of this cliaractcn* without an}' trace of cross p
. Circular. Agriculture; Agriculture -- United States. LIMITATION OF SATSUMA ORANGE. 9. Fig. 6.—a small group of thick-walled cells from the pith of the Trifoliate orange. (Mag- nified 372 diameters.) (Drawn by Dr. Theo. Holm.) A longitudinal section of the pith of the sour orange is shown in figure 5. It will be noted that there is an entire absence of cross partitions, and there are no thick walls to be seen. All of the ordi- nary types of citrus fruits, including the sour orange and all that are ever used as stocks in this country, have pith of this cliaractcn* without an}' trace of cross partitions built up out of thick-walled cells. These peculiar cells are of such a striking character as to make it easy, by using a low-power microscope, to distinguish between Trifoliate and sour orange stocks—in fact, to dis- tinguish Trifoliate-orange from any other citrus stock—with absolute cer- tainty. To make such an examina- tion it is of course necessary to take out some of the pith of the stock. In the case of nursery stock this can even be done, if desired, without killing the plant, since a cut extending half wa}^ tlirough—necessary to take out the pith—will soon Ileal up. WARNING AGAINST THE PURCHASE OF SATSUMA ORANGES ON SOUR-ORANGE STOCKS. In spite of the fact that Satsuma oranges budded on sour-orange stock are known to be a total failure, some nurserymen have budded them largely on this stock and are even offering tliem for sale on the ground that the Trifoliate stock does not succeed on light, sandy soil, whereas sour-orange stock does succeed in such situations. All this is perfectly true, but no mention is made of the additional and very important (jualification that the Satsuma orange budded on sour-orange stock is perfectly worthless from a commercial point of view on anv soil. In view of these facts, this occasion is taken to urge intending purchasers of Satsuma oranges to insist that they be budded on Trifoliate-orange stock. In no case should t
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