STOCKS FOR CITRUS TREES. 205 



woods and hammock land in Florida and it appears to 

 be well adapted to this class of soils. Plantings should 

 be made on this stock only on these classes of soils or on 

 those correspondingly well supplied with moisture and 

 capable of retaining it. In California it is said to succeed 

 well on alkali lands and Mr. C. H. Shime, of the Califor- 

 nia Experiment Station, recommends it for planting in 

 such localities. 



So far as known this stock is not subject to mal-di- 

 goma, and in some of the world's citrus districts it is 

 used as a resistant stock.* It is sometimes quite severely 

 infested with San Jose scale. This does not interfere 

 with its use as a stock as the other species of citrus are 

 free from this scale. 



The root system produced by the trifoliate orange 

 is very good. The roots penetrate well into the soil and 

 fibrous roots are produced abundantly. 



When supplied with a vigorous top, the root becomes 

 more vigorous, and, strange to say, not a single case has 

 come under observation where the stock did not outgrow 

 any variety worked on it. The trifoliate root is larger 

 just below the point of union than the cion trunk is just 

 above. This goes to show that the stock is influenced by 

 the top and made to grow much more vigorously than 

 might be expected. The diameter of worked trifoliate 

 trunks just below the point of union greath 7 exceeds that 

 of seedling trifoliate trees of equal age at the same dis- 

 tance from the surface of the ground. 



Many writers on citrus propagation have stated with- 

 out reservation that C. trifoliata stock dwarfs the top 

 worked upon it. Exception must be taken to the breadth 



Ed. Gardener's Chronicle, 27:270, Ap., 1900. 



