134 JOt T kftAL OF THE ROYAL HORTICULTURAL SOCIETY. 



;is a vigorous and productive one, the fruits being larger than 1 Amsden/ 

 of line colour, and somewhat earlier. Stone entirely free. Has done well 

 in the open in France. — C. T. D. 



Petunias, Double-fringed/ Perfection Rose.' By M. Houssy 

 [Li Jard. vol. xxii. No. 501, p. 12; January 5, 1908).— New variety with 

 c h ar carmine llowers, sometimes edged with white. Highly recommended 

 for border masses and pot culture. — F. A. W. 



PhaseolllS. By J. Britten {Jour. Bot. 526, pp. 343-4 ; 10/1906).— 



A reclamation of the name P. trilobatus for the species known as Dolichos 

 trilobatus or Phaseolus trilobus. — G. S. B. 



Philodendron Corsinianum. By W. Watson {Bot. Mag. tab. 

 8172). — Nat. ord. Araceae, tribe Philodendreae. Garden hybrid raised 

 by Messrs. Makoy. of Liege. Climbing plant ; leaf -blade, 1J-2J feet 

 long, 11-18 inches broad, cordate ovate, deep green above, dull purple 

 below ; spathe 3 inches long, purple-crimson, with spots of crimson- 

 brown and white dots ; spadix 6-6 1 inches long, creamy- white. — G. II. 



Phosphates, Action of Water and Aqueous Solutions upon. 



By F. K. Cameron and J. M. Bell {U.S.A. Dep. Agr., Bur. of Soils, Bull. 

 11 ; June 1907*; 5 figs.). — An exhaustive account of some of the changes 

 taking place in the phosphates in the soil. The conclusions arrived at are 

 that soil phosphates are decomposed or hydrolysed by water with the 

 formation of other phosphates containing relatively more of the base. 

 Neutral salts in solution usually increase the amount of phosphoric acid 

 and of lime going into solution from a lime phosphate. Lime salts and 

 alkaline solutions decrease the amount of both in solution, and acid 

 solutions increase it. Neutral salts have little action on phosphates of 

 iron and alumina, while salts which hydrolyse with the formation of acid 

 or alkaline solutions increase the amount of phosphoric acid yielded to the 

 solution by the phosphates of iron and alumina. Since all soils contain 

 far more basic matter than is sufficient to combine with the phosphoric 

 acid, the least soluble phosphates are the ones which will be formed and 

 will control the concentration of the soil nioisture. The concentration of 

 the phosphoric acid in the soil nioisture will not be materially affected by 

 the addition of phosphatic fertilizers to the soil, and will vary but little 

 for different soils and with the total amount of phosphoric acid in soils. 

 The changes in both solution and solid which take place during the 

 progress of leaching superphosphates are also described. — F. J. C. 



Polygonum Aubertii. By J. Baum (Die Gart. No. 24, p. 281 ; 



Much II, 1908). — A new species from Tibet; resembles Polygonum 

 Baldschuanicum, but is oven more rapid-growing, and has darker green 

 foliage and pure white flowers.— G. 11. 



Polystichum Braunii in England. (Jour. Hot. 540, p. 451; 

 L2 1907 . This Eem, collected by the Rev. W. H. Painter in Leigh 

 Woods, Bristol, as Asjii.di.it ni aiigidare, has boen identified by Dr. 

 Kumincrlc, of Budapest. An English description is here given.— G. S. B. 



