558 JOUKNAL OF THE EOYAL HOKTICULTURAL SOCIETY. 



Primula Littoniana {Gard. Mag. No. 2906, July 10, 1909, p. 528 ; 



fig ) A distinct Chinese species. Flowers rose-lilac ; calyces deep red. 



M. B. 



Primula obeonica gigantea. By C. H. Arranger (Le Jard,, vol. 

 xxiii. No. 530, p. 84 ; March 20, 1900 ; 3 figs.).— This variety (syn. 



P. Arendsi Pax) was a cross between P. obeonica and P. megasaefolia, 

 and M. Jobert has now succeeded by selection in obtaining an even 

 finer plant, P. obeonica gig. race Jobert. The flowers, in every shade of 

 rosy pink, are more than 5 cm. across. The plant is fairly hardy in 

 southern climates ;• elsewhere it requires a greenhouse. — F. A. W. 



Primulas, Hardy. By W. Irving (Garden, May 15, June 5, 12, 19, 

 and 26, July 10 and 31, 1909, pp. 243, 278, 289, 399, 313, 338, and 

 374). — A series of articles in which the writer gives a useful description 

 of some 65 forms and directions for their cultivation. — H. B. D. 



Prunus japonica. By J. Hutchinson (Bot. Mag. tab. 8260). — Nat. 



ord. Bosaceae ; tribe, Pruneae. China and Japan. Shrub ; leaves ovate- 

 lanceolate, 2-2| inches long ; peduncles 1-3 -flowered ; petals obovate, 

 J inch long, rose-pink ; drupes globose, bright red, § inch diameter. 



G. H. 



Prunus maritima. By J. Hutchinson (Bot. Mag. tab. 8289).— Nat. 

 ord. Bosaceae; tribe Pruneae. E. N. America. Shrub, 4-5 feet high 

 cultivated, 12 feet wild; leaves obovate, If inch long, serrate, umbellate ; 

 corymbs short, 10 or fewer flowered ; corolla \ inch across, white. — G. H. 



Prunus tomentosa. By W. T. Macona (Le Jard., vol. xxiii. 

 No. 538, p. 216; July 20, 1909; 1 fig.).— This hardy cherry has been 

 introduced into Canada from Northern China, Manchuria, and Japan. 

 The fruit looks and tastes much like the common cherry. Seed was 

 procured from the Arnold Arboretum, Jamaica Plain, Mass., U.S.A. 

 Those raised on the experimental farm at Ottawa and transplanted in 

 1900 began to bear in 1903. Being a low shrub, and the fruit grown 

 almost on the ground, the buds are mostly protected by snow from 

 frost. The flowers are white or pink, developed on last year's wood, 

 and nearly sessile. At Ottawa, where the common cherry will not 

 flourish, since the temperature often falls too low, the fruit ripens at the 

 end of July. The habitat of P. tomentosa extends from the Orange 

 region to the limit of the Oaks. The fruit is round and smooth, bright 

 crimson; tender, juicy ; small oval stone almost free; pleasant, slightly 

 acid, and astringent flavour ; very good for preserving. — F. A. W. 



Pyrethrums, Large-flowering. By E. Eouhaud (Le Jard., vol. 

 xxiii. No. 535, p. 168 ; June 5, 1909 ; coloured plate). — These varieties all 



originate from the Chrysanthemum roseum Lindl., or Pyrethrum roseum 

 Linn., which came from the Caucasus. Mr. Rouhaud gives a long list of 

 single and double Pyrethrums, and remarks on their being still com- 

 paratively uncommon in gardens. They are best divided in the autumn, 

 every two or four years, since the clumps tend to die out in the middle. 

 They do not flower so well with spring division. — F. A. W. 



