1178 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY, 



with leguminous plants, as Cowpeas, Velvet-Beans, &c, which can be 

 ploughed in. 



Besides nitrogen, this process will increase the humus in the soil, 

 which for its water-holding properties is most valuable to the pecan tree. 



Old trees can be renewed and made to bear good marketable nuts, by 

 being gradually worked over. 



The number of varieties has been increased until now there are about 

 fifteen desirable sorts of Louisiana origin, amongst them being 1 Cen- 

 tennial,' ' Carman,' 'Frotscher,' 'James's Giant,' &c. — C. H. C. 



Perfumes Of Flowers. By P. Hariot ■ (Le Jard. May 5, 1902, 

 p. 129). — Many of these so-called "Extracts " are chemical forgeries un- 

 connected with the flowers they represent. Some are products of other 

 plants, as Essence of Violets, from Iris root. But extract of sour milk 

 and rotten cheese is made to imitate the flavour of Pears, Melons, Bananas, 

 &c— C. W. D. 



Pernettyas. By W. T. (Gard. Mag. No. 2534, p. 313, 24/5/1902).— 

 A good account of these beautiful shrubs, descriptive of the varieties or 

 rather the garden forms, with berries ranging in colour from white to 

 pinks and crimsons. Notes on the culture, both in the open air and in 

 pots under glass, are given.— W. 67. 



Phaeoptilum spinosum. By Spencer Moore (Journ. Bot. 480, pp. 

 408-9 ; 12/1902). — Admitting the specific identity of the recently de- 

 scribed Amplioranthus spinosus, ascribed to the Gczsalpiniea (see Journ. 

 R.H.S. vol. xxvii., p. 724) with this previously described member of the 

 Nyctagincce. — G. S. B. 



Philadelphia, Species of. By G. G. (Gard. Mag. No. 2555, p. 677 ; 

 18/10/02). — The Mock Oranges or Syringas, the popular names by which 

 the various species of Philadclphus are known in gardens, are reviewed 

 in this article, which is accompanied by illustrations of some of the most 

 valuable kinds. Special note is made of the several beautiful hybrids 

 which have been obtained during recent years by hybridising the eastern 

 and the western species, and for those we are indebted to the veteran 

 hybridist M. Victor Lemoine, of Nancy. 



This is a large genus of flowering shrubs, many species of which are 

 introduced, but they so nearly resemble each other that the selection of 

 kinds should be discriminatory. 



All the hybrids are, however, without exception, worth cultivating. 

 The article is beautifully illustrated. — W. G. 



Phyteumas, The. By Henry Correvon (Garden, No. 1626, p. 39 

 17/1/1903 ; No. 1627, p. 57 ; 24/1/1903).— The genus Phyteuma is one 

 of the most completely alpine of the Campanulaccce. Among the fifty- 

 one species recognised by the " Index Kewensis," eighteen are special to 

 Eastern Europe and Asia Minor, one to Siberia, one to the Himalayas, 

 and one to Japan. From the horticultural point of view, the one chiefly 

 under consideration, there are many more Phyteumas than appear in the 

 Kow list. A description of the best garden species is given, with cultural 

 details.— E. T. C. 



